{
  "schema": "omnisaura.snapshot/v3",
  "uid": "omnisaura:profile:gorgosaurus",
  "genus": "Gorgosaurus",
  "data_as_of": "2026-10-10",
  "raw_run": "2026-10-10",
  "profile": {
    "name": {
      "value": "Gorgosaurus",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "authority": {
      "value": "Lambe 1914",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "type_species": {
      "value": "Gorgosaurus libratus",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "order": {
      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    },
    "family": {
      "value": "Tyrannosauridae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "parent_name": {
      "value": "Albertosaurinae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "headline": {
      "value": [
        83.6,
        66.0,
        "Campanian",
        "Maastrichtian"
      ],
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "evidence": {
      "value": [
        83.6,
        66.0
      ],
      "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",
        "US"
      ],
      "rule": "Union of all sources (ISO 3166)",
      "rule_id": "merge:union_iso3166",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "formations": {
      "value": [
        "Dinosaur Park",
        "Hell Creek Formation",
        "Judith River Formation",
        "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"
        }
      ]
    },
    "diet": {
      "value": "carnivore",
      "rule": "PBDB, inferred from a group the genus belongs to",
      "rule_id": "merge:inferred_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "life_habit": {
      "value": "ground dwelling, solitary",
      "rule": "PBDB, inferred from a group the genus belongs to",
      "rule_id": "merge:inferred_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "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"
    },
    "family": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only PBDB gives this; nothing contradicts it."
      ],
      "source": "PBDB"
    },
    "headline": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only PBDB gives this; nothing contradicts it."
      ],
      "source": "PBDB"
    },
    "evidence": {
      "level": "medium",
      "basis": "synthesis",
      "reasons": [
        "Omnisaura's calculation from 17 confirmed PBDB records."
      ]
    },
    "diet": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only PBDB gives this, and it infers it for the whole of Coelurosauria, the group this genus belongs to, not from this genus's own fossils."
      ],
      "source": "PBDB"
    },
    "life_habit": {
      "level": "low",
      "basis": "thin",
      "reasons": [
        "PBDB infers this way of life for the whole of Theropoda; behaviour is rarely known for one genus."
      ]
    },
    "countries": {
      "level": "medium",
      "basis": "items",
      "reasons": [
        "See each entry."
      ],
      "items": [
        {
          "value": "CA",
          "level": "medium",
          "basis": "single_source",
          "reasons": [
            "Only PBDB records it (13 records)."
          ],
          "source": "PBDB"
        },
        {
          "value": "US",
          "level": "medium",
          "basis": "single_source",
          "reasons": [
            "Only PBDB records it (4 records)."
          ],
          "source": "PBDB"
        }
      ]
    },
    "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 (12 records)."
          ],
          "source": "PBDB"
        },
        {
          "value": "Hell Creek Formation",
          "level": "low",
          "basis": "thin",
          "reasons": [
            "Only one PBDB record."
          ]
        },
        {
          "value": "Judith River Formation",
          "level": "medium",
          "basis": "single_source",
          "reasons": [
            "Only PBDB records it (2 records)."
          ],
          "source": "PBDB"
        },
        {
          "value": "Oldman",
          "level": "low",
          "basis": "thin",
          "reasons": [
            "Only one PBDB record."
          ]
        }
      ]
    }
  },
  "gaps": {
    "missing": [
      {
        "field": "order",
        "label": "Order",
        "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": "family",
        "label": "Family",
        "source": "PBDB"
      },
      {
        "field": "headline",
        "label": "Age (headline)",
        "source": "PBDB"
      },
      {
        "field": "diet",
        "label": "Diet",
        "source": "PBDB"
      }
    ],
    "disputed": [],
    "withheld": [
      {
        "records": "occurrences",
        "status": "tentative",
        "count": 3,
        "reason": "PBDB fossil records identified only tentatively (for example 'cf.', '?', or the genus name in quotation marks, PBDB's mark for a loose use)"
      }
    ]
  },
  "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"
  },
  "formation_matches": [
    {
      "name": "Hell Creek",
      "same_as": "Hell Creek Formation",
      "status": "automatic",
      "ruling": null
    },
    {
      "name": "Judith River",
      "same_as": "Judith River Formation",
      "status": "automatic",
      "ruling": null
    }
  ],
  "credits": {
    "genus": "Gorgosaurus",
    "scope": "confirmed matches only",
    "data_sources": [
      {
        "values": 3109,
        "retrieved": [
          "2026-10-04",
          "2026-10-05",
          "2026-10-10",
          "2026-10-11"
        ],
        "source": "pbdb",
        "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,
        "attribution": "Data from the Paleobiology Database (https://paleobiodb.org), licensed CC BY 4.0.",
        "source_name": "Paleobiology Database",
        "homepage": "https://paleobiodb.org"
      },
      {
        "values": 14,
        "retrieved": [
          "2026-10-04",
          "2026-10-05"
        ],
        "source": "nhm",
        "license_id": "CC0-1.0",
        "license_name": "Creative Commons Zero 1.0 (public domain dedication)",
        "license_url": "https://creativecommons.org/publicdomain/zero/1.0/",
        "requires_attribution": false,
        "attribution": "Natural History Museum (London) Data Portal, Collection specimens dataset, https://doi.org/10.5519/0002965. Image licenses vary per record.",
        "source_name": "Natural History Museum Data Portal",
        "homepage": "https://data.nhm.ac.uk"
      },
      {
        "values": 24,
        "retrieved": [
          "2026-10-10"
        ],
        "source": "wikidata",
        "license_id": "CC0-1.0",
        "license_name": "Creative Commons Zero 1.0 (public domain dedication)",
        "license_url": "https://creativecommons.org/publicdomain/zero/1.0/",
        "requires_attribution": false,
        "attribution": "Data from Wikidata (https://www.wikidata.org), CC0 1.0.",
        "source_name": "Wikidata",
        "homepage": "https://www.wikidata.org"
      }
    ],
    "images": [
      {
        "media_id": 2567,
        "title": "File:Drumheller 150.jpg",
        "category": "Taxon image",
        "url": "https://upload.wikimedia.org/wikipedia/commons/e/e6/Drumheller_150.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=original",
        "page_url": "https://commons.wikimedia.org/wiki/File:Drumheller_150.jpg",
        "source": "commons",
        "rights_holder": "Sebastian Bergmann from Siegburg, Germany",
        "catalog_number": null,
        "license_id": "CC-BY-SA-2.0",
        "license_name": "Creative Commons Attribution-ShareAlike 2.0",
        "license_url": "https://creativecommons.org/licenses/by-sa/2.0/",
        "requires_attribution": true,
        "share_alike": true,
        "attribution": "Sebastian Bergmann from Siegburg, Germany ([1]), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Drumheller_150.jpg)"
      },
      {
        "media_id": 2568,
        "title": "File:Gorgosaurus chasing Lambeosaurus.jpg",
        "category": "Taxon image",
        "url": "https://upload.wikimedia.org/wikipedia/commons/c/ce/Gorgosaurus_chasing_Lambeosaurus.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=original",
        "page_url": "https://commons.wikimedia.org/wiki/File:Gorgosaurus_chasing_Lambeosaurus.jpg",
        "source": "commons",
        "rights_holder": "ABelov2014",
        "catalog_number": null,
        "license_id": "CC-BY-3.0",
        "license_name": "Creative Commons Attribution 3.0",
        "license_url": "https://creativecommons.org/licenses/by/3.0/",
        "requires_attribution": true,
        "share_alike": false,
        "attribution": "ABelov2014 (https://www.deviantart.com/abelov2014/art/Pursuit-hunting-stories-865645803), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Gorgosaurus_chasing_Lambeosaurus.jpg)"
      }
    ],
    "derived_ages": null,
    "references": 152
  },
  "credits_markdown": "## Gorgosaurus: 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 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 10 October 2026. _Credited as a courtesy: this licence doesn't require attribution._\n\n### Images (2)\n- “File:Drumheller 150.jpg” (Taxon image): Sebastian Bergmann from Siegburg, Germany ([1]), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Drumheller_150.jpg). [Creative Commons Attribution-ShareAlike 2.0](https://creativecommons.org/licenses/by-sa/2.0/). Shown unmodified (share-alike licence).\n- “File:Gorgosaurus chasing Lambeosaurus.jpg” (Taxon image): ABelov2014 (https://www.deviantart.com/abelov2014/art/Pursuit-hunting-stories-865645803), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Gorgosaurus_chasing_Lambeosaurus.jpg). [Creative Commons Attribution 3.0](https://creativecommons.org/licenses/by/3.0/).\n\n### Scientific references\n\n152 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",
  "identifiers": [
    {
      "scheme": "pbdb",
      "name": "Paleobiology Database",
      "id": "53193",
      "url": "https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=53193"
    },
    {
      "scheme": "enwiki",
      "name": "Wikipedia (English)",
      "id": "Gorgosaurus",
      "url": "https://en.wikipedia.org/wiki/Gorgosaurus"
    },
    {
      "scheme": "gbif",
      "name": "GBIF",
      "id": "4966240",
      "url": "https://www.gbif.org/species/4966240"
    },
    {
      "scheme": "wikidata",
      "name": "Wikidata",
      "id": "Q40752",
      "url": "https://www.wikidata.org/wiki/Q40752"
    }
  ],
  "other_names": {
    "species": [
      "Gorgosaurus libratus",
      "Gorgosaurus sternbergi"
    ],
    "synonyms": []
  },
  "original_description": {
    "citation": "L. M. Lambe (1914). On a new genus and species of carnivorous dinosaur from the Belly River Formation of Alberta, with a description of the skull of Stephanosaurus marginatus from the same horizon. The Ottawa Naturalist 28: 13–20.",
    "authors": "L. M. Lambe",
    "year": 1914,
    "title": "On a new genus and species of carnivorous dinosaur from the Belly River Formation of Alberta, with a description of the skull of Stephanosaurus marginatus from the same horizon",
    "publication": "The Ottawa Naturalist",
    "volume": "28",
    "issue": null,
    "pages": "13–20",
    "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": "17547"
  },
  "summary": "Omnisaura summary: Gorgosaurus, Lambe 1914\n\n- Named by: Lambe 1914 (medium confidence: only PBDB gives this; nothing contradicts it).\n- Family: Tyrannosauridae (medium confidence: only PBDB gives this; nothing contradicts it).\n- Parent group: Albertosaurinae (medium confidence: only PBDB gives this; nothing contradicts it).\n- Type species: Gorgosaurus libratus (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, as published by the Paleobiology Database: Campanian to Maastrichtian, 83.6–66 million years ago (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, Omnisaura's own calculation (not a published figure): 83.6–66 million years ago (medium confidence: Omnisaura's calculation from 17 confirmed PBDB records).\n- Fossils found in: Canada (medium: only PBDB records it (13 records)); United States (medium: only PBDB records it (4 records)).\n- Rock formations: Dinosaur Park (medium: only PBDB records it (12 records)); Judith River Formation (medium: only PBDB records it (2 records)); Hell Creek Formation (low: only one PBDB record); Oldman (low: only one PBDB record).\n- Original description: L. M. Lambe (1914). On a new genus and species of carnivorous dinosaur from the Belly River Formation of Alberta, with a description of the skull of Stephanosaurus marginatus from the same horizon. The Ottawa Naturalist 28: 13–20. (medium confidence: only PBDB gives this; its author and year match the naming authority (Lambe 1914)).\n- Diet, inferred by PBDB for the group: carnivore (medium confidence: only PBDB gives this, and it infers it for the whole of Coelurosauria, the group this genus belongs to, not from this genus's own fossils).\n- Way of life, inferred by PBDB for the group: ground dwelling, solitary (low confidence: PBDB infers this way of life for the whole of Theropoda; behaviour is rarely known for one genus).\n\nNot known or disputed:\n- Order: 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- 3 record(s) left out: pBDB fossil records identified only tentatively (for example 'cf.', '?', or the genus name in quotation marks, PBDB's mark for a loose use).\n\nNot covered by Omnisaura: size, weight, appearance, or behaviour beyond the way of life PBDB infers for the group. 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)."
}