publication . Article . 2017

A new subspecies of the Late Devonian antiarchan fish Bothriolepis leptocheira from South Timan (Russia) and signs of biotic crisis near the Frasnian-Famennian boundary

Ervins Luksevics; Pavel Beznosov; Valdemārs Stūris;
Open Access
  • Published: 01 Mar 2017 Journal: Acta Palaeontologica Polonica, volume 62 (issn: 0567-7920, Copyright policy)
  • Publisher: Polska Akademia Nauk Instytut Paleobiologii (Institute of Paleobiology, Polish Academy of Sciences)
Abstract
The species of the Late Devonian, earliest Famennian placoderm fish Bothriolepis jeremejevi has been downranked to subspecies Bothriolepis leptocheira jeremejevi comb. nov. in a result of detailed morphological studies of the type specimens and abundant new material from the type locality of the Sosnogorsk Formation, South Timan, Komi Republic, Russia. This taxon closely resembles Bothriolepis leptocheira leptocheira from Scotland, B. leptocheira curonica from Latvia, and B. leptocheira ssp. from Severnaya Zemlya differing only in small deviations of the size, proportions and shape of some plates of the armour. The composition of vertebrate assemblages from Scot...
Persistent Identifiers
Subjects
free text keywords: Placodermi, diversity, variability, Devonian, Frasnian, Famennian, Russia, South Timan, Geology, Subspecies, Late Devonian extinction, Paleontology, Bothriolepis, biology.organism_classification, biology, Extinction event, Ecology, lcsh:Fossil man. Human paleontology, lcsh:GN282-286.7, lcsh:Paleontology, lcsh:QE701-760
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