{
  "id": 934504,
  "title": "A fossilized birth-death model for fossil records lacking sampled ancestors",
  "url": "https://urgent.news/2026/08/14/a-fossilized-birth-death-model-for-fossil-records-lacking-sampled",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-14T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.13.744712v1?rss=1"
  },
  "original_language": "en",
  "account": null,
  "summary": "Fossilized birth-death (FBD) models provide a powerful framework for estimating diversification from phylogenies that include fossil taxa. However, the original formulation makes a key assumption that sampled ancestors (k-type fossils) should be commonly observed. Beaulieu and O'Meara (2023) showed that this assumption is often violated in empirical datasets, where fossils are represented mostly…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}