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Gilmoreosaurus redescribed

Prieto-Márquez, A. & M.A. Norell, 2010.  Anatomy and Relationships of 
_Gilmoreosaurus mongoliensis_ (Dinosauria: Hadrosauroidea) from the Late 
Cretaceous of Central Asia.  American Museum Novitates 3694: 1-49.

Abstract: 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_.