A new basal coelurosaur (Dinosauria: Theropoda) from the Middle Jurassic of Siberia-Reference-Cited by-同舟云学术

A new basal coelurosaur (Dinosauria: Theropoda) from the Middle Jurassic of Siberia

Published:2010-03-25 Issue:1 Volume:314 Page:42-57
ISSN:0206-0477
Container-title:Proceedings of the Zoological Institute RAS
language:ru
Short-container-title:Proceedings ZIN

Author:

Averianov A.O.¹,Krasnolutskii S.A.²,Ivantsov S.V.³

Affiliation:

1. Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb. 1, 199034 Saint Petersburg, Russia

2. Sharypovo Regional Museum, 2nd microrayon 10, Sharypovo, 662311 Krasnoyarsk Territory, Russia

3. Department of Palaeontology and Historical Geology, Geological-Geographical Faculty, Tomsk State University, Lenina Pr. 36, 634050 Tomsk, Russia

Abstract

Kileskus aristotocus gen. et sp. nov. from the Middle Jurassic (Bathonian) Itat Formation at Berezovsk Quarry, Krasnoyarsk Territory (West Siberia, Russia), is based on an associated maxilla and premaxilla, a mandible fragment, and some possible associated postcranial elements. Kileskus gen. nov. is referred together with the Middle Jurassic Proceratosaurus from England and the Late Jurassic Guanlong from China to Proceratosauridae fam. nov. (Tyrannosauroidea, Coelurosauria) which is characterized by sagittal nasal crest (unknown for Kileskus gen. nov.), enlarged external nares, short ventral margin of premaxilla, and depth of the antorbital fossa ventral to the antorbital fenestra that is much greater than the depth of the maxilla below the ventral margin of the antorbital fossa. Kileskus gen. nov. is more similar to Proceratosaurus than to Guanlong in having anterodorsal process of the premaxilla inclined slightly anterodorsally and nares inclined posterodorsally, but differs from these two genera by having ascending process of the maxilla confluent with anterior rim of maxillary body and gently sloping posterodorsally. Kileskus gen. nov. has a basal position within the Proceratosauridae. Dilong from the Early Cretaceous of China with a parasagittal nasal crests is the sister taxon for the Proceratosauridae. The new taxon is one of the oldest members of Coelurosauria and Tyrannosauroidea in the fossil record.

Publisher

Zoological Institute of the Russian Academy of Sciences

Subject

Insect Science,Animal Science and Zoology,Aquatic Science,Ecology, Evolution, Behavior and Systematics

Reference38 articles.

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