Originally published by Ischenko from the Tournaisian of Western Donbass, Ukraine; Byvscheva (in Trudy Vsesoyuzn. Nauchno-Issl. Geol.-Razved. Neft. Inst. 106: 102. 1971) originally designated incorrectly 'lectotype, which should be treated as 'neotype; however, both type designations were done for 'species' names associated with subgroup, not generic names, and hence both invalid.