{
  "schema": "omnisaura.snapshot/v3",
  "uid": "omnisaura:profile:amargasaurus",
  "genus": "Amargasaurus",
  "data_as_of": "2026-10-11",
  "raw_run": "2026-10-11_2",
  "profile": {
    "name": {
      "value": "Amargasaurus",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "authority": {
      "value": "Bonaparte 1984",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "type_species": {
      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    },
    "order": {
      "value": null,
      "rule": null,
      "rule_id": null,
      "synthesis": false,
      "sources": []
    },
    "family": {
      "value": "Dicraeosauridae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "parent_name": {
      "value": "Dicraeosaurinae",
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "headline": {
      "value": [
        125.77,
        121.4,
        "Barremian",
        null
      ],
      "rule": "PBDB leads",
      "rule_id": "merge:lead_pbdb",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "evidence": {
      "value": [
        125.77,
        121.4
      ],
      "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": [
        "AR"
      ],
      "rule": "Union of all sources (ISO 3166)",
      "rule_id": "merge:union_iso3166",
      "synthesis": false,
      "sources": [
        {
          "source": "pbdb",
          "license": "CC-BY-4.0"
        }
      ]
    },
    "formations": {
      "value": [
        "La Amarga"
      ],
      "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": "herbivore",
      "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, gregarious",
      "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": [
        "La Amarga Formation"
      ],
      "rule": "Wikidata leads",
      "rule_id": "merge:lead_wikidata",
      "synthesis": false,
      "sources": [
        {
          "source": "wikidata",
          "license": "CC0-1.0"
        }
      ]
    }
  },
  "confidence": {
    "name": {
      "level": "high",
      "basis": "corroborated",
      "reasons": [
        "PBDB and Wikidata identify the same genus."
      ]
    },
    "authority": {
      "level": "low",
      "basis": "disputed",
      "reasons": [
        "PBDB and Wikidata agree on who named it but give years more than one apart; an editor has not ruled yet."
      ]
    },
    "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": "low",
      "basis": "thin",
      "reasons": [
        "Omnisaura's calculation from only 2 dated record(s)."
      ]
    },
    "named_after": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only Wikidata gives this; nothing contradicts it."
      ],
      "source": "Wikidata"
    },
    "diet": {
      "level": "medium",
      "basis": "single_source",
      "reasons": [
        "Only PBDB gives this, and it infers it for the whole of Sauropoda, 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 Sauropoda; behaviour is rarely known for one genus."
      ]
    },
    "countries": {
      "level": "medium",
      "basis": "items",
      "reasons": [
        "See each entry."
      ],
      "items": [
        {
          "value": "AR",
          "level": "medium",
          "basis": "single_source",
          "reasons": [
            "Only PBDB records it (2 records)."
          ],
          "source": "PBDB"
        }
      ]
    },
    "formations": {
      "level": "medium",
      "basis": "items",
      "reasons": [
        "See each entry."
      ],
      "items": [
        {
          "value": "La Amarga",
          "level": "medium",
          "basis": "single_source",
          "reasons": [
            "Only PBDB records it (2 records)."
          ],
          "source": "PBDB"
        }
      ]
    }
  },
  "gaps": {
    "missing": [
      {
        "field": "type_species",
        "label": "Type species",
        "note": "No source we use gives this yet."
      },
      {
        "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."
      }
    ],
    "single_source": [
      {
        "field": "parent_name",
        "label": "Parent group",
        "source": "PBDB"
      },
      {
        "field": "family",
        "label": "Family",
        "source": "PBDB"
      },
      {
        "field": "headline",
        "label": "Age (headline)",
        "source": "PBDB"
      },
      {
        "field": "named_after",
        "label": "Named after",
        "source": "Wikidata"
      },
      {
        "field": "diet",
        "label": "Diet",
        "source": "PBDB"
      }
    ],
    "disputed": [
      {
        "field": "authority",
        "label": "Authority",
        "note": "The sources agree on who named it but give different years.",
        "values": [
          {
            "source": "PBDB",
            "source_id": "pbdb",
            "value": "Bonaparte 1984"
          },
          {
            "source": "Wikidata",
            "source_id": "wikidata",
            "value": "Leonardo Salgado and José Bonaparte, 1991"
          }
        ]
      }
    ],
    "withheld": []
  },
  "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": [],
  "credits": {
    "genus": "Amargasaurus",
    "scope": "confirmed matches only",
    "data_sources": [
      {
        "values": 1008,
        "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": 30,
        "retrieved": [
          "2026-10-11"
        ],
        "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": 4365,
        "title": "File:Amargasaurus Reconstruction Fred Wierum.png",
        "category": "Taxon image",
        "url": "https://upload.wikimedia.org/wikipedia/commons/f/ff/Amargasaurus_Reconstruction_Fred_Wierum.png?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=original",
        "page_url": "https://commons.wikimedia.org/wiki/File:Amargasaurus_Reconstruction_Fred_Wierum.png",
        "source": "commons",
        "rights_holder": "Fred Wierum",
        "catalog_number": null,
        "license_id": "CC-BY-SA-4.0",
        "license_name": "Creative Commons Attribution-ShareAlike 4.0",
        "license_url": "https://creativecommons.org/licenses/by-sa/4.0/",
        "requires_attribution": true,
        "share_alike": true,
        "attribution": "Fred Wierum (Own work), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Amargasaurus_Reconstruction_Fred_Wierum.png)"
      },
      {
        "media_id": 4364,
        "title": "File:Amargasaurus1 Melb Museum email.jpg",
        "category": "Taxon image",
        "url": "https://upload.wikimedia.org/wikipedia/commons/d/d0/Amargasaurus1_Melb_Museum_email.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=original",
        "page_url": "https://commons.wikimedia.org/wiki/File:Amargasaurus1_Melb_Museum_email.jpg",
        "source": "commons",
        "rights_holder": "No machine-readable author provided. Casliber assumed (based on copyright claims).",
        "catalog_number": null,
        "license_id": "PD-SELF",
        "license_name": "Public domain (released by the author, Wikimedia Commons)",
        "license_url": "https://commons.wikimedia.org/wiki/Template:PD-self",
        "requires_attribution": false,
        "share_alike": false,
        "attribution": "No machine-readable author provided. Casliber assumed (based on copyright claims). (No machine-readable source provided. Own work assumed (based on copyright claims).), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Amargasaurus1_Melb_Museum_email.jpg)"
      }
    ],
    "derived_ages": null,
    "references": 54
  },
  "credits_markdown": "## Amargasaurus: 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- **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\n### Images (2)\n- “File:Amargasaurus Reconstruction Fred Wierum.png” (Taxon image): Fred Wierum (Own work), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Amargasaurus_Reconstruction_Fred_Wierum.png). [Creative Commons Attribution-ShareAlike 4.0](https://creativecommons.org/licenses/by-sa/4.0/). Shown unmodified (share-alike licence).\n- “File:Amargasaurus1 Melb Museum email.jpg” (Taxon image): No machine-readable author provided. Casliber assumed (based on copyright claims). (No machine-readable source provided. Own work assumed (based on copyright claims).), via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Amargasaurus1_Melb_Museum_email.jpg). [Public domain (released by the author, Wikimedia Commons)](https://commons.wikimedia.org/wiki/Template:PD-self).\n\n### Scientific references\n\n54 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": "53960",
      "url": "https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=53960"
    },
    {
      "scheme": "enwiki",
      "name": "Wikipedia (English)",
      "id": "Amargasaurus",
      "url": "https://en.wikipedia.org/wiki/Amargasaurus"
    },
    {
      "scheme": "gbif",
      "name": "GBIF",
      "id": "4822553",
      "url": "https://www.gbif.org/species/4822553"
    },
    {
      "scheme": "wikidata",
      "name": "Wikidata",
      "id": "Q18510922",
      "url": "https://www.wikidata.org/wiki/Q18510922"
    }
  ],
  "other_names": {
    "species": [
      "Amargasaurus cazaui"
    ],
    "synonyms": []
  },
  "original_description": {
    "citation": "J. F. Bonaparte (1984). I dinosauri dell’Argentina [. Sulle Orme dei Dinosauri: 125–143.",
    "authors": "J. F. Bonaparte",
    "year": 1984,
    "title": "I dinosauri dell’Argentina [",
    "publication": "Sulle Orme dei Dinosauri",
    "volume": null,
    "issue": null,
    "pages": "125–143",
    "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 (Bonaparte 1984)."
      ]
    },
    "source": "pbdb",
    "source_name": "Paleobiology Database",
    "license_id": "CC-BY-4.0",
    "pbdb_reference_no": "63573"
  },
  "summary": "Omnisaura summary: Amargasaurus, Bonaparte 1984\n\n- Named by: Bonaparte 1984 (low confidence: PBDB and Wikidata agree on who named it but give years more than one apart; an editor has not ruled yet).\n- Family: Dicraeosauridae (medium confidence: only PBDB gives this; nothing contradicts it).\n- Parent group: Dicraeosaurinae (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, as published by the Paleobiology Database: Barremian, 125.77–121.4 million years ago (medium confidence: only PBDB gives this; nothing contradicts it).\n- Age, Omnisaura's own calculation (not a published figure): 125.77–121.4 million years ago (low confidence: Omnisaura's calculation from only 2 dated record(s)).\n- Fossils found in: Argentina (medium: only PBDB records it (2 records)).\n- Rock formations: La Amarga (medium: only PBDB records it (2 records)).\n- Original description: J. F. Bonaparte (1984). I dinosauri dell’Argentina [. Sulle Orme dei Dinosauri: 125–143. (medium confidence: only PBDB gives this; its author and year match the naming authority (Bonaparte 1984)).\n- Diet, inferred by PBDB for the group: herbivore (medium confidence: only PBDB gives this, and it infers it for the whole of Sauropoda, 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, gregarious (low confidence: PBDB infers this way of life for the whole of Sauropoda; behaviour is rarely known for one genus).\n\nNot known or disputed:\n- Authority: sources disagree (PBDB says Bonaparte 1984; Wikidata says Leonardo Salgado and José Bonaparte, 1991). Awaiting an Omnisaura editor.\n- Type species: no source Omnisaura uses gives this.\n- Order: no source Omnisaura uses gives this.\n- Common names: no source Omnisaura uses gives this.\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): Paleobiology Database (CC-BY-4.0); Wikidata (CC0-1.0)."
}