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Shark-Bitten Hesperornithiform (1 Viewer)

Fred Ruhe

Well-known member
Netherlands
Kenshu Shimada and H. Douglas Hanks, 2020

Shark-Bitten Hesperornithiform Bird Bone from a Turonian (Upper Cretaceous) Marine Deposit of Northeastern South Dakota, U.S.A.

Transactions of the Kansas Academy of Science 123(3-4): 414-418
doi: https://doi.org/10.1660/062.123.0310
https://bioone.org/journals/transac...n-Upper-Cretaceous/10.1660/062.123.0310.short

Abstract:

In this paper, a shark-bitten partial tibiotarsus of a hesperornithiform bird is described from the Upper Cretaceous of Grant County, South Dakota, U.S.A. Whether the bite marks represent a predatory attack or scavenging is uncertain, but they are attributed to an anacoracid shark, Squalicorax cf. S. falcatus. The specimen is significant because it further indicates that hesperornithiform birds were common food sources for carnivores in the Late Cretaceous Western Interior Seaway of North America, and that Squalicorax was a trophic generalist.

Enjoy,

Fred
 

Fred Ruhe

Well-known member
Netherlands
Figure 1. Shark-bitten partial tibiotarsus of hesperornithiform bird (SMM P2001.12.10) from the Turonian (Upper Cretaceous) of Grant County, South Dakota. A, entire specimen with a 1-cm scale bar with 1-mm increments; B, close-up view of presumed distal side (note multiple ‘cuts’ and serration marks made by a shark); C, close-up view of one set of serration marks.

Fred
 

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