Redescription of tetrapod trackways from the Mississippian Mabou Group, Lepreau Falls, New Brunswick, Canada

Authors

  • Matthew R. Stimson New Brunswick Museum
  • Randall F. Miller New Brunswick Museum
  • Spencer G. Lucas New Mexico Museum of Natural History and Science
  • Adrian F. Park New Brunswick, Department of Energy and Mines, Geological Surveys Branch
  • Steven J. Hinds New Brunswick, Department of Energy and Mines, Geological Surveys Branch

DOI:

https://doi.org/10.4138/atlgeol.2016.001

Keywords:

Paleontology, ichnofossil, tetrapod, Matthewichnus

Abstract

Red-bed strata exposed at Lepreau Falls, southern New Brunswick, were originally interpreted as belonging to the Triassic Lepreau Formation. Poorly preserved tetrapod trackways within the strata were previously assigned to two ichnospecies; one to a new Triassic ichnospecies, Isocampe lepreauense Sarjeant and Stringer, and the other to Rhynchosauroides cf. R. franconicus (Heller). Both were attributed to reptiles. Subsequent mapping of the rocks and reassignment of the exposed strata at Lepreau Falls to the Mississippian Mabou Group prompted our re-examination of the trackway fossils. Isocampe lepreauense was described from a specimen block preserving three trackways and the original description was based on erroneous interpretation of extramorphological digit drags. Rhynchosauroides cf. R. franconicus was a tentative assignment in a letter accompanying a cast in the New Brunswick Museum, but was never formally published. We redescribe and re-interpret all the trackways as gait variations produced by temnospondyls, and most closely resemble the Carboniferous ichnotaxon Matthewichnus.

Author Biographies

Matthew R. Stimson, New Brunswick Museum

Geology and Palaeontology Section

Natural Science Department

New Brunswick Museum

Randall F. Miller, New Brunswick Museum

Geology and Palaeontology Section

Natural Science Department

New Brunswick Museum

Spencer G. Lucas, New Mexico Museum of Natural History and Science

New Mexico Museum of Natural History and Science

Adrian F. Park, New Brunswick, Department of Energy and Mines, Geological Surveys Branch

New Brunswick, Department of Energy and Mines, Geological Surveys Branch

Steven J. Hinds, New Brunswick, Department of Energy and Mines, Geological Surveys Branch

New Brunswick, Department of Energy and Mines, Geological Surveys Branch

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Published

2016-01-14

How to Cite

Stimson, M. R., Miller, R. F., Lucas, S. G., Park, A. F., & Hinds, S. J. (2016). Redescription of tetrapod trackways from the Mississippian Mabou Group, Lepreau Falls, New Brunswick, Canada. Atlantic Geoscience, 52, 001–019. https://doi.org/10.4138/atlgeol.2016.001

Issue

Vol. 52 (2016)

Section

Articles

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