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Shark-bitten protostegid turtles from the Upper Cretaceous Mooreville Chalk, Alabama

Published online by Cambridge University Press:  20 May 2016

Kenshu Shimada  and
G. E. Hooks III
Kenshu Shimada
Affiliation:
1Environmental Science Program and Department of Biological Sciences, DePaul University, 2325 North Clifton Avenue, Chicago, Illinois 60614, 2Sternberg Museum of Natural History, Fort Hays State University, Hays, Kansas 67601
G. E. Hooks III
Affiliation:
3Department of Natural Sciences, Longwood University, 201 High Street, Farmville, Virginia 23909,
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Extract

Protostegids are Cretaceous marine turtles. Fossil materials assignable to the family Protostegidae range from early Albian to Late Campanian in age and have been described from all continents except Antarctica (Hirayama, 1995). The group includes two gigantic forms, Archelon Wieland and Protostega Cope, that reached maximum carapace lengths in excess of 2 m and rank among the largest turtles that ever lived.

In this paper, we describe two specimens of Protostega gigas Cope housed in the Field Museum of Natural History (FMNH), Chicago, Illinois: FMNH P27452 and FMNH PR58. Both are from the Mooreville Chalk (Upper Santonian to Lower Campanian: Mancini et al., 1995) in Greene County, Alabama, and are noteworthy because they show tooth marks from at least one large shark. One of the specimens also exhibits five embedded teeth of the Late Cretaceous cretoxyrhinid shark Cretoxyrhina mantelli (Agassiz). This note constitutes the first report of protostegid turtles bitten by C. mantelli.

Type
Research Article
Information
Journal of Paleontology , Volume 78 , Issue 1 , January 2004 , pp. 205 - 210
Copyright
Copyright © The Paleontological Society 

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