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Morphological evidence for bipedalism in the Late Triassic prolacertiform reptileLangobardisaurus

  • Silvio Renesto
  • Fabio M. Dalla Vecchia
  • David Peters
Functional and Ecological Morphology

Abstract

Analysis of a newly discovered specimen of the Late Triassic prolacertiform reptileLangobardisaurus, along with further analyses of the postcranial skeletons of previously described specimens, suggests that a bipedal configuration without a parasagittal gait was possible during rapid locomotion, as previously suggested for the related genus,Macrocnemus, and also while standing and walking. Morphological evidence and size-related criteria are consistent with a facultative digitigrade configuration while standing erect. The elongation of the neck, a hallmark of the prolacertiforms, may have assisted these efforts, as inChlamydosaurus, an extant facultatively bipedal lizard with a convergent morphology. This hypothesis should yield new insights into the mode of life ofLangobardisaurus and other prolacertiform sister taxa.

Key words

Langobardisaurus prolacertiformes (reptilia) late Triassic functional morphology Bipedal stance skeletal correlates 

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Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 2002

Authors and Affiliations

  • Silvio Renesto
    • 1
  • Fabio M. Dalla Vecchia
    • 2
  • David Peters
    • 3
  1. 1.Dipartimento di Scienze della TerraUniversità degli StudiMilanoItaly
  2. 2.Museo Paleontologico CittadinoMonfalconeItaly
  3. 3.David Peters StudioSt LouisUSA

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