The protozoan superfamily Fusulinacea Möller (1878) includes a great number of marine species, most of which evolved rapidly and flourished extensively during the Pennsylvanian and Permian Periods of geologic time. This superfamily of the Foraminifera became extinct near the end of Permian time, but its geologic and geographic occurrences are known in considerable detail because paleontologists and stratigraphers have studied the diverse evolution and nearly world-wide distribution of many genera and species in order to establish age relations between fusulinid-bearing strata. The two genera Pseudosckwagerina and Paraschwagerina considered in this paper are conspicuous forms having coiled calcareous tests about 15 mm long (fig. 1). These genera first appeared near the beginning of Permian (Wolfcampian) time and became extinct before late Permian time