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Re: Juvenile hadrosaur scavenged by Squalicorax shark

Thomas R. Holtz, Jr. <tholtz@umd.edu> wrote:

> There were a number of Cretaceous sharks comparable in shape and size to
> modern pelagic predators. However, some of these were members of
> now-extinct clades upon which modern forms are convergent.

Some good references on this are:

Kriwet J, and Benton MJ (2004)  Neoselachian (Chondrichthyes,
Elasmobranchii) diversity across the Cretaceous-Tertiary boundary.
Palaeogeogr Palaeoclimatol Palaeoecol 214: 181-194.

Friedman, M and Sallan, LC, (2012)  Five hundred million years of
extinction and recovery: A phanerozoic survey of large-scale diversity
patterns in fishes.  Palaeontology 55: 707-742 doi:

The latter also includes a reconstruction of _Squalicorax_, as well as
the larger _Cretoxyrhina_, another extinct shark (neoselachian).