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Re: Antarctic Elasmosaur

-----Original Message-----
From: Jaime A. Headden <qilongia@yahoo.com>
To: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Monday, February 25, 2002 10:19 PM
Subject: Antarctic Elasmosaur

>Not dinos, but of some particular interest tro many list members, as well
>as of ecological interest:
>Fostowicz-Frelik, £. and Ga?dzicki, A. 2001. Anatomy and histology of
>plesiosaur bones from the Late Cretaceous of Seymour Island, Antarctic
>Peninsula. In: A. Ga?dzicki (ed.), Palaeontological Results of the Polish
>Antarctic Expeditions. Part III. _Palaeontologia Polonica_ 60: 7?32.
>"Remains of elasmosaurid plesiosaur have been collected from the lower
>part of the Late Cretaceous López de Bertodano Formation on Seymour
>Island, Antarctica. This well preserved bone material includes pectoral,
>dorsal, and caudal vertebral centra, femur, tibia, and fragments of the
>humerus, scapula, and ischia, that most probably belong to the one
>specimen. The microstructure of the bone tissue shows rather dense
>structure with Haversian remodelling well underway and the areas of
>intensive growth, suggesting subadult stage of ontogeny. The dense
>pachyostotic character of the rib and girdle tissue, together with a
>relative small size of the bones (approximated length of the animal about
>two meters) may indicate that described material belongs to the not fully
>grown elasmosaur, which may have lived in shallow water environment. The
>studied remains share some similarities with those of Mauisaurus from the
>Maastrichtian of New Zealand ? in the articular surface of the vertebral
>centra and the shape of the tibia."

One wonders then, (well,...I wonder then), if a case couldn`t be made for
elasmosaurs being somewhat warm-blooded to be living in a Polar region?