Caenagnathasia

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Caenagnathasia
Temporal range:
Ma
Illustration of the lower jaw
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: †Caenagnathidae
Subfamily: †
Elmisaurinae
Genus: †Caenagnathasia
Currie et al., 1994
Species:
†C. martinsoni
Binomial name
†Caenagnathasia martinsoni
Currie et al., 1994

Caenagnathasia ('recent jaw from

theropod from the Late Cretaceous of Uzbekistan
.

Discovery

The

dentary, and a femur.[2]

Description

Caenagnathasia is the smallest known oviraptorosaur and one of the smallest non-avian dinosaurs. The jaw fragments are only a few centimetres long and total skull length has been estimated at 3 inches (7.6 cm). A 2010 estimate by Gregory S. Paul gave it a length of 2 feet (0.61 m) and a weight of 3 pounds (1.4 kg).[3] Caenagnathasia would presumably have resembled other oviraptorosaurs, which were feathered, bird-like dinosaurs with beaked skulls, long necks, and long limbs. Recent studies suggest it was one of the more primitive members of the Caenagnathidae.

Classification

Caenagnathasia was originally assigned to the Caenagnathidae. It was even included in the definition of that clade published by Hans-Dieter Sues.[4] It has been suggested however, that it might have a more basal position in the Oviraptorosauria, outside of the Caenagnathoidea.[5] In 2015 after the description of new material, it was found that Caenagnathasia could confidently be referred to Caenagnathidae.[2]

Life restoration with purely hypothetical ecology

The below cladogram is based on that resolved in the description of

Anzu.[6]

Caenagnathoidea
Caenagnathidae

Microvenator celer

Gigantoraptor erlianensis

Caenagnathasia martinsoni

Alberta dentary morph 3

Leptorhynchos gaddisi

"Caenagnathus" sternbergi

Anzu wyliei

Caenagnathus collinsi

Oviraptoridae

See also

References

  1. doi:10.1139/e93-196
    .
  2. ^
    doi:10.1016/j.cretres.2014.12.001
    .
  3. ^ Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 152
  4. ^ Sues, Hans-Dieter (1997). "On Chirostenotes, a Late Cretaceous oviraptorosaur (Dinosauria: Theropoda) from western North America". Journal of Vertebrate Paleontology. 17 (4): 698–716.
  5. ^ Holtz, Thomas R. Jr. (2010) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2010 Appendix.
  6. PMID 24647078
    .

External links
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