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Ankylosaur ossicles from Cenomanian of Northwestern Alberta



From: Ben Creisler
bcreisler@gmail.com

New in PLoS ONE:

Michael E. Burns & Matthew J. Vavrek (2014)
Probable Ankylosaur Ossicles from the Middle Cenomanian Dunvegan
Formation of Northwestern Alberta, Canada.
PLoS ONE 9(5): e96075.
doi:10.1371/journal.pone.0096075
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0096075

A sample of six probable fragmentary ankylosaur ossicles, collected
from Cenomanian deposits of the Dunvegan Formation along the Peace
River, represent one of the first dinosaurian skeletal fossils
reported from pre-Santonian deposits in Alberta. Specimens were
identified as ankylosaur by means of a palaeohistological analysis.
The primary tissue is composed of zonal interwoven structural fibre
bundles with irregularly-shaped lacunae, unlike the elongate lacunae
of the secondary lamellar bone. The locality represents the most
northerly Cenomanian occurrence of ankylosaur skeletal remains.
Further fieldwork in under-examined areas of the province carries
potential for additional finds.