NEOPLANORBULINELLA Matsumara, 1976

 

     

 

Type species: Neoplanorbulinella saipanensis Matsumara. 1976: OD,

Neoplanorbulinella  Matsumara. 1976 (_*2061), p. 201.Test conical to coneavoconvex, up to 0.75 mm in diameter, megalospheric protoconch consisting of proloculus and slightly to completely embracing second chamber, followed by numerous trochospirally arranged chambers. adult with equatorial chambers in annular series and with two or more rows of lateral chambers on the concave side: wall calcareous. thick, coarsely perforate: multiple aperture consists of a basal opening on each side of the chambers. L. Miocene: W. Pacific: Saipan. Mariana Islands.