Microvertebrates from the Silurian–Devonian boundary beds of the Eastport Formation, Maine, eastern USA
DOI :
https://doi.org/10.4138/atlgeol.2018.006Mots-clés :
Thelodonti, Acanthodii, paleobiogeography, Avalonia, biostratigraphyRésumé
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.
Téléchargements
Publié-e
Comment citer
Numéro
Rubrique
Licence
As of January 1, 2025, Atlantic Geoscience is adopting Creative Commons Attribution 4.0 International (CC BY 4.0) This license requires that reusers give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, even for commercial purposes.
Copyright to material published in Atlantic Geoscience is normally retained by the author. Alternate arrangements can be made on request for government employees.
Permission to use a single graphic for which the author owns copyright is considered “fair dealing” under the Canadian Copyright Act and “fair use” by the journal, and no other permission need be granted, subject to the image being appropriately cited in all reproductions. The same fair dealing/fair use policy applies to sections of text up to 100 words in length.
