Brachiopod faunas from the basinal facies of southeastern Thuringia (Germany) before and after the Hangenberg Crisis (Devonian–Carboniferous boundary)

[摘要] Upper Famennian-Tournaisian (Hastarian) brachiopods from the deep-water, mixed siliciclastic-carbonate Gleitsch Formation (Breternitz and Pfaffenberg members) of southeastern Thuringia (mainly from the Saalfeld area, Germany) are described systematically. A new Tournaisian rhynchonellide genus (Thuringorhynchus gen. nov.) and four new Tournaisian species are described (Productina saalfeldensis sp. nov., Thuringorhynchus pseudoequitans gen. et sp. nov., Cleiothyridina pfaffenbergensis sp. nov., and Crassumbo germanicus sp. nov.). Moreover, the lectotype of “Lingularia” straeleni (Demanet, 1934), from the Tournaisian of Belgium, is selected. Prior the Hangenberg Crisis, the brachiopod assemblage (10 species) of the Breternitz Member (upper and uppermost Famennian) is strongly dominated by species belonging to smooth to poorly ornamented rhynchonellide genera (Hadyrhyncha, Novaplatirostrum, Rozmanaria, and rozmanariid? gen. indet.) notably reported from Laurussia and the northern margin of Gondwana. The onset of the Hangenberg Crisis is marked by an anoxic black shale horizon at the top of the Breternitz Member followed by the siltstones and turbiditic sandstones of the Obernitz Member; both horizons did not yield brachiopods.

[学科分类] 地质学

[关键词] Bernard Mottequin;Konrad Bartzsch;Eric Simon;Dieter Weyer;Brachiopoda;Famennian;Tournaisian;Hangenberg Crisis;Thuringia;Germany