March 3, 2026

New Taxa of Spiriferids (Brachiopoda) from the Emsian (Lower Devonian) of North-East Eurasia

Key Points

New genera Trushelevia and Kirichkovia reveal distinct features of spiriferids.
Type species T. yania and K. sibirica were identified from the Late Emsian strata.
Valves consist of three layers, with the secondary layer containing microorganisms.
Findings enhance the understanding of brachiopod diversity during the Lower Devonian.

Abstract

New taxa of spiriferids are described from the Late Emsian of North-East Eurasia (Ulahan-Sis Ridge). These are the genus Trushelevia gen. nov. with the type species T. yania sp. nov. from the subfamily Delthyridinae Phillips, 1841 and the genus Kirichkovia gen. nov. with the type species K. sibirica sp. nov. from the subfamily Howellellinae Johnson et Hou, 1994. The valves of this species consist of three layers: primary, secondary and prismatic. The secondary layer is permeated with pores, with fossil microorganisms found within them.

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Cite This Study

Baranov et al. (Mon,) studied this question.

synapsesocial.com/papers/69a7669dbadf0bb9e87ddb5a https://doi.org/https://doi.org/10.1134/s0031030125600994

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