{
  "taxon_key": "worms:2081",
  "slug": "worms-2081",
  "scientific_name": "Chaetognatha",
  "common_name": "arrow worms",
  "rank": "Phylum",
  "rank_order": 8,
  "taxonomic_status": "accepted",
  "status_checked": "2026-08-05",
  "parent_taxon_key": "worms:2",
  "lineage": {
    "kingdom": "Animalia",
    "phylum": "Chaetognatha",
    "class": null,
    "order": null,
    "family": null
  },
  "ids": {
    "worms_id": 2081,
    "itis_id": 158650,
    "gbif_id": null,
    "ncbi_id": null,
    "inat_id": null
  },
  "groups": [],
  "notes": "2026-08-05: itis_id 158650 via WoRMS external link",
  "direct": {
    "n_obs": 6937,
    "n_samples": 1818,
    "n_datasets": 2,
    "year_min": 1951,
    "year_max": 2026,
    "life_stages": []
  },
  "rollup": {
    "n_obs": 6937,
    "n_taxa": 1,
    "n_species": 0,
    "n_datasets": 2,
    "year_min": 1951,
    "year_max": 2026
  },
  "datasets": [
    {
      "dataset_key": "cce-lter_zooscan",
      "n_obs": 5932,
      "n_samples": 1483,
      "year_min": 2005,
      "year_max": 2026,
      "life_stages": [],
      "years": {
        "2005": 144,
        "2006": 304,
        "2007": 264,
        "2008": 256,
        "2009": 308,
        "2010": 288,
        "2011": 320,
        "2012": 216,
        "2013": 292,
        "2014": 272,
        "2015": 312,
        "2016": 240,
        "2017": 300,
        "2018": 308,
        "2019": 300,
        "2020": 236,
        "2021": 308,
        "2022": 204,
        "2023": 308,
        "2024": 316,
        "2025": 332,
        "2026": 104
      },
      "sources": [
        {
          "name": "Chaetognatha",
          "common_name": "chaetognatha",
          "code": "3",
          "ids": {
            "worms_id": 2081,
            "itis_id": null,
            "gbif_id": null
          },
          "flags": []
        }
      ]
    },
    {
      "dataset_key": "cce-lter_zoodb",
      "n_obs": 1005,
      "n_samples": 335,
      "year_min": 1951,
      "year_max": 2010,
      "life_stages": [],
      "years": {
        "1951": 57,
        "1953": 66,
        "1956": 30,
        "1966": 57,
        "1972": 42,
        "1974": 24,
        "1979": 33,
        "1980": 30,
        "1984": 27,
        "1986": 39,
        "1991": 84,
        "1995": 54,
        "1997": 36,
        "1998": 66,
        "1999": 6,
        "2008": 6,
        "2010": 6
      },
      "sources": [
        {
          "name": "Chaetognatha",
          "common_name": "CHAETOGNATHA",
          "code": "4",
          "ids": {
            "worms_id": 2081,
            "itis_id": null,
            "gbif_id": null
          },
          "flags": []
        }
      ]
    }
  ]
}