| |
| The perinate skull of Byronosaurus (Troodontidae) with observations on the cranial ontogeny of paravian theropods. (American Museum novitates, no. 3657) |
| |||||||||||
| Download Problems | |
| Title: | The perinate skull of Byronosaurus (Troodontidae) with observations on the cranial ontogeny of paravian theropods. (American Museum novitates, no. 3657) |
| Authors: | Bever, Gabe S. Norell, Mark. |
| Keywords: | Byronosaurus. Dinosaurs. Mongolia. Ukhaa Tolgod. Skull. |
| Issue Date: | 2009 |
| Series/Report no.: | American Museum novitates, no. 3657. |
| Abstract: | The skulls of two perinate paravians from Ukhaa Tolgod, Djadoktha Formation, Mongolia, are described here. The skulls are nearly unique in their combination of ontogenetic age and preservational quality and provide us with the first look at the morphology of such important anatomical regions as the rostrum, palate, and braincase at or near the onset of postnatal development in a nonavian paravian coelurosaur. Based on a number of derived characters, the skulls are allocated to a derived position within Troodontidae that is outside the clade consisting of Saurornithoides mongoliensis, Saurornithoides junior, Troodon formosus, and probably Sinornithoides youngi. A single synapomorphy, presence of a lateral maxillary groove, supports the Ukhaa perinates as Byronosaurus. The comparative morphology of the Ukhaa perinates with adult troodontids indicates a number of significant postnatal transformations (e.g., elongation and flattening of the rostrum, increase in the number of maxillary and ... |
| Description: | 51 p. : ill., 1 map ; 26 cm. "August 28, 2009." Includes bibliographical references (p. 46-50). |
| URI: | http://hdl.handle.net/2246/5980 |
| Department of Library Services
American Museum of Natural History Central Park West at 79th St., New York, NY 10024 © American Museum of Natural History, 2006 Powered by DSpace
|
||