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New Early Devonian (late Emsian) placoderms from Belarus

Published online by Cambridge University Press:  31 March 2020

Dmitry P. Plax  and
Michael J. Newman Open the ORCID record for Michael J. Newman [Opens in a new window]
Dmitry P. Plax
Affiliation:
Belarusian National Technical University (BNTU), Nezavisimosti Avenue, 65, 220013, Minsk, Republic of Belarus
Michael J. Newman*
Affiliation:
Vine Lodge, Vine Road, Johnston, Haverfordwest, Pembrokeshire, SA62 3NZ, United Kingdom
*
*Corresponding author
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Abstract

Four placoderm fishes are described from the Lepel Beds of the Vitebsk Regional Stage of the Lower Devonian (upper Emsian) of Belarus. Two forms are new (Stipatosteus svidunovitchi new genus, new species and Actinolepis zaikai new species) and the other two taxa are left in open nomenclature (Coccosteidae gen. indet. sp. indet.; Placodermi indet. 1). Specimens of all four forms consist of disarticulated, mostly well-preserved plates (some are worn at the edges) originating from the cores of six boreholes. Additionally, the paper presents data on organic remains with the placoderms. A detailed lithological description of the enclosing rocks and a taphonomic description of the ichthyofauna are also provided. The 2010 Stratigraphic Chart of the Devonian deposits of Belarus was used as the stratigraphic basis. The presence of the genus Actinolepis Agassiz, 1844 in these deposits as well as in the Emsian of the Baltic region and Spitsbergen suggests a regional paleogeographic connection at this time.

UUID: http://zoobank.org/368b44df-e9e9-417c-a0e0-f7e138b7f4ec

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Articles
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Journal of Paleontology , Volume 94 , Issue 4 , July 2020 , pp. 773 - 787
Copyright
Copyright © 2020, The Paleontological Society

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