Caenagnathasia: Research Database
Caenagnathidae (Oviraptorosauria: Theropoda) · Late Cretaceous (~70 MYA) · Asia — Uzbekistan (Bissekty Formation)
Research Note: Caenagnathasia martinsoni was one of the smallest known oviraptorosaurians and the earliest known caenagnathid, from the Late Cretaceous Bissekty Formation of Uzbekistan. Its name means “recent jaw from Asia”.
| Research Finding | Status | Grade | Year | Method | Citation | Impact |
|---|---|---|---|---|---|---|
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Sues & Averianov 2014: Caenagnathasia from the Bissekty Formation
Sues & Averianov 2014 provide a comprehensive description of Caenagnathasia martinsoni, documenting its small body size, jaw morphology, and caenagnathid affinities from the Late Cretaceous of Uzbekistan
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Confirmed | A | 2014 | Fossil | Sues & Averianov, Cretaceous Research | Taxonomy |
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Frey & Martill 1995: First occurrence of Caenagnathasia from Uzbekistan
Frey & Martill 1995 document the first occurrence of a caenagnathid from the Cretaceous of Uzbekistan, establishing the presence of this group in the Asian Late Cretaceous fauna
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Confirmed | A | 1995 | Fossil | Frey & Martill, Neues Jahrbuch für Geologie und Paläontologie | Diversity |
Active Debate: Caenagnathid Systematics and Early Evolution of Oviraptorosaurians
Whether Caenagnathasia is the most basal caenagnathid or more closely related to Asian or North American forms is debated. Its small body size raises questions about the evolutionary history of caenagnathids.
What We Still Do Not Know About Caenagnathasia
- Complete skeletal morphology: Known from jaw and mandible.
- Diet: Inferred from jaw morphology.
- Feather integration: Unknown.
- Social behavior: No direct evidence.
In Depth
For a long time Caenagnathasia has been known from only jaw material, and even with the subsequent discovery of an upper leg bone and vertebrae, not much is known about this dinosaur. Two facts can however be established about Caenagnathasia. First, Caenagnathasia is one of if not the smallest oviraptosaur currently known. Second, Caenagnathasia is also one of earliest oviraptosaurs to appear in the fossils record.
Further Reading
- New caenagnathid (Dinosauria, Theropoda) specimens from the Upper Cretaceous of North America and Asia. - Canadian Journal of Earth Sciences 30(10-11):2255-2272. - P. J. Currie, S. J. Godfrey & L. Nessov - 1994.
