New and revised taxa of Carboniferous spiriferides (Brachiopoda, Spiriferida) from the Donets Basin (Ukraine) and South Urals (Russia)

The brachiopods Meristorygma donakovae Poletaev, 2018, Johnsoniana nom. nov. from Mississippian strata of the Urals and Betaneospirifer stepanovi Poletaev, 2015 from Gzhelian rocks of the Urals are re-described. Tiramnia davidi sp. nov. from the Bashkirian of the Donets Basin (Ukraine) is newly described. Revision of available data shows that the revised genus Verneuilia Hall & Clarke, 1893 belongs to the family Elythynidae Gourvennec, 1994 of the superfamily Martinioidea Waagen, 1883. The genera Johnsoniana nom. nov., Changshunella Sun et al., 2004 and possibly Minythyra Branton, 1984 belong to the family Oceaniidae Poletaev, 2015 of the superfamily Paeckelmanelloidea Ivanova, 1972. The importance of characters such as denticulation of the hinge line of the interarea and type of vascular impression in the diagnosis of higher spiriferid taxa is shown.