Also known as Avicranium
Avicranium is a genus of extinct drepanosaur reptile known from the Chinle Formation of the late Triassic. The type species of Avicranium is Avicranium renestoi. "Avicranium" is Latin for "bird cranium", in reference to its unusual bird-like skull, while "renestoi" references Silvio Renesto, a paleontologist known for studies of Italian drepanosaurs.left|thumb|274x274px|AMNH FARB 30834, mostly obscured by rock.
Avicranium is a genus of extinct drepanosaur reptile known from the Chinle Formation of the late Triassic. The type species of Avicranium is Avicranium renestoi. "Avicranium" is Latin for "bird cranium", in reference to its unusual bird-like skull, while "renestoi" references Silvio Renesto, a paleontologist known for studies of Italian drepanosaurs.left|thumb|274x274px|AMNH FARB 30834, mostly obscured by rock.
== Discovery == The holotype and only known specimen of Avicranium is AMNH FARB 30834, a disarticulated skull attached to a few cervical (neck) vertebrae. This specimen hails from the Coelophysis (or Whitaker) quarry at Ghost Ranch in New Mexico, USA. This quarry belongs to the 'siltstone member' of the Chinle formation, which corresponds to the late Norian to early Rhaetian stages of the Triassic. Various unprepared blocks from this locality were excavated by American Museum of Natural History field parties during the 1940s. Long believed to only contain multiple specimens of the early dinosaur Coelophysis, these blocks are now known to contain a multitude of different Triassic reptiles. AMNH FARB 30834 was uncovered during the preparation of a block containing the holotype of Effigia okeeffeae, a large shuvosaurid pseudosuchian. Multiple other drepanosaur vertebrae and limb fragments have also been found in the block, although it is unclear whether they belong to the same specimen as AMNH FARB 308344.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).