DISCORBINELLA Cushman and Martin. 1935

 

 

Type species: Discorbinella montereyensis Cushman and Martin, 1935; OD.

Discorbinella Cushman and Martin. 1935(*833), p. 89. Discopulvinulina Hofker. 1951(*1500), p. 359: type species: Rosalina bertheloti d'Orbigny. 1839 (*2305),p. 135: OD.Discorbinellopsis McCulloch. 1977(*1961), p. 298: type speciese Discorbinellopsis symmetrica McCulloch. 1977: OD.Discorbinoides McCulloch. 1977(*1961). p. ^{299 (}non Discorbinoides Saidova. 1975): type species: Docorbinoides chincaensis McCulloch. 1977: OD.Neoplanodiscorbis, McCulloch_.1977(*1961 ). p. 309: type species: Neoplanodiscorbis galapagosensis McCulloch. 1977: OD.Discorbinoidella McCulloch, 1981 (*1962), p. 6 (nom.subst. pro Discorbinoides McCulloch. 1977).Test ovate to circular in outline. planocon­vex. trochospiral, with a slight tendency to uncoil. so that part of earlier whorls may be visible centrally on both sides, spiral side convex, with broad low chambers enlarging rapidly as added and sutures curved and depressed, umbilical side flattened, chambers Innate, each with a projecting semicircular umbilical flap or folium, posterior end of the folium of earlier chambers leaving an inden­tation in the sutures, periphery carinate: wall calcareous, finely perforate, surface smooth: primary aperture an interiomarginal arch at the periphery, with a smaller secondary open­ing at the posterior end of the folium. Miocene to Holocene; cosmopolitan.