DIAGNOSIS - Shell shape broad, slightly carinated, spire short, spiral sculpture fine, typically alternating fine and finer, finer spiral cords present on subsutural slope, axial ribs typically pronounced when crossing spiral cords, absent on base.
REMARKS - Species of Eosipho differ from Gaillea species in the shorter but broader protoconch, the semi-oval shape with convex whorls lacking an angulate shoulder on the last whorl, the wide, flat-crested spiral cords covered with fine, narrow secondary cords, and the smoother periostracum. Molecular evidence for the separation of the genus Eosipho as a distinct phylogenetic branch was published by Kantor et al. (2013: 2181-2183, figs 1-4). Species of Calagrassor differ from Gaillea species in the shorter but broader protoconch, the semi-oval shape with convex whorls lacking an angulate shoulder, the spiral cords of equal size separated by narrow interspaces, the absence of secondary spiral cords, and the smaller adult size. Molecular evidence for the separation of the genus Calagrassor as a distinct phylogenetic branch was published by Kantor et al. (2013: 2181-2183, figs 1-4).