... (Strophopleuridae, Strophopleurinae), which is characterized by small, strongly biconvex and transverse (mucronate) shells with a smooth, narrow fold and sulcus and bearing numerous simple lateral ribs, as only Tournaisian–Viséan in age, it was reported in the uppermost Famennian...

... of plications and in its oval muscle field divided by a low median septum. However, S. pseudodraschei has a much higher interarea. Superfamily Paeckelmanelloidea Ivanova, 1972 Family Strophopleuridae Carter, 1974 Subfamily Pterospiriferinae Waterhouse, 1975 Genus Alispirifer...

... Spiriferidina Waagen, 1883 Superfamily Paeckelmanelloidea Ivanova, 1972 Family Strophopleuridae Carter, 1974 Subfamily Pterospiriferinae Waterhouse, 1975 Genus Alispirifer Campbell, 1961 Alispirifer Campbell , 1961 , p. 434. A. laminosus Campbell, 1961 , p. 434...

..., fig. 25e) seems to be evident since the umbo, whereas in the Iranian material is initially flat and inconspicuous. Occurrence: Mobarak Formation, Damghan, Alborz, North Iran, Abrendan section. Superfamily PAECKELMANELLOIDEA Ivanova, 1972 Family STROPHOPLEURIDAE Carter, 1974...