{
  "schema": "omnisaura.snapshot/v2",
  "uid": "omnisaura:profile:pelorosaurus",
  "genus": "Pelorosaurus",
  "generated_at": "2026-10-12T10:16:43Z",
  "raw_run": "2026-10-12",
  "profile": {
    "name": {
      "value": "Pelorosaurus",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "authority": {
      "value": "Mantell 1850",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "type_species": {
      "value": "Pelorosaurus conybeari",
      "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"
        }
      ]
    },
    "family": {
      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    },
    "parent_name": {
      "value": "Titanosauriformes",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "headline": {
      "value": [
        145.06,
        110.1,
        "Tithonian",
        "Albian"
      ],
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "evidence": {
      "value": [
        137.05,
        125.77
      ],
      "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": [
        "FR",
        "GB"
      ],
      "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": [
        "Ashdown Formation",
        "Kimmeridge Clay Formation",
        "Tunbridge Wells Sand 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": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    },
    "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"
    },
    "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"
    },
    "order": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only NHM gives this; nothing contradicts it."
      ],
      "source": "NHM"
    },
    "headline": {
      "level": "low",
      "basis": "disputed",
      "reasons": [
        "Sources disagree and an editor has not ruled yet."
      ]
    },
    "evidence": {
      "level": "low",
      "basis": "thin",
      "reasons": [
        "Omnisaura's calculation from only 1 dated record(s).",
        "1 record(s) identified only to genus, dated well outside the species-level records, were set aside as doubtful."
      ]
    },
    "countries": {
      "level": "mixed",
      "basis": "items",
      "reasons": [
        "Entries differ; see each entry."
      ],
      "items": [
        {
          "value": "FR",
          "level": "low",
          "basis": "thin",
          "reasons": [
            "Only one PBDB record."
          ]
        },
        {
          "value": "GB",
          "level": "high",
          "basis": "corroborated",
          "reasons": [
            "NHM and PBDB both record it."
          ]
        }
      ]
    },
    "formations": {
      "level": "low",
      "basis": "items",
      "reasons": [
        "See each entry."
      ],
      "items": [
        {
          "value": "Ashdown Formation",
          "level": "low",
          "basis": "disputed",
          "reasons": [
            "Only NHM gives this name and it matches no PBDB formation; awaiting an editor."
          ]
        },
        {
          "value": "Kimmeridge Clay Formation",
          "level": "low",
          "basis": "disputed",
          "reasons": [
            "Only NHM gives this name and it matches no PBDB formation; awaiting an editor."
          ]
        },
        {
          "value": "Tunbridge Wells Sand Formation",
          "level": "low",
          "basis": "thin",
          "reasons": [
            "Only one PBDB record."
          ]
        }
      ]
    }
  },
  "gaps": {
    "missing": [
      {
        "field": "family",
        "label": "Family",
        "note": "No source we use gives this yet."
      },
      {
        "field": "common_names",
        "label": "Common names",
        "note": "No source we use gives this yet."
      },
      {
        "field": "named_after",
        "label": "Named after",
        "note": "No source we use gives this yet."
      }
    ],
    "single_source": [
      {
        "field": "authority",
        "label": "Authority",
        "source": "PBDB"
      },
      {
        "field": "type_species",
        "label": "Type species",
        "source": "PBDB"
      },
      {
        "field": "parent_name",
        "label": "Parent group",
        "source": "PBDB"
      },
      {
        "field": "order",
        "label": "Order",
        "source": "NHM"
      }
    ],
    "disputed": [
      {
        "field": "headline",
        "label": "Age",
        "note": "The ages of the records reach well beyond the published range.",
        "values": [
          {
            "source": "PBDB",
            "source_id": "pbdb",
            "value": "145.06–110.1 Ma"
          },
          {
            "source": "NHM specimens",
            "source_id": "nhm",
            "value": "154.8–113.2 Ma"
          }
        ]
      },
      {
        "field": "formations",
        "label": "Formations",
        "note": "One source names a formation the other does not.",
        "values": [
          {
            "source": "PBDB",
            "source_id": "pbdb",
            "value": null
          },
          {
            "source": "NHM",
            "source_id": "nhm",
            "value": "Ashdown Formation"
          }
        ]
      },
      {
        "field": "formations",
        "label": "Formations",
        "note": "One source names a formation the other does not.",
        "values": [
          {
            "source": "PBDB",
            "source_id": "pbdb",
            "value": null
          },
          {
            "source": "NHM",
            "source_id": "nhm",
            "value": "Kimmeridge Clay Formation"
          }
        ]
      }
    ],
    "withheld": [
      {
        "records": "occurrences",
        "status": "tentative",
        "count": 1,
        "reason": "PBDB fossil records identified only tentatively (for example 'cf.' or '?')"
      }
    ]
  },
  "assessment": {
    "levels": {
      "high": "Two independent sources agree, or an editor has ruled.",
      "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": "Tunbridge Wells Sand",
      "same_as": "Tunbridge Wells Sand Formation",
      "status": "automatic",
      "ruling": null
    }
  ],
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        "url": "https://data.nhm.ac.uk/media/18aac293-0fdf-4e25-b9e1-0a1e3054d87d",
        "page_url": null,
        "source": "nhm",
        "rights_holder": "The Trustees of the Natural History Museum, London",
        "catalog_number": "PV R 2565",
        "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/18aac293-0fdf-4e25-b9e1-0a1e3054d87d)"
      },
      {
        "media_id": 4334,
        "title": "NHMUK PV R 2565 Pelorosaurus teeth gallery label",
        "category": "Specimen",
        "url": "https://data.nhm.ac.uk/media/393cfce1-bc47-40f8-8df7-1dbf2c50417d",
        "page_url": null,
        "source": "nhm",
        "rights_holder": "The Trustees of the Natural History Museum, London",
        "catalog_number": "PV R 2565",
        "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/393cfce1-bc47-40f8-8df7-1dbf2c50417d)"
      }
    ],
    "derived_ages": {
      "specimens": 7,
      "ics_version": "v2024/12"
    },
    "references": 86
  },
  "credits_markdown": "## Pelorosaurus: 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 5 October 2026, 10 October 2026, 11 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 11 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- “NHM-UK_P_DF118_03_03_0133” (specimen PV OR 28626): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/9932094c-846c-4e79-801c-90fd190da058). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_03_0137” (specimen PV OR 28646): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/03f07efd-9409-46fc-b167-4102534b1854). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_03_0139” (specimen PV OR 28653): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/6b72d5a6-46ad-4314-9229-6ff6319acfa6). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_03_0139” (specimen PV OR 28655): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/6b72d5a6-46ad-4314-9229-6ff6319acfa6). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_21_0267” (specimen PV R 1485): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/887e9c7d-df4e-4643-b225-e7d9b871b628). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_21_0341” (specimen PV R 1870): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/e4175b0d-aaed-4512-a821-f1e25d302a91). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHM-UK_P_DF118_03_21_0501” (specimen PV R 2565): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/8e3b1bb0-a054-47c6-b0b6-2e1c1755acbe). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010035495_L010093866” (specimen PV OR 28626): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/06f68b70-9128-4788-9f65-e8b81a45ccd6). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010035495_L010093866_(1)” (specimen PV OR 28626): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/ec695326-d85d-421c-8b7d-9eb221cb54c0). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010028610_L010093342” (specimen PV OR 28646): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/b19e5297-d98c-4dc5-93fb-31e05d956437). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010029498_L010093348” (specimen PV OR 28653): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/57760488-d079-4ceb-bb11-50c5db0cc7da). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010029498_L010093348_(1)” (specimen PV OR 28653): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/12a51cfd-66db-4136-8fac-336490b47314). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010030354_L010220972” (specimen PV OR 28655): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/6810935e-8808-40e2-a1da-3bf5e3a7850f). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010039312_L010093348” (specimen PV R 1485): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/bd60687e-b4dd-4107-a8bb-b9c54e6b342d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “010036837_L010093345” (specimen PV R 2565): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/18aac293-0fdf-4e25-b9e1-0a1e3054d87d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n- “NHMUK PV R 2565 Pelorosaurus teeth gallery label” (specimen PV R 2565): The Trustees of the Natural History Museum, London; via NHM Data Portal (https://data.nhm.ac.uk/media/393cfce1-bc47-40f8-8df7-1dbf2c50417d). [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/).\n\n### Scientific references\n\n86 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": "G. A. Mantell (1850). On the Pelorosaurus; an undescribed gigantic terrestrial reptile, whose remains are associated with those of Iguanodon and other saurians in the strata of the Tilgate Forest, in Sussex. Philosophical Transactions of the Royal Society of London 140(16): 379–390.",
    "authors": "G. A. Mantell",
    "year": 1850,
    "title": "On the Pelorosaurus; an undescribed gigantic terrestrial reptile, whose remains are associated with those of Iguanodon and other saurians in the strata of the Tilgate Forest, in Sussex",
    "publication": "Philosophical Transactions of the Royal Society of London",
    "volume": "140",
    "issue": "16",
    "pages": "379–390",
    "doi": "10.1144/gsl.jgs.1850.006.01-02.29",
    "url": "https://doi.org/10.1144/gsl.jgs.1850.006.01-02.29",
    "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 (Mantell 1850)."
      ]
    },
    "source": "pbdb",
    "source_name": "Paleobiology Database",
    "license_id": "CC-BY-4.0",
    "pbdb_reference_no": "19872"
  },
  "summary": "Omnisaura summary: Pelorosaurus, Mantell 1850\n\n- Named by: Mantell 1850 (medium confidence: only PBDB gives this; nothing contradicts it).\n- Order: Saurischia (medium confidence: only NHM gives this; nothing contradicts it).\n- Parent group: Titanosauriformes (medium confidence: only PBDB gives this; nothing contradicts it).\n- Type species: Pelorosaurus conybeari (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, as published by the Paleobiology Database: Tithonian to Albian, 145.06–110.1 million years ago (low confidence: sources disagree and an editor has not ruled yet).\n- Age, Omnisaura's own calculation (not a published figure): 137.05–125.77 million years ago (low confidence: Omnisaura's calculation from only 1 dated record(s)).\n- Fossils found in: United Kingdom (high: NHM and PBDB both record it); France (low: only one PBDB record).\n- Rock formations: Ashdown Formation (low: only NHM gives this name and it matches no PBDB formation; awaiting an editor); Kimmeridge Clay Formation (low: only NHM gives this name and it matches no PBDB formation; awaiting an editor); Tunbridge Wells Sand Formation (low: only one PBDB record).\n- Original description: G. A. Mantell (1850). On the Pelorosaurus; an undescribed gigantic terrestrial reptile, whose remains are associated with those of Iguanodon and other saurians in the strata of the Tilgate Forest, in Sussex. Philosophical Transactions of the Royal Society of London 140(16): 379–390. https://doi.org/10.1144/gsl.jgs.1850.006.01-02.29 (medium confidence: only PBDB gives this; its author and year match the naming authority (Mantell 1850)).\n\nNot known or disputed:\n- Age: sources disagree (PBDB says 145.06–110.1 Ma; NHM specimens says 154.8–113.2 Ma). Awaiting an Omnisaura editor.\n- Formations: sources disagree (NHM says Ashdown Formation). Awaiting an Omnisaura editor.\n- Formations: sources disagree (NHM says Kimmeridge Clay Formation). Awaiting an Omnisaura editor.\n- Family: no source Omnisaura uses gives this.\n- Common names: no source Omnisaura uses gives this.\n- Named after: no source Omnisaura uses gives this.\n- 1 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)."
}