Spiriferid genus Warrenella from the Upper Devonian of Southern and Middle Timan

Abstract

Nordella orbiculata (Ljaschenko, 1959) and N. subquadrata Ljaschenko, 1973 are revised based on the topotypical material from the collection of A.I. Ljaschenko. Based on data on the morphology, microornamentation, and shell structure Nordella is shown to have characters closely similar to Warrenella Crickmay, 1953 and, therefore, should be considered as its junior synonym. A new species, W. timanimedia sp. nov., is described from the Upper Devonian of Middle Timan.