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  "schema": "omnisaura.snapshot/v2",
  "uid": "omnisaura:profile:chasmosaurus",
  "genus": "Chasmosaurus",
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  "raw_run": "2026-10-12",
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      "value": "Chasmosaurus",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
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      "value": "Lambe 1914",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
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          "source": "pbdb",
          "license": "CC-BY-4.0"
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      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    },
    "order": {
      "value": "Ornithischia",
      "rule": "Gap filled from NHM",
      "rule_id": "merge:gap_fill_nhm",
      "synthesis": false,
      "sources": [
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          "license": "CC0-1.0"
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      "value": "Ceratopsidae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
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        {
          "source": "nhm",
          "license": "CC0-1.0"
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    "parent_name": {
      "value": "Chasmosaurinae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
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    },
    "headline": {
      "value": [
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        72.2,
        "Campanian",
        null
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      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "evidence": {
      "value": [
        83.6,
        72.2
      ],
      "rule": "Omnisaura synthesis: span of confirmed PBDB records",
      "rule_id": "merge:omnisaura_synthesis_confirmed_occurrences",
      "synthesis": true,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "countries": {
      "value": [
        "CA"
      ],
      "rule": "Union of all sources (ISO 3166)",
      "rule_id": "merge:union_iso3166",
      "synthesis": false,
      "sources": [
        {
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          "license": "CC-BY-4.0"
        },
        {
          "source": "nhm",
          "license": "CC0-1.0"
        }
      ]
    },
    "formations": {
      "value": [
        "Dinosaur Park",
        "Oldman"
      ],
      "rule": "Canonical names, automatic and editor-approved matches applied",
      "rule_id": "merge:canonical_formations",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "common_names": {
      "value": [
        "ja:カスモサウルス"
      ],
      "rule": "Wikidata leads",
      "rule_id": "merge:lead_wikidata",
      "synthesis": false,
      "sources": [
        {
          "source": "wikidata",
          "license": "CC0-1.0"
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    },
    "named_after": {
      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    }
  },
  "confidence": {
    "name": {
      "level": "high",
      "basis": "corroborated",
      "reasons": [
        "PBDB and Wikidata identify the same genus."
      ]
    },
    "authority": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only PBDB gives this; nothing contradicts it."
      ],
      "source": "PBDB"
    },
    "parent_name": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only PBDB gives this; nothing contradicts it."
      ],
      "source": "PBDB"
    },
    "family": {
      "level": "high",
      "basis": "corroborated",
      "reasons": [
        "PBDB and NHM agree."
      ]
    },
    "order": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only NHM gives this; nothing contradicts it."
      ],
      "source": "NHM"
    },
    "headline": {
      "level": "high",
      "basis": "corroborated",
      "reasons": [
        "PBDB and NHM agree."
      ]
    },
    "evidence": {
      "level": "medium",
      "basis": "synthesis",
      "reasons": [
        "Omnisaura's calculation from 19 confirmed PBDB records."
      ]
    },
    "common_names": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only Wikidata gives this; nothing contradicts it."
      ],
      "source": "Wikidata"
    },
    "countries": {
      "level": "high",
      "basis": "items",
      "reasons": [
        "See each entry."
      ],
      "items": [
        {
          "value": "CA",
          "level": "high",
          "basis": "corroborated",
          "reasons": [
            "NHM and PBDB both record it."
          ]
        }
      ]
    },
    "formations": {
      "level": "mixed",
      "basis": "items",
      "reasons": [
        "Entries differ; see each entry."
      ],
      "items": [
        {
          "value": "Dinosaur Park",
          "level": "medium",
          "basis": "single_source",
          "reasons": [
            "Only PBDB records it (17 records)."
          ],
          "source": "PBDB"
        },
        {
          "value": "Oldman",
          "level": "low",
          "basis": "thin",
          "reasons": [
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        }
      ]
    }
  },
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      {
        "field": "type_species",
        "label": "Type species",
        "note": "No source we use gives this yet."
      },
      {
        "field": "named_after",
        "label": "Named after",
        "note": "No source we use gives this yet."
      }
    ],
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        "label": "Authority",
        "source": "PBDB"
      },
      {
        "field": "parent_name",
        "label": "Parent group",
        "source": "PBDB"
      },
      {
        "field": "order",
        "label": "Order",
        "source": "NHM"
      },
      {
        "field": "common_names",
        "label": "Common names",
        "source": "Wikidata"
      }
    ],
    "disputed": [],
    "withheld": [
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        "records": "occurrences",
        "status": "tentative",
        "count": 2,
        "reason": "PBDB fossil records identified only tentatively (for example 'cf.' or '?')"
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      "medium": "One source; nothing contradicts it.",
      "low": "Sources disagree and no editor has ruled yet, or too few records."
    },
    "by": "Omnisaura",
    "license_id": "OMNISAURA-EDITORIAL"
  },
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        "media_id": 2956,
        "title": "R4948-Chasmosaurus-right-ulna-medial",
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        "media_id": 2867,
        "title": "R4948-Chasmosaurus-right-ulna-posterior",
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        "url": "https://data.nhm.ac.uk/media/d83e4e09-9b7b-48bb-ba9e-14ed2deeca9c",
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      {
        "media_id": 2888,
        "title": "R4948-Chasmosaurus-right-ulna-proximal",
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        "url": "https://data.nhm.ac.uk/media/99694a9d-1f0d-4616-94aa-ce20daa8d6a4",
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        "media_id": 2961,
        "title": "R4948-Chasmosaurus-rostral--premaxilla-dorsal",
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        "url": "https://data.nhm.ac.uk/media/6d94085c-4203-4d48-99c0-10c515b06025",
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        "media_id": 2904,
        "title": "R4948-Chasmosaurus-rostral--premaxilla-left-lateral",
        "category": null,
        "url": "https://data.nhm.ac.uk/media/2a8e8869-faa0-4c36-925e-8f230d5d6b3e",
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    "derived_ages": {
      "specimens": 1,
      "ics_version": "v2024/12"
    },
    "references": 113
  },
  "credits_markdown": "## Chasmosaurus: Sources & credits\n\n_Scope: confirmed matches only._\n\n### Data\n- **Paleobiology Database** (https://paleobiodb.org): [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/). Data from the Paleobiology Database (https://paleobiodb.org), licensed CC BY 4.0. Retrieved 4 October 2026, 5 October 2026, 10 October 2026, 11 October 2026.\n- **Natural History Museum Data Portal** (https://data.nhm.ac.uk): [Creative Commons Zero 1.0 (public domain dedication)](https://creativecommons.org/publicdomain/zero/1.0/). Natural History Museum (London) Data Portal, Collection specimens dataset, https://doi.org/10.5519/0002965. Image licenses vary per record. Retrieved 10 October 2026. _Credited as a courtesy: this licence doesn't require attribution._\n- **Wikidata** (https://www.wikidata.org): [Creative Commons Zero 1.0 (public domain dedication)](https://creativecommons.org/publicdomain/zero/1.0/). Data from Wikidata (https://www.wikidata.org), CC0 1.0. Retrieved 10 October 2026. _Credited as a courtesy: this licence doesn't require attribution._\n\nAges for 1 specimen(s) were derived from their stage names using the ICS International Chronostratigraphic Chart v2024/12 (International Commission on Stratigraphy), via the Paleobiology Database (CC BY 4.0).\n\n### Images (137)\n- “File:Chasmosaurus BW.jpg” (Taxon image): Nobu Tamura (http://spinops.blogspot.com) (Own work), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Chasmosaurus_BW.jpg). [Creative Commons Attribution 3.0](https://creativecommons.org/licenses/by/3.0/).\n- “File:Chasmosaurus belli RTM 01.jpg” (Taxon image): ceasol from Edmonton, Canada (Chasmosaurus Belli), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Chasmosaurus_belli_RTM_01.jpg). [Creative Commons Attribution-ShareAlike 2.0](https://creativecommons.org/licenses/by-sa/2.0/). Shown unmodified (share-alike licence).\n- “File:Chasmosaurus.jpg” (Taxon image): Sampson SD, Loewen MA, Farke AA, Roberts EM, Forster CA, et al. (File:Journal.pone.0012292.g008.jpg Scott D. Sampson, Mark A. Loewen, Andrew A. Farke, Eric M. Roberts, Catherine A. Forster, Joshua A. Smith, and Alan L. Titus (2010). \"New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism\". PLoS ONE 5 (9): e12292. DOI:10.1371/journal.pone.0012292.), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Chasmosaurus.jpg). [Creative Commons Attribution 2.5](https://creativecommons.org/licenses/by/2.5/).\n- “File:ChasmosaurusROM.JPG” (Taxon image): Eduard Solà (Own work), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:ChasmosaurusROM.JPG). [Creative Commons Attribution-ShareAlike 3.0](https://creativecommons.org/licenses/by-sa/3.0/). Shown unmodified (share-alike licence).\n- “NHM-UK_P_DF118_03_22_0475” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d1370835-2654-47c1-9c5c-a93d6bc5c67d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-0138” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/1f1d8fc5-8bc1-489c-9c99-4fb1fee32c0f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-0140” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8007cbb7-1818-4675-9ff4-dfc180b30f8c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-braincase-dorsal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/0124e206-d2d9-44b3-8407-005f4ba54737). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-braincase-left-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/52449b43-7f61-4659-a6b6-0084976b9ed0). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-braincase-ventral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/64c103b9-2515-44a1-aefe-9e99f1da3bd3). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-4-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/f12f58ef-abf2-4b6d-b098-a80026c6c17a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-4-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/f094b7f3-6377-4a7b-8974-156cfbdaeee8). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-4-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e7ad6120-da3b-4d32-a831-9b775d571e81). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-5-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/ae20f261-3982-4103-b519-593045b44636). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-5-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/89caa865-0104-494d-934e-b923861551eb). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-5-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d1ac3296-e367-4be3-bb0e-2130e38942cf). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-6-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/9cec8d40-68b2-481c-81bc-38ad97bb28a4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-6-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/0717b1f2-c4f8-477a-a456-c3f196351a7d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-6-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/97396377-4f9c-4a8f-9352-ba9cc6993582). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-7-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/cdedccd6-b307-43c6-80ca-c76002fba9b1). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-7-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/9a7de6d6-8e8a-4f0a-bbb1-3e61b255fb12). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-7-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/17bf8515-0303-4141-b290-de8004ac6841). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-8-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/1f9beeb3-65e4-4422-9684-78a1e5a8a976). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-8-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/f800a9e2-a876-4e4d-999a-40da497c573a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-cervical-8-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/f1b06289-fa69-44bd-8d46-86af2fd66e86). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-1-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/3042b2bc-1dc8-485c-a414-960421de9f62). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-1-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b87b9786-ac46-49eb-89bb-77ed957e95d7). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-1-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/de6ff4ac-00d9-45df-8fd7-5894cff0db94). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-2-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/365de909-edd0-430e-89f0-d1ecff9ab7e6). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-2-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d77012b6-0ed6-4e34-8023-a41183f77355). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-2-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d43bb399-2f02-4524-a705-0db31e6892d6). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-3-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/da4f879e-be6c-4a33-aad9-46d4f4dfaa81). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-3-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/015209e3-85a9-4d85-a059-a341d659ec70). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-3-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/fc3a9baa-9c2c-4715-ad5e-7b0582e45bb4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-4-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8e7e695f-1998-4283-8bb1-fb1d91272e07). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-4-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2c48b73f-f692-462d-b959-e27ccd7271ec). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-4-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/eeef8a55-d58e-4eb4-8ce8-1756891e2085). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-5-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/77aa36e0-1622-41a7-a11d-8770bf8ab933). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-5-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/94aee7e1-2036-4e15-8ea4-a0deffa001ac). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-5-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/3ec1164c-a1ec-468f-b7d5-e01f02916f38). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-6-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/6e048fd7-ca6c-4d67-97e4-94a5057805dc). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-6-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/4feaed2c-7939-46e5-b783-87ea721933ad). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-6-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/568fb39e-6166-4bd4-89c5-2163ca928627). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-7-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/edb41055-a62d-43df-bde5-aa659b9390cf). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-7-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/cdebdcb3-d050-44f1-bef5-30a019c0af35). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-7-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/64b3dd87-eeb3-4e81-b2e1-533986fe5eca). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-centrum-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/5e605bb8-4183-4f13-be14-a7c461d9efb2). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-centrum-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/017b26ea-28f4-4a0c-8de9-18cc5c3f32b4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-centrum-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b57aaf59-5f8a-4aab-8316-64e3f3a2a882). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-ribs-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/cd020a0a-2bbd-4111-bdd5-f57b0f0dc03e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-dorsal-ribs-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/c9ca73f2-665c-4fe8-8caf-13ae309e435f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-circumorbital-region-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/925c089f-5436-422d-8373-2190b71cac42). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-circumorbital-region-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/848ce4a7-0e09-4d34-80e2-fa819d7a30ba). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-coracoid-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/6b6fb976-7894-414a-9d75-34ee842d6cc1). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-humerus-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/bbedf792-2700-4934-92cb-88628374cb9a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-humerus-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/aecb0e4d-caac-4c49-b56c-c6fe7ae2c90a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-humerus-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/3c50225d-1c26-44a1-8b66-5d6a2680ec6b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-humerus-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/03e600c3-5fd6-4ad8-9933-deeb3fbeb64e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-humerus-proximal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/7344dd80-517b-4ff5-a303-1843ecdfe062). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-maxilla-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d9afab9a-1333-4d41-9b52-0cc9beadca07). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-maxilla-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/00188099-63cf-4039-bd1a-bfc37fd5379e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-postorbital-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/bd47df30-421b-4c43-a0c0-a19dcbf19b57). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-postorbital-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/bd8545a2-ef65-448c-ba0a-0ced9706b375). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-quadrate-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/f6fdb6ad-9963-40a4-a897-85cc8ff9afda). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-quadrate-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/3ed788a0-d1e6-4fb5-82d8-4a3371b112fd). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-quadratojugal-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/19f36312-981c-4bac-b5d9-503f71132273). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-quadratojugal-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b865a8c0-f7c5-4622-a4a3-521cd6031919). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-quadratojugal-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/0c57ff2e-c8e2-4032-b519-f9a474a7ab5e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-scapula-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b9bf260b-241e-488c-a5c6-d1ef7a913a59). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-scapula-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/9d883796-925f-4e80-ae67-621c0db5e7d7). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-scapula-proximal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/7031562b-8a6f-4378-a96b-4ed0c636988b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-ulna-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/373dcd31-41cd-43be-b9be-7d6dd2c7d0f6). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-ulna-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/bbcc599a-0db3-4b57-8733-6a3cd6661273). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-ulna-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/91495530-f18e-45d2-bf70-c653bdb9f31a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-left-ulna-proximal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8f662243-870a-45a2-9ea3-0194b4904878). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-nasals-dorsal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/07ce39c7-a7b6-463f-8961-62bb332326eb). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-nasals-left-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e95fb523-3cd5-4022-9062-d05b68ae2d54). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-nasals-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/3ab78c51-e911-43bb-96d1-4f0d8790cbfc). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-anterior-bar-part-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/cdfd0949-ea42-44c8-a8b2-40b9f0e8ffb4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-anterior-bar-part-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8f4dff92-b195-4e12-8877-d6091ecadc3f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-central-bar-part-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/81dc68c4-5cf7-46a5-b829-2c956de2221b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-central-bar-part-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/aa8e7063-6245-4b50-81a7-60d02c19e150). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-1-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/be53f25a-b020-4f62-8901-895624440767). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-1-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/1600d443-ccf7-47ca-92d9-5fb96ccadce8). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-2-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/93422990-f7bb-47f1-84e7-4c85f4b70a65). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-2-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d56c95c8-b66f-490a-9ba6-f47e83f5449b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-3-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/3a4b8983-b3ad-47ab-a2cd-2c160e7cf8d4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-3-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/545066d8-b64c-4027-a201-200ee3c00fe4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-4-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e5b29229-700d-42a2-a584-6646f6f60b2d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietal-posterior-bar-part-4-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e447ccf8-027f-4ead-a391-1b108099584c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-parietals-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8de7bc0d-021d-4099-9a4b-68ea2c412ca7). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-predentary-dorsal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/7ac23028-2213-4bfc-aebb-06838270da1b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-predentary-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/acc9be72-b30a-46d5-bac9-9474799fdb1b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-predentary-ventral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/7c9581b6-0494-4cf7-9a18-65a84b68f12c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-reconstructed-dorsal-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/0ac2aad2-895d-49a0-bf81-2657fc53d5f4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-reconstructed-dorsal-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/ae5d279e-9b42-452d-bece-d13a5b26413a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-reconstructed-dorsal-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/f7c3bc76-caf4-412e-859f-c78fa18a2aca). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-circumorbital-region-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/cfd204c3-bd26-457b-a495-7be08ed57566). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-circumorbital-region-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/ea598cac-9d01-4dbe-b1fc-59470f1bf311). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-coracoid-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/4ae1ed6b-f3da-424f-ad08-7931f2e2db4f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-femur-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/5124f96a-8306-4abe-8921-9d33db962b83). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-femur-distal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/500ff667-247e-4d22-a029-c3403a7424f7). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-femur-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d53b259c-30bc-4d90-a08e-641a2f218c6e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-femur-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8e51c678-dd1d-4282-8e56-5f41472eb815). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-femur-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/cbfcc61c-5f51-4dba-a62a-a17dee175ae0). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-femur-proximal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d1cf514d-3001-41d3-8989-f3a56e10e726). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-humerus-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/9c58218d-f1f6-4808-bef9-44cb94d7ed40). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-humerus-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/31106233-4413-46d0-94b3-3de21c4ff2e7). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-humerus-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b56473cf-8442-43d9-85de-7b98cb84aa5d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-humerus-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/032f9aa8-803e-403a-96d4-70f3b9a47721). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-maxilla-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b82e070c-d9d8-425f-a675-7f2c0467f171). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-maxilla-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/59420887-c021-4aa3-b8a7-414593053fde). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-proximal-distal-part-dorsal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/4178d6d9-570c-44f6-816f-83d8d8cc8a82). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-pubis-distal-part-ventral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/1798f228-5e0c-4ad2-b05f-17bc77b470eb). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-pubis-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/98f7b0df-a2d7-44b2-9b37-d78bee113547). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-pubis-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e95f9778-3279-4137-b0d5-279efe5f58f9). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-quadrate-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/5cb6e9ee-97e2-48c4-8d07-d85cf02366e3). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-quadrate-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/a454eb74-5b97-49af-a9e2-bd8458e0027a). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-quadratojugal-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2e788f9c-e856-4c94-a0b2-82d71965dc32). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-quadratojugal-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/afd7373c-be10-4d76-933b-08ea265d739f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-quadratojugal-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/63064cc9-2400-470a-a738-504699304ebf). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-radius-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/1a416f1b-8336-4c2a-9f90-cef0f4e5bf6f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-radius-dorsal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2f71c527-eafc-40fc-a2c4-c01860201ebd). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-radius-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/ef8421b2-488a-4f09-b417-24973d120353). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-squamosal-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/08be4c5e-7548-4ee8-a56a-be1ee6ab2e2c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-squamosal-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/af19af17-7a19-4bfb-b589-b79209e6659c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-ulna-anterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/103b1349-9369-4e83-be2a-21ea0ff1b0a0). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-ulna-distal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/81256915-8877-46d6-a402-67b5b5aa5686). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-ulna-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b8288fd3-1264-428c-a8bc-057ffdcb11ad). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-ulna-medial” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2744cc00-196a-4aff-aaff-ae5cda7a5a0e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-ulna-posterior” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/d83e4e09-9b7b-48bb-ba9e-14ed2deeca9c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-right-ulna-proximal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/99694a9d-1f0d-4616-94aa-ce20daa8d6a4). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-rostral--premaxilla-dorsal” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/6d94085c-4203-4d48-99c0-10c515b06025). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-rostral--premaxilla-left-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2a8e8869-faa0-4c36-925e-8f230d5d6b3e). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-rostral--premaxilla-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/98be3b1e-668f-4fbd-b7fa-32276ea5c5ba). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-syncervical-left-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/26d60c78-bb13-4a32-aa03-6aa9e6d66abe). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R4948-Chasmosaurus-syncervical-right-lateral” (specimen PV R 4948): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/9798145f-1d63-4b53-bef0-c700f0c88356). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n\n### Scientific references\n\n113 published reference(s) support this entry (via the Paleobiology Database).\n",
  "notice": "Omnisaura data combines sources under different licences. Every genus file lists its credits; anyone showing a value must show the credits for it. Images keep their own licences; share-alike images may only be shown unmodified.",
  "fossil_basis": "body",
  "original_description": {
    "citation": "L. M. Lambe (1914). On Gryposaurus notabilis, a new genus and species of trachodont dinosaur from the Belly River Formation of Alberta, with a description of the skull of Chasmosaurus belli. The Ottawa Naturalist 27(11): 145–155.",
    "authors": "L. M. Lambe",
    "year": 1914,
    "title": "On Gryposaurus notabilis, a new genus and species of trachodont dinosaur from the Belly River Formation of Alberta, with a description of the skull of Chasmosaurus belli",
    "publication": "The Ottawa Naturalist",
    "volume": "27",
    "issue": "11",
    "pages": "145–155",
    "doi": null,
    "url": null,
    "what": "The publication the Paleobiology Database gives as the authority for this genus name, usually the one that first named and described it.",
    "confidence": {
      "level": "medium",
      "reasons": [
        "Only PBDB gives this; its author and year match the naming authority (Lambe 1914)."
      ]
    },
    "source": "pbdb",
    "source_name": "Paleobiology Database",
    "license_id": "CC-BY-4.0",
    "pbdb_reference_no": "17546"
  },
  "summary": "Omnisaura summary: Chasmosaurus, Lambe 1914\n\n- Named by: Lambe 1914 (medium confidence: only PBDB gives this; nothing contradicts it).\n- Family: Ceratopsidae (high confidence: PBDB and NHM agree).\n- Order: Ornithischia (medium confidence: only NHM gives this; nothing contradicts it).\n- Parent group: Chasmosaurinae (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, as published by the Paleobiology Database: Campanian, 83.6–72.2 million years ago (high confidence: PBDB and NHM agree).\n- Age, Omnisaura's own calculation (not a published figure): 83.6–72.2 million years ago (medium confidence: Omnisaura's calculation from 19 confirmed PBDB records).\n- Fossils found in: Canada (high: NHM and PBDB both record it).\n- Rock formations: Dinosaur Park (medium: only PBDB records it (17 records)); Oldman (low: only one PBDB record).\n- Original description: L. M. Lambe (1914). On Gryposaurus notabilis, a new genus and species of trachodont dinosaur from the Belly River Formation of Alberta, with a description of the skull of Chasmosaurus belli. The Ottawa Naturalist 27(11): 145–155. (medium confidence: only PBDB gives this; its author and year match the naming authority (Lambe 1914)).\n- Common names: カスモサウルス (medium confidence: only Wikidata gives this; nothing contradicts it).\n\nNot known or disputed:\n- Type species: no source Omnisaura uses gives this.\n- Named after: no source Omnisaura uses gives this.\n- 2 fossil record(s) left out because their identification is uncertain.\n\nNot covered by Omnisaura: diet, size, weight, appearance or behaviour. Do not fill these in from general knowledge as if they came from Omnisaura.\n\nCredits (must be shown with any of this): Natural History Museum Data Portal (CC0-1.0); Paleobiology Database (CC-BY-4.0); Wikidata (CC0-1.0)."
}