First records of a plesiosaurian (Reptilia: Sauropterygia) and an ichthyosaur (Reptilia: Ichthyosauria) from Yukon, Canada

An isolated centrum collected ex situ from marine shales of the Lower Cretaceous (Albian) Arctic Red Formation along the Road River represents the first documented occurrence of a plesiosaurian from Yukon. This centrum represents the northernmost occurrence of plesiosaurians in the Western Interior...

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Bibliographic Details
Published in:The Canadian Field-Naturalist
Main Authors: Campbell, J.A. (James A.), Schroder-Adams, C. (Claudia), Haggart, J.W. (James W.), Druckenmiller, P.S. (Patrick S.), Ryan, M.J. (Michael J.), Zazula, G.D. (Grant D.)
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
Albian
Arctic Red Formation
Early Cretaceous
Elasmosaurid
Garbutt Formation
Ichthyosaur
Marine reptile
Plesiosaurian
Western Interior Sea
Yukon
Arctic
Canada
Road River
Online Access:https://ir.library.carleton.ca/pub/23375
https://doi.org/10.22621/cfn.v127i3.1489
Description
Summary:An isolated centrum collected ex situ from marine shales of the Lower Cretaceous (Albian) Arctic Red Formation along the Road River represents the first documented occurrence of a plesiosaurian from Yukon. This centrum represents the northernmost occurrence of plesiosaurians in the Western Interior Sea of North America prior to the establishment of the first continuous seaway (Western Interior Seaway) connecting the Boreal and Tethyan seas. Additionally, this centrum is potentially the secondoldest elasmosaurid specimen known from North America. A second centrum, collected along the Beaver River, is likely derived from the Lower Cretaceous (Lower Albian) Garbutt Formation exposed farther upstream. It represents the first report of an ichthyosaur from Yukon. Additionally, six associated ribs collected from the Arctic Red

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