Huabeisaurus

Huabeisaurus
	Skeletal reconstruction of Huabeisaurus allocotus
Temporal occurrence
	Upper Chalk
	100.5 to 66 million years
Locations
	China , Shānxī ( Huiquanpu formation );
Systematics
	Dinosaur (dinosauria)
	Lizard dinosaur (Saurischia)
	Sauropodomorpha
	Sauropods (Sauropoda)
	Titanosauriformes
	Huabeisaurus
Scientific name
	Huabeisaurus
	Pang & Cheng , 2000
Art
	Huabeisaurus allocotus;

Huabeisaurus is a genus of sauropod dinosaur from the Titanosauriformes group . So far, a relatively complete, but skullless skeleton with two teeth is known, which comes from the Upper Cretaceous China . Huabeisaurus was first scientifically described by Pang and Cheng in 2000. The only species is Huabeisaurus allocotus .

features

Different view of the skeleton

Like all sauropods, Huabeisaurus was a four-legged herbivore with a long neck and tail and a relatively small skull. It was a large sauropod with an estimated length of 20 meters and a height of 5 meters. As with many other neosauropods, the teeth were cone-shaped and have a long tooth crown that is about three times as long as the tooth root . The spinous processes of the cervical and dorsal vertebrae were relatively high, those of the cervical vertebrae were forked.

Huabeisaurus can be distinguished from other genera in particular by the ilium : the iliac shovel (the front area of this bone) is extremely deep dorsoventrally . As in other sauropods, the underside of the iliac shows two stalks pointing downwards: the "ischiadic peduncle" directed towards the ischium and the "pubic peduncle" directed towards the pubic bone. In Huabeisaurus, the foremost part of the iliac bone extends so far down that its lower edge is in line with these two stems.

Find and naming

The skeleton ( holotype , copy number HBV-20001) comes from rocks of the Upper Cretaceous of the Huiquanpu Formation in Tianzhen County in the Chinese province of Shānxī . The name Huabeisaurus is made up of Huabei , the Chinese name for the greater area of northern China, and sauros , the ancient Greek word for "lizard". The second part of the species name, allocotus , means "unusual" and indicates the special meaning of this sauropod.

Systematics

Initially, Pang and Cheng assigned Huabeisaurus to their own family , the Huabeisauridae - according to these researchers, this genus shows clear differences to other sauropod groups such as the Diplodocidae , the Titanosauridae and the Nemegtosauridae . However, Upchurch and colleagues (2004) show that it is a representative of the Titanosauriformes , and possibly a Titanosauria within this group . According to these researchers, however, it must be classified outside of the Lithostrotia (= Titanosauridae), since the anterior caudal vertebrae were not procoel (concave on the anterior side). Buffetaut (2002) assigned Huabeisaurus to the Nemegtosauridae, a group of derived (advanced) titanosaurs - other researchers disagree and point to the primitive features of this sauropod.

Individual evidence

↑ ^a ^b ^c Qiqing Pang, Zhengwu Cheng: A new family of sauropod dinosaur from the Upper Cretaceous of Tianzhen, Shanxi province, China. In: Acta Geologica Sinica. English edition. Vol. 74, No. 2, 2000, ISSN 1000-9515 , pp. 117-125, doi : 10.1111 / j.1755-6724.2000.tb00438.x .
^ ^A ^b Paul Upchurch , Paul M. Barrett , Peter Dodson : Sauropoda. In: David B. Weishampel , Peter Dodson, Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 259-324.
↑ Ben Creisler: Dinosauria Translation and Pronunciation Guide ( Memento of October 13, 2011 in the Internet Archive )
↑ Eric Buffetaut , Varavudh Suteethorn , Jean Le Loeuff, Gilles Cuny, Haiyan Tong, Sasidhorn Khansubha: A review of the sauropod dinosaurs of Thailand. In: Nopadon Mantajit, Somsak Potisat (Ed.): The Symposium on Geology of Thailand. August 26-31, 2002, Bangkok, Thailand. Department of Mineral Resources, Bangkok 2002, ISBN 974-7734-44-3 , pp. 95-101.
↑ Jeffrey A. Wilson: Redescription of the Mongolian Sauropod Nemegtosaurus mongoliensis Nowinski (Dinosauria: Saurischia) and comments on Late Cretaceous Sauropod diversity. In: Journal of Systematic Palaeontology. Vol. 3, No. 3, 2005, ISSN 1477-2019 , pp. 283-318, doi : 10.1017 / S1477201905001628 .

[pang2000-1] Qiqing Pang, Zhengwu Cheng: A new family of sauropod dinosaur from the Upper Cretaceous of Tianzhen, Shanxi province, China. In: Acta Geologica Sinica. English edition. Vol. 74, No. 2, 2000, ISSN 1000-9515 , pp. 117-125, doi : 10.1111 / j.1755-6724.2000.tb00438.x .

[dinosauria-2] A ^b Paul Upchurch , Paul M. Barrett , Peter Dodson : Sauropoda. In: David B. Weishampel , Peter Dodson, Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 259-324.

[creisler-3] Ben Creisler: Dinosauria Translation and Pronunciation Guide ( Memento of October 13, 2011 in the Internet Archive )

[buffetaut-4] Eric Buffetaut , Varavudh Suteethorn , Jean Le Loeuff, Gilles Cuny, Haiyan Tong, Sasidhorn Khansubha: A review of the sauropod dinosaurs of Thailand. In: Nopadon Mantajit, Somsak Potisat (Ed.): The Symposium on Geology of Thailand. August 26-31, 2002, Bangkok, Thailand. Department of Mineral Resources, Bangkok 2002, ISBN 974-7734-44-3 , pp. 95-101.

[wilson_05-5] Jeffrey A. Wilson: Redescription of the Mongolian Sauropod Nemegtosaurus mongoliensis Nowinski (Dinosauria: Saurischia) and comments on Late Cretaceous Sauropod diversity. In: Journal of Systematic Palaeontology. Vol. 3, No. 3, 2005, ISSN 1477-2019 , pp. 283-318, doi : 10.1017 / S1477201905001628 .