New and revised taxa of Carboniferous spiriferides (Brachiopoda, Spiriferida) from the Donets Basin (Ukraine) and South Urals (Russia) Author Poletaev, Vladyslav 4BF22B2D-FD42-4588-AB80-BBA5DDF4A579 Institute of Geological Sciences of the National Academy of Sciences of Ukraine, 55 - b, Oles Honchar St., Kyiv, 01054, Ukraine. vipoletaev38@gmail.com text European Journal of Taxonomy 2024 2024-11-04 968 132 155 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2723/12515 journal article 305035 10.5852/ejt.2024.968.2723 21b497f6-a2ee-4af8-b2e0-027aadacb4eb 2118-9773 14047314 35322F0D-0A5C-4227-AB4D-D4758ECA6E7A Genus Tiramnia Grunt, 1977 Type species Martinia uralica Chernyshev, 1902 ; original designation. Diagnosis Shells small to medium-sized, brachythyrid outlines, without plates or septa in either valve; fold and sulcus weakly or moderately developed; furrow in sulcus is very weak or absent. Surface smooth or with the weak, short ribs on anterior edge. Muscle field of ventral valve comparatively large, lanceolate; radial vascular imprints ramiform; axial mantle canal (vascula media) singular. Included Pennsylvanian species Arctic Russia , the northern Ural ( Chernyshev 1902 ; Grunt 1977 ): Tiramnia uralica ( Chernyshev, 1902 ) , T. semiglobosa ( Chernyshev, 1902 ) Permian, Cisuralian ; T. tschaikensis Grunt, 1977 ; upper Pennsylvanian, Cape Chaika. Arctic Canada and Southeastern Alaska ( Carter & Poletaev 1998 ): Tiramnia waltery Poletaev, 1998 and T. grunti Poletaev, 1998 ; Pennsylvanian. Greenland ( Grunt 1977 ): Tiramnia greenlandica Grunt, 1977 ; Permian. China ( Chao 1929 ): Tiramnia changchiacouensis Chao, 1929 ; Pennsylvanian. Ukraine (this paper) Tiramnia davidi sp. nov. , Lower Pennsylvanian. Remarks Tiramnia Grunt, 1977 differs from Martinia M’Coy, 1844 by the presence of a ramified vascular system; Tiramnia differs from Jilinmartinia Li & Gu, 1980 by having single (connected) vascula media rather than paired vascula developed in the ventral interior of the latter. Tiramnia differs from the somewhat similar Postamartinia Wang & Yang, 1993 by having round, elongated, but not transverse shells, by the absence of low ribs on the flanks, and by a much shorter tongue of sulcus.