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Currie, Godfrey, and Nessov, 1994
- Origin and Meaning of the Name:
Lat. Gr. caena- [Gr. kainos (recent or new)] + Gr. gnathos [jaw] + asia [Asia]; Lat. martinsoni (for [G. G.] Martinson) = "Martinson's Asian Caenagnathus."
- Age, Formation, and Locality:
Formation and Stratigraphy: the Bissekty Formation, lower levels; lower Upper Cretaceous.
Geography and Locality: at the Dzhyrakuduk locality in the Kyzyl Kum, north of Bukhara, in Bukhara, Uzbekistan.
Age: the late Turnonian [?], in the early Late Cretaceous.
CMGP 401/12457 -- anterior region of fused dentaries.
CMGP 402/12457 -- nearly complete right dentary, lacking ventral posterior process and anteriormost area of the symphysis.
Fig. 1: Recontrusted skull of Caenagnathasia
martinsoni (Currie et al., 1994).
a really small ( around 3 to 4 feet) theropod without teeth but with residual dental alveoli. An oviraptorosaur with a fluted, somewhat denticulate and highly externally foramenated dentary, deep dorsal posterior process, a prearticular that does not extend to the symphysis, and a relatively deep splenial not ventrally displaced.
The geographically oldest secure oviraptorosaur, the primitiveness of the lower jaw shows that Caenagnathasia is near to the ancestral base of the oviraptorosaur family tree. The jaw itself would seem to bear the most similarity to Chirostenotes (Caenagnathidae), but this appears to be due to relative gross morphology of the dentary itself, and the relatively derived condition of the oviraptorid jaws. There are, in fact, more dissimilarities between Caenagnathasia to either caenagnathids or oviraptorids than there are similarities to both or either of those groups, suggesting Caenagnathasia is more primitive than either group.
The shape of the jaw gives Caenagnathasia a short, snub-nosed face, and size, as with all small animals, givng it large eyes for its small size. However, comparative to the caenagnathids and oviraptorids, the skull would not have been overly large for the body, and the body itself would have been relatively slender. The animal would superficially resemble Microvenator, as well as caenagnathids, in the relative short arms, slender build, etc.
- Barsbold R. 1983a. Khishchnyye dinosavry mela Mongolii. [Carnivorous dinosaurs from the Cretaceous of Mongolia.]. Trudy--Sovmestnaya Rossiysko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 19: 1-120. [in Russian, w/ English summary].
- Currie, P.J.; Godfrey, S.J.; and Nesov, L.A. 1994. New caenagnathid (Dinosauria: Theropoda) specimens from the Upper Cretaceous of North America and Asia. Canadian Journal of Earth Sciences 30: 2255-2272. [Issue printed with "1993" as the date, but published in 1994. w/ Russian and Chinese abstracts].
- Makovicky, P.J. and Sues, H.-D. 1998. Anatomy and phylogenetic relationships of the theropod dinosaur Microvenator celer from the Lower Cretaceous of Montana. American Museum Novitates 3240: 27 pp.
- Sternberg, R.M. 1940. A toothless bird from the Cretaceous of Alberta. Journal of Paleontology 14: 81-85.
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