{
  "annotation_id": "f9db6304-fa1e-4bbc-a579-94ded1574b1c",
  "date_created": "2026-03-02T18:01:34.681000Z",
  "date_modified": "2026-03-02T18:01:34.681000Z",
  "file_hash": "7cea56d2884b71fc7ca5c98a176b9f0e641d16f248235b285b299d05f6ba5ef3",
  "private": false,
  "record": {
    "abstract": "Longevity of a taxonomic group is an important issue in understanding the\ndynamics of evolution. In this respect a key observation is that genera,\nfamilies or orders can each be assigned a characteristic average lifetime [Van\nValen, L., (1973) Evolutionary Theory 1, 1-30]. Using the fossil marine animal\ngenera database [Sepkoski, J.J.Jr. (2002) A Compendium of Fossil Marine Animal\nGenera, Bull. Am. Paleontol. 363, 563 pp.] we here examine key determinants for\nrobustness of a higher taxonomic group in terms of the characteristics of its\nconstituents. We find insignificant correlation between the size of an order\nand its stability against extinction, whereas we observe amazingly large\ncorrelation between the lifetime of an order and the lifetime of its\nconstituent genera.",
    "arxiv_id": "q-bio/0608033",
    "authors": [
      "Stefan Bornholdt",
      "Kim Sneppen",
      "Hildegard Westphal"
    ],
    "categories": [
      "q-bio.PE"
    ],
    "title": "Longevity of orders is related to the longevity of their constituent   genera rather than genus richness",
    "url": "https://arxiv.org/abs/q-bio/0608033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5aae5f61-f53f-4af7-a951-6ddd29fc8784",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}