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1 March 2001 SWIMMING STYLES IN JURASSIC ICHTHYOSAURS
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Abstract
Postcranial axial anatomy of six Jurassic ichthyosaurs is described and used to define a generalized pattern of regional anatomy with four structural units (neck, trunk, tail stock, fluke). Functional interpretation of each unit predicts a generalized swimming mode that used a laterally compressed, laterally oscillating caudal fluke as the propulsive organ. Fluke displacement was accomplished by the undulation of a dorsoventrally compressed posterior tail stock acting on a stabilized anterior tail stock. The trunk was largely uninvolved in locomotion. Osteological predictors of postcranial flexibility in living aquatic axial locomotors are reviewed and used to identify the existence of a range of swimming styles within this generalized pattern among surveyed ichthyosaurs.
and EMILY A. BUCHHOLTZ "SWIMMING STYLES IN JURASSIC ICHTHYOSAURS," Journal of Vertebrate Paleontology 21(1), (1 March 2001). https://doi.org/10.1671/0272-4634(2001)021[0061:SSIJI]2.0.CO;2
Received: 12 January 2000; Accepted: 26 July 2000; Published: 1 March 2001
JOURNAL ARTICLE
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