{
  "schema": "omnisaura.snapshot/v2",
  "uid": "omnisaura:profile:diplodocus",
  "genus": "Diplodocus",
  "generated_at": "2026-10-12T10:16:43Z",
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      "value": "Marsh 1878",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
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    },
    "type_species": {
      "value": "Diplodocus longus",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
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    "order": {
      "value": "Saurischia",
      "rule": "Gap filled from NHM",
      "rule_id": "merge:gap_fill_nhm",
      "synthesis": false,
      "sources": [
        {
          "source": "nhm",
          "license": "CC0-1.0"
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    },
    "family": {
      "value": "Diplodocidae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        },
        {
          "source": "nhm",
          "license": "CC0-1.0"
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      ]
    },
    "parent_name": {
      "value": "Diplodocinae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "headline": {
      "value": [
        157.9,
        143.1,
        null,
        null
      ],
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "evidence": {
      "value": [
        154.8,
        143.1
      ],
      "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": [
        "GB",
        "US"
      ],
      "rule": "Union of all sources (ISO 3166)",
      "rule_id": "merge:union_iso3166",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        },
        {
          "source": "nhm",
          "license": "CC0-1.0"
        }
      ]
    },
    "formations": {
      "value": [
        "Morrison Formation"
      ],
      "rule": "Canonical names, automatic and editor-approved matches applied",
      "rule_id": "merge:canonical_formations",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        },
        {
          "source": "nhm",
          "license": "CC0-1.0"
        }
      ]
    },
    "common_names": {
      "value": [
        "es:diplodocus",
        "it:diplodoco",
        "ja:ディプロドクス",
        "zh:梁龍"
      ],
      "rule": "Wikidata leads",
      "rule_id": "merge:lead_wikidata",
      "synthesis": false,
      "sources": [
        {
          "source": "wikidata",
          "license": "CC0-1.0"
        }
      ]
    },
    "named_after": {
      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
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  },
  "confidence": {
    "name": {
      "level": "high",
      "basis": "corroborated",
      "reasons": [
        "PBDB and Wikidata identify the same genus."
      ]
    },
    "authority": {
      "level": "high",
      "basis": "corroborated",
      "reasons": [
        "PBDB and Wikidata agree."
      ]
    },
    "type_species": {
      "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 62 confirmed PBDB records."
      ]
    },
    "common_names": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only Wikidata gives this; nothing contradicts it."
      ],
      "source": "Wikidata"
    },
    "countries": {
      "level": "mixed",
      "basis": "items",
      "reasons": [
        "Entries differ; see each entry."
      ],
      "items": [
        {
          "value": "GB",
          "level": "low",
          "basis": "disputed",
          "reasons": [
            "NHM records it here but PBDB has no record in this country; awaiting an editor."
          ]
        },
        {
          "value": "US",
          "level": "high",
          "basis": "corroborated",
          "reasons": [
            "NHM and PBDB both record it."
          ]
        }
      ]
    },
    "formations": {
      "level": "high",
      "basis": "items",
      "reasons": [
        "See each entry."
      ],
      "items": [
        {
          "value": "Morrison Formation",
          "level": "high",
          "basis": "corroborated",
          "reasons": [
            "NHM and PBDB both record it."
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        }
      ]
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        "field": "named_after",
        "label": "Named after",
        "note": "No source we use gives this yet."
      }
    ],
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      {
        "field": "type_species",
        "label": "Type species",
        "source": "PBDB"
      },
      {
        "field": "parent_name",
        "label": "Parent group",
        "source": "PBDB"
      },
      {
        "field": "order",
        "label": "Order",
        "source": "NHM"
      },
      {
        "field": "common_names",
        "label": "Common names",
        "source": "Wikidata"
      }
    ],
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      {
        "field": "countries",
        "label": "Countries",
        "note": "One source records a country the other does not.",
        "values": [
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            "source": "PBDB",
            "source_id": "pbdb",
            "value": "US"
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            "source": "NHM",
            "source_id": "nhm",
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        ]
      }
    ],
    "withheld": [
      {
        "records": "occurrences",
        "status": "tentative",
        "count": 4,
        "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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    {
      "name": "Morrison",
      "same_as": "Morrison Formation",
      "status": "automatic",
      "ruling": null
    }
  ],
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    "scope": "confirmed matches only",
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        "attribution": "The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/a40fce8a-130f-4882-acb9-1b61f0459005)"
      },
      {
        "media_id": 645,
        "title": "010035517_L010093362",
        "category": "Specimen",
        "url": "https://data.nhm.ac.uk/media/26a7f4e0-23a2-46ae-b1a7-af58096e99db",
        "page_url": null,
        "source": "nhm",
        "rights_holder": "The Trustees of the Natural History Museum, London",
        "catalog_number": "PV R 8924",
        "license_id": "CC-BY-4.0",
        "license_name": "Creative Commons Attribution 4.0",
        "license_url": "https://creativecommons.org/licenses/by/4.0/",
        "requires_attribution": true,
        "share_alike": false,
        "attribution": "The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/26a7f4e0-23a2-46ae-b1a7-af58096e99db)"
      }
    ],
    "derived_ages": {
      "specimens": 7,
      "ics_version": "v2024/12"
    },
    "references": 243
  },
  "credits_markdown": "## Diplodocus: 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, 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 4 October 2026, 5 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 5 October 2026. _Credited as a courtesy: this licence doesn't require attribution._\n\nAges for 7 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 (16)\n- “File:Diplodocus carnegiei.jpg” (Taxon image): Gunnar Ries Amphibol (Self-photographed), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Diplodocus_carnegiei.jpg). [Creative Commons Attribution-ShareAlike 3.0](https://creativecommons.org/licenses/by-sa/3.0/). Shown unmodified (share-alike licence).\n- “File:Diplodocus carnegii.jpg” (Taxon image): Fred Wierum (Own work), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Diplodocus_carnegii.jpg). [Creative Commons Attribution-ShareAlike 4.0](https://creativecommons.org/licenses/by-sa/4.0/). Shown unmodified (share-alike licence).\n- “File:WLA hmns Diplodocus.jpg” (Taxon image): Wikipedia Loves Art participant \"The_Wookies\" (Uploaded from the Wikipedia Loves Art photo pool on Flickr), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:WLA_hmns_Diplodocus.jpg). [Creative Commons Attribution 2.5](https://creativecommons.org/licenses/by/2.5/).\n- “R3802 Diplodocus longus” (specimen PV R 3802): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/66905b40-a340-4dc3-bdef-f955d76bdc0c). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “Central Hall Diplodocus carnegii sign” (specimen PV R 8642): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/4c2a3223-a4ed-4c9d-80e6-3db41f3918c9). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_22_0117” (specimen PV R 3207): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/5373fa61-c810-425e-88fd-fddfb773a434). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_22_0117” (specimen PV R 3208): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/5373fa61-c810-425e-88fd-fddfb773a434). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_22_0123” (specimen PV R 3228): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2de70140-e287-4800-a8ad-4e679dbacef0). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_22_0231” (specimen PV R 3802): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/2aa7fbd6-6acf-45c2-a57b-4ed3cf4fdb06). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_24_0225” (specimen PV R 8642): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/a86d2d3d-76ed-462c-8ed7-ea26fc35983b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_24_0225” (specimen PV R 8642 $Cast): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/a86d2d3d-76ed-462c-8ed7-ea26fc35983b). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_24_0263” (specimen PV R 8924): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e3f334df-17f7-40b7-8a7d-9dd56db35279). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “R 8642 Diplodocus carnegii Central Hall” (specimen PV R 8642): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/47072242-1520-41be-b258-12c3739e4fdb). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NMHUK PV R 8642 Dippy skull gallery label” (specimen PV R 8642 $Cast): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/a883bfe2-f57b-466d-a32d-ab4cf1f8f7db). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NMHUK PV R 8642 Dippy skull in gallery” (specimen PV R 8642 $Cast): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/a40fce8a-130f-4882-acb9-1b61f0459005). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010035517_L010093362” (specimen PV R 8924): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/26a7f4e0-23a2-46ae-b1a7-af58096e99db). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n\n### Scientific references\n\n243 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": "O. C. Marsh (1878). Principal characters of American Jurassic dinosaurs. Part I. American Journal of Science and Arts 16: 411–416.",
    "authors": "O. C. Marsh",
    "year": 1878,
    "title": "Principal characters of American Jurassic dinosaurs. Part I",
    "publication": "American Journal of Science and Arts",
    "volume": "16",
    "issue": null,
    "pages": "411–416",
    "doi": "10.2475/ajs.s3-16.95.411",
    "url": "https://doi.org/10.2475/ajs.s3-16.95.411",
    "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": "high",
      "reasons": [
        "PBDB gives this publication for the name; its author and year match the naming authority (Marsh 1878), on which PBDB and Wikidata agree."
      ]
    },
    "source": "pbdb",
    "source_name": "Paleobiology Database",
    "license_id": "CC-BY-4.0",
    "pbdb_reference_no": "7803"
  },
  "summary": "Omnisaura summary: Diplodocus, Marsh 1878\n\n- Named by: Marsh 1878 (high confidence: PBDB and Wikidata agree).\n- Family: Diplodocidae (high confidence: PBDB and NHM agree).\n- Order: Saurischia (medium confidence: only NHM gives this; nothing contradicts it).\n- Parent group: Diplodocinae (medium confidence: only PBDB gives this; nothing contradicts it).\n- Type species: Diplodocus longus (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, as published by the Paleobiology Database: 157.9–143.1 million years ago (high confidence: PBDB and NHM agree).\n- Age, Omnisaura's own calculation (not a published figure): 154.8–143.1 million years ago (medium confidence: Omnisaura's calculation from 62 confirmed PBDB records).\n- Fossils found in: United States (high: NHM and PBDB both record it); United Kingdom (low: NHM records it here but PBDB has no record in this country; awaiting an editor).\n- Rock formations: Morrison Formation (high: NHM and PBDB both record it).\n- Original description: O. C. Marsh (1878). Principal characters of American Jurassic dinosaurs. Part I. American Journal of Science and Arts 16: 411–416. https://doi.org/10.2475/ajs.s3-16.95.411 (high confidence: PBDB gives this publication for the name; its author and year match the naming authority (Marsh 1878), on which PBDB and Wikidata agree).\n- Common names: diplodocus, diplodoco, ディプロドクス, 梁龍 (medium confidence: only Wikidata gives this; nothing contradicts it).\n\nNot known or disputed:\n- Countries: sources disagree (PBDB says US; NHM says United Kingdom). Awaiting an Omnisaura editor.\n- Named after: no source Omnisaura uses gives this.\n- 4 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)."
}