{
  "citation": "Specimen Registry v0.0.7 (2026). Maintained by Michael Gonzalez with AI assistance. https://specimenregistry.org. Data licensed under CC BY 4.0.",
  "license": "https://specimenregistry.org/license",
  "version": "0.0.12-neon",
  "specimen": {
    "id": "sima-incisor",
    "site_id": "sima-de-los-huesos",
    "common_name": "Sima de los Huesos incisor (nuclear-DNA-yielding specimen #2)",
    "community_name": null,
    "catalog_number": "(extract from paper Methods)",
    "catalog_number_source_quote": null,
    "material_type": "incisor tooth",
    "taxonomic_assignment": "early Neanderthal lineage (Middle Pleistocene)",
    "taxonomic_assignment_source_quote": "Here we recover nuclear DNA sequences from two specimens, which show that the Sima de los Huesos hominins were related to Neanderthals rather than to Denisovans, indicating that the population divergence between Neanderthals and Denisovans predates 430,000 years ago.",
    "assignment_method": "aDNA-nuclear",
    "assignment_publication": "10.1038/nature17405",
    "provenance_publication": null,
    "stratigraphic_context": {
      "raw": "Sima de los Huesos, bone deposit at bottom of karst shaft; ~430 ka"
    },
    "stratigraphic_context_source_quote": null,
    "current_custody": null,
    "inferred_fields": null,
    "disputed_assignment": false,
    "verification_state": "pending-verification",
    "verification_notes": "Editorial pass 2026-07-26: source-locked quote from Meyer 2016 abstract attached. Incisor specimen catalog number requires Methods/SI extraction. Note: the mtDNA result on this specimen clusters with Denisovans (discordant with nuclear assignment) — recorded on the mtDNA analysis row.",
    "fts_tsv": "'2':11A 'de':2A 'dna':8A 'earli':12B 'hueso':4A 'incisor':5A,17C 'lineag':14B 'los':3A 'middl':15B 'neanderth':13B 'nuclear':7A 'nuclear-dna-yield':6A 'pleistocen':16B 'sima':1A 'specimen':10A 'tooth':18C 'yield':9A",
    "created_at": "2026-07-26T18:17:01.609Z",
    "updated_at": "2026-07-26T18:17:01.609Z"
  },
  "site": {
    "id": "sima-de-los-huesos",
    "name": "Sima de los Huesos",
    "country": "Spain",
    "region": "Sierra de Atapuerca, Burgos Province",
    "latitude": "42.352220",
    "longitude": "-3.518330",
    "coordinates_precision": "10km",
    "site_type": "karst shaft (vertical bone-accumulation pit)",
    "excavating_institution": "Centro UCM-ISCIII de Evolución y Comportamiento Humanos, Madrid",
    "notes": null,
    "verification_state": "pending-verification",
    "created_at": "2026-07-26T18:17:01.609Z",
    "updated_at": "2026-07-26T18:17:01.609Z"
  },
  "analyses": [
    {
      "id": "1ae168ac-22a9-45be-a96e-fa0a37121906",
      "publication_id": "10.1038/nature17405",
      "method": "aDNA-mitochondrial",
      "dating_method": null,
      "lab": "Max Planck Institute for Evolutionary Anthropology, Leipzig",
      "analysis_date": "2016-01-01T00:00:00.000Z",
      "result_summary": "mtDNA recovered from one Sima specimen clusters with Denisovan mtDNAs (matching the prior Meyer 2014 Sima femur result), preserving the paradox that Sima nuclear DNA is Neanderthal but mtDNA is Denisovan-like — the paper interprets this as a later mtDNA gene-pool turnover in the Neanderthal lineage.",
      "result_summary_source_quote": null,
      "verification_state": "draft"
    }
  ],
  "comparisons": []
}