Kazaklambia, new name for ‘Procheneosaurus’ convincens

[Ben Creisler <bcreisler@gmail.com>]

From: Ben Creisler
bcreisler@gmail.com

A new online paper:

Phil R. Bell & Kirstin S. Brink (2013)
Kazaklambia convincens comb. nov., a primitive juvenile lambeosaurine
from the Santonian of Kazakhstan.
Cretaceous Research (advance online publication)
http://dx.doi.org/10.1016/j.cretres.2013.05.003,
http://www.sciencedirect.com/science/article/pii/S0195667113000888
I

The holotype of ‘Procheneosaurus’ convincens, a juvenile
lambeosaurine, is the most complete hadrosaurid known from Kazakhstan.
North American species of Procheneosaurus are considered juveniles of
Corythosaurus, Hypacrosaurus, and Lambeosaurus, rendering the generic
name unusable. A replacement name, Kazaklambia convincens comb. nov.,
is herein proposed as this specimen is morphologically distinct from
other Eurasian taxa and known juvenile lambeosaurines at a similar
ontogenetic stage in having a prefrontal process of the postorbital
with a dorsal thickening forming a dome lateral to the frontal dome,
doming of the nasal anterodorsal to the orbit, and a frontal
length/width ratio <1. The juvenile status of Kazaklambia makes
phylogenetic placement difficult; however, morphometric and
morphological information (particularly in relation to the hollow
cranial crest and the length of the frontal) suggest a close
affiliation with the basal lambeosaurines Amurosaurus and
Tsintaosaurus, and support the hypothesis for an Asian origin for
Lambeosaurinae.