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

Atlantic Geology

Spencer G. Lucas²  Matthew R. Stimson³  Randall F. Miller³  Steven J. Hinds¹  Adrian F. Park¹ 

[1] New Brunswick, Department of Energy and Mines, Geological Surveys Branch;New Mexico Museum of Natural History and Science;New Brunswick Museum

关键词: Paleontology;    ichnofossil;    tetrapod;    Matthewichnus;   

DOI  :  

学科分类：地质学

来源: Atlantic Geoscience Society

【 摘 要 】

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.

【 授权许可】

Unknown