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A tiny Triassic saurian from Connecticut and the early evolution of the diapsid feeding apparatus

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Listed:
  • Adam C. Pritchard

    (Yale University)

  • Jacques A. Gauthier

    (Yale University
    Yale University)

  • Michael Hanson

    (Yale University)

  • Gabriel S. Bever

    (Johns Hopkins University)

  • Bhart-Anjan S. Bhullar

    (Yale University
    Yale University)

Abstract

Following the Permo–Triassic Extinction, large-bodied diapsid reptiles—with a body length >1 m—rapidly expanded their ecological roles. This diversification is reflected in enormous disparity in the development of the rostrum and adductor chamber. However, it is unclear how marked the diversity of the feeding apparatus was in contemporary small-bodied diapsids. Here we describe the remarkably small skull (2.5 cm long) of a saurian reptile, Colobops noviportensis, gen. et sp. nov., from the Triassic New Haven Arkose of Connecticut, USA. The taxon possesses an exceptionally reinforced snout and strikingly expanded supratemporal fossae for adductor musculature relative to any known Mesozoic or Recent diapsid of similar size. Our phylogenetic analyses support C. noviportensis as an early diverging pan-archosaur. Colobops noviportensis reveals extraordinary disparity of the feeding apparatus in small-bodied early Mesozoic diapsids, and a suite of morphologies, functionally related to a powerful bite, unknown in any small-bodied diapsid.

Suggested Citation

  • Adam C. Pritchard & Jacques A. Gauthier & Michael Hanson & Gabriel S. Bever & Bhart-Anjan S. Bhullar, 2018. "A tiny Triassic saurian from Connecticut and the early evolution of the diapsid feeding apparatus," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03508-1
    DOI: 10.1038/s41467-018-03508-1
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