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1 September 2011 Locomotor Behavior in Early Reptiles: Insights from an Unusual Erpetopus Trackway
MASSIMO BERNARDI, MARCO AVANZINI
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Abstract

An Erpetopus trackway recorded in the Lower Permian Collio Formation (Orobic Alps, northern Italy) is investigated as a source of data to reconstruct ancestral patterns of locomotion in eureptiles. The inferred small-sized captorhinid-“protorothyridid” producer cut an inclined muddy surface dragging its front limb digits, tail, and belly on the ground. Integrating ichnological and anatomical data we suggest that small captorhinids (“protorothyridids”) locomotion was performed with an obligatory, rigid sprawling posture with the trunk only slightly lifted from the substrate in a low, sprawled ‘belly walk’.

The Paleontological Society
MASSIMO BERNARDI and MARCO AVANZINI "Locomotor Behavior in Early Reptiles: Insights from an Unusual Erpetopus Trackway," Journal of Paleontology 85(5), 925-929, (1 September 2011). https://doi.org/10.1666/10-080.1
Accepted: 1 February 2011; Published: 1 September 2011
JOURNAL ARTICLE
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