New ptyctodontid placoderm from the Famennian (Upper Devonian) of European Russia

Alexander Ivanov

doi:10.21638/spbu03.2022.401

Authors

Alexander Ivanov Institute of Earth Sciences, Saint Petersburg State University, 16 liniya V. O., 29, Saint Petersburg, 199178, Russian Federation; Kazan Federal University, ul. Kremlyovskaya, 4, Kazan, 420008, Russian Federation https://orcid.org/0000-0001-8671-6920

DOI:

https://doi.org/10.21638/spbu03.2022.401

Abstract

Neruchella eichwaldi gen. et sp. nov. is erected on the basis of a head shield found in the Famennian Lebedyanian Regional Stage of the Orel Region, Russia. The new taxon differs from all known ptyctodontids, and is characterized by the central plates in contact along the skull midline, the meeting of the sensory-line canals on the centrals and the loss of the nuchal plate. The structures of the head shields of two Famennian ptyctodontids Neruchella and Chelyophorus are completely different from the general skull bone pattern of older ptyctodontid taxa.

Keywords:

new genus, Ptyctodontida, Placodermi, Famennian, Devonian, Russia

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References

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