Microvertebrates from the Silurian–Devonian boundary beds of the Eastport Formation, Maine, eastern USA

Keywords: Thelodonti, Acanthodii, paleobiogeography, Avalonia, biostratigraphy

Abstract

Agnathan and gnathostome remains, associated with lingulid brachiopod fragments and distinctive ostracods, have been extracted from a small calcareous mudstone sample collected from the type section of the Eastport Formation on the northern shore of Moose Island, Maine. The vertebrate assemblage includes osteostracan, anaspid, and thelodont scales, and acanthodian scales, spines and teeth, which support a late Pridoli, or possibly earliest Lochkovian, age for the stratum. The thelodont Paralogania denisoni n. sp. is described, associated with a single thelodont scale referred tentatively to Talivalia? sp. indet., and acanthodians Nostolepis striata, Gomphonchus sandelensis, andPoracanthodes punctatus in a fauna that shows similarities to late Pridoli assemblages in Britain, parts of Europe, Russia, Greenland, and arctic Canada.

Author Biography

Carole J. Burrow, Queensland Museum

Geosciences

Honorary Research Fellow

Published
2018-06-15
How to Cite
Turner, S., & Burrow, C. J. (2018). Microvertebrates from the Silurian–Devonian boundary beds of the Eastport Formation, Maine, eastern USA. Atlantic Geology, 54, 171 - 187. https://doi.org/10.4138/atlgeol.2018.006
Section
Articles