Anatomy and relationships of Gilmoreosaurus mongoliensis (Dinosauria, Hadrosauroidea) from the late Cretaceous of Central Asia

Title Variants

Alternative: Gilmoreosaurus mongoliensis

Related Titles

Series: American Museum novitates, no. 3694

By

Prieto-Márquez, Albert, 1974-

Norell, Mark A.
Olsen, George, 1874-1939
Central Asiatic Expeditions 1921-1930

Type

Book

Material

Published material

Publication info

[New York], American Museum of Natural History, c2010

Notes

Caption title.

"August 23, 2010."

"The first fossil remains of Gilmoreosaurus mongoliensis were collected in 1923 by George Olsen during the Central Asiatic Expeditions of the American Museum of Natural History ... from two quarries ... in the Upper Cretaceous Iren Dabasu Formation, Inner Mongolia, northern China"--P. 2.

The osteology of the hadrosauroid dinosaur Gilmoreosaurus mongoliensis is redescribed in detail based on the disarticulated cranial and postcranial elements of at least four individuals. These together constitute the lectotype and hypodigm of this species. The diagnosis is emended to include two autapomorphies (paddle-shaped postacetabular process that is less than 70% of the length of the iliac central plate and manual phalanx III-1 with greatly asymmetrical distal surface) and the unique combination of two iliac characters (presence of ischial tuberosity and supraacetabular process with apex located posterodorsal to ischial peduncle). The distinction of G. mongoliensis from B. johnsoni is confirmed on the basis of characters of the maxilla, dentition, ilium, ischium, and pubis. Maximum parsimony analysis places G. mongoliensis as a closely related outgroup to the Hadrosauridae, the sister taxon to the clade composed of all hadrosauroids closer to Telmatosaurus transsylvanicus than to Bactrosaurus johnsoni.

Subjects

Anatomy , China , Cretaceous , Dinosaurs , Gilmoreosaurus mongoliensis , Hadrosauridae , Inner Mongolia , Iren Dabasu Formation , Iren Dabasu Formation (China) , Paleontology , Phylogeny , Reptiles, Fossil

Call Number

QL1 .A436 no.3694 2010

Language

English

Identifiers

OCLC: 657648756