[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Unescoceratops and Gryphognathus, new ceratopsians from Alberta



From: Ben Creisler
bscreisler@yahoo.com
 
Apologies if people already received this posting. I sent it yesterday but 
apparently it got lost in cyber space...
Two new ceratopsians, Unescoceratops koppelhusae and Gryphognathus morrisoni 
that won't be valid until 2012 publication: 
 
Michael J. Ryan, David C. Evans, Philip J. Currie, Caleb M. Brown & Don 
Brinkman ("2011" [2012])
New leptoceratopsids from the Upper Cretaceous of Alberta, Canada.
Cretaceous Research (advance online publication)
doi:10.1016/j.cretres.2011.11.018 
http://www.sciencedirect.com/science/article/pii/S0195667111001960
 

Two new leptoceratopsid neoceratopsians are described based on partial 
dentaries collected from the Dinosaur Park (Campanian) and Milk River 
(Santonian) formations of Alberta. The new Campanian taxon [Unescoceratops] has 
a unique dentary tooth shape not shared by other leptoceratopsid taxa, which 
has implications for the evolution of the Leptoceratopsidae. The Santonian 
specimen [Gryphognathus] represents the oldest known leptoceratopsid (~83 Ma), 
and probably represents the smallest adult-sized ceratopsian known from North 
America.
[taxa names added to abstract]