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Article: Boreognathus pogorevichi, a remarkable new polychaete annelid from the lower Permian of the Pechora Basin, Russia

Papers in Palaeontology - Volume 8 - Cover
Publication: Papers in Palaeontology
Volume: 8
Part: 5
Publication Date: 2022
Article number: e1461
Author(s): Dmitry E. Shcherbakov, Alexander B. Tzetlin, and Andrey Yu. Zhuravlev
DOI: 10.1002/spp2.1461
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How to Cite

SHCHERBAKOV, D.E., TZETLIN, A.B., ZHURAVLEV, A.Y. 2022. Boreognathus pogorevichi, a remarkable new polychaete annelid from the lower Permian of the Pechora Basin, Russia. Papers in Palaeontology, 8, 5, e1461. DOI: https://doi.org/10.1002/spp2.1461

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Abstract

Abstract The sclerotized jaw elements (scolecodonts) of polychaete annelids are rarely preserved as articulated jaw apparatuses. Here we describe a morphologically unusual, rather large, and symmetrical jaw apparatus, assigned to the new taxon Boreognathus pogorevichi gen. et sp. nov., from the Kungurian (lower Permian) of the Pechora Coal Basin, northern Cis-Urals, Russia. Whereas the specimen is mainly preserved as a three-dimensional external mould of the near-complete dorsal maxillary apparatus, some organic matter comprising the original jaw wall is also retained. The new taxon combines edentate, pincer-like first maxillae (MI) typical of the extant Labidognatha apparatus type with long slender carriers common in the Prionognatha type. Unlike the smooth MI, MII are consistently and prominently denticulated. The new genus represents a hitherto unknown type of polychaete jaw apparatus and is assigned to the Palaeozoic family Atraktoprionidae.
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