Mosasaur ascending: the phylogeny of bends

Title

Mosasaur ascending: the phylogeny of bends

Creator

Rothschild B M; Martin L D

Publisher

Netherlands Journal of Geosciences-Geologie En Mijnbouw

Date

2005
2005-09

Description

Recognition of decompression syndrome-related pathology (in the form of avascular necrosis) reveals diving behaviour in mosasaurs. Macroscopic and radiologic examination was performed to identify linear bone death characteristic of avascular necrosis in vertebrae from the major North American and European collections. This survey of mosasaurs extends throughout most of their geographic and stratigraphic range and includes examples across their diversity. Avascular necrosis was invariably present in Platecarpus coryphaeus and P. ictericus, Tylosaurus proriger, Mosasaurus lemonnieri and M. conodon, Plioplatecarpus houzeaui and Pl. primaevus, Prognathodon giganteus, Hainosaurus bernardi and an as yet unnamed Antarctic mosasaur. The frequency of occurrence in a given genus was independent of geography, present equally in European and North American and in the Niobara and Selma chalks. It was invariably absent from Clidastes propython and C. liodontus, Ectenosaurus, Halisaurus and Kolposaurus. The bone pathology, avascular necrosis, has a characteristic distribution in seven genera and thirteen species of mosasaurs and is absent in five genera and seven species. It segregated according to diving habits, uniformly present in supposed deep divers and uniformly absent in the shallow-habitat group.

Subject

avascular necrosis; bends; deep; dives; Geology; mosasaurs; Platecarpus; shark; Tylosaurus

Format

Journal Article

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Rights

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Pages

341-344

Issue

3

Volume

84

Citation

Rothschild B M; Martin L D, “Mosasaur ascending: the phylogeny of bends,” NEOMED Bibliography Database, accessed March 1, 2021, https://neomed.omeka.net/items/show/6939.

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