Conchoraptor

Chordata

Conchoraptor gracilis Temporal range: Late Cretaceous
Cast mounted in a nesting position
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	Dinosauria
Order:	Saurischia
Suborder:	Theropoda
Family:	†Oviraptoridae
Genus:	†Conchoraptor Barsbold, 1986
Species:	†C. gracilis
Binomial name
Conchoraptor gracilis Barsbold, 1986

Conchoraptor (meaning "conch plunderer") is a genus of oviraptorid dinosaur from the late Cretaceous Period of what is now Asia.

Description

Profile of Conchoraptor gracilis

Skull of Conchoraptor from the University of Alberta

Conchoraptor was a small dinosaur, only 1–2 meters (4–6 feet) in length.^[1] Unlike many other oviraptorids, Conchoraptor lacked a head crest.^[1] Like its relatives, it lacked teeth. Instead of teeth, oviraptorids had powerful beaks, possibly adapted to crushing mollusk shells.^[1] The skull of Conchoraptor was heavily pneumatised, with most of the bones hollow.^[2] Internal connections between both ears functioned as resonance chambers and improved hearing.^[3]

Discovery

When first discovered in the Red Beds of Hermiin Tsav of the Late Campanian Nemegt Formation by a Polish-Mongolian expedition in 1971,^[1] scientists believed that Conchoraptor was a juvenile Oviraptor and that the animal's missing crest would have begun to grow when the animal reaching sexual maturity.^[1] Further study of multiple skeletons showed that Conchoraptor belonged in a new genus.^[1] The hands of Conchoraptor were a major reason that scientists decided to split it off from Oviraptor.^[1] Anatomically the hands seemed to be an evolutionary intermediate between those of "Ingenia" and Oviraptor, making it obvious that this animal was not a member of a known species.^[1]

The type species of this new genus, Conchoraptor gracilis, was described and named by Barsbold, in 1986. The generic name is derived from Greek konkhè, "mussel", and Latin raptor, "plunderer".^[4] This name reflects Barsbold's hypothesis that oviraptorids, rather than preying primarily upon eggs as had been traditionally thought, may have been specialized to feed on mollusks.^[1] The specific name means "gracile" in Latin. The holotype is IGM 100/20, a partial skeleton with skull. Later about two dozen specimens were formally referred to the species.

Classification

Conchoraptor was by Barsbold assigned to the Oviraptoridae in 1986. Recent analyses show it was a member of the oviraptorid subfamily Ingeniinae.

See also

Dinosaurs portal

• Nemegt Formation

Related animals

• "Ingenia"

References

1. ^ ^{a b c d e f g h i} "Conchoraptor." In: Dodson, Peter & Britt, Brooks & Carpenter, Kenneth & Forster, Catherine A. & Gillette, David D. & Norell, Mark A. & Olshevsky, George & Parrish, J. Michael & Weishampel, David B. The Age of Dinosaurs. Publications International, LTD. p. 136. ISBN 0-7853-0443-6.
2. ^ Kundrat, M. 2007, "Avian-like attributes of a virtual brain model of the oviraptorid theropod Conchoraptor gracilis", Naturwissenschaften 94: 499-504
3. ^ Kundrat M. and Janacek, J., 2007, "Cranial pneumatization and auditory perceptions of the oviraptorid dinosaur Conchoraptor gracilis (Theropoda, Maniraptora) from the Late Cretaceous of Mongolia", Naturwissenschaften 94:769–778
4. ^ Rinchen Barsbold, 1986, "Raubdinosaurier Oviraptoren". In: Vorobyeva, E. I. (ed.), Herpetologische Untersuchungen in der Mongolischen Volksrepublik. Akademia Nauk SSSR. pp. 210-223