Redescription and reassignment of Ondina semicingulata to the Pyramidellidae, with review of the occurrence of genus Evalea in the Western Atlantic (Gastropoda)

Shells of Ondina semicingulata. A. Syntype (USNM 107913), in apertural view; B. same in lateral view; C. same in ventral view; D. same, detail of protoconch in apical view. E. From Rio Grande do Norte state (MNRJ 27821), in apertural view; F. same, lateral view; G. same, adapertural view; H. same, detail of protoconch in apical view; I. same, detail of sculpture. J. From Brazil, Amapá state (MNRJ 27809), shell #1 in apertural view; K. same, shell #2 in ventral view. L. From Brazil, Bahia state, MNRJ 28264, in apertural view. M. From Brazil, Amapá state (MNRJ 26217), in ventral view. N. From Brazil, Rio Grande do Norte state (MNRJ 27834), in apertural view. Scale bars: whole shells (vertical bar): 1 mm; details (horizontal bar): 200 µm.