SIPHOMARGINULINA McCulloch, 1981

 

Type species: Sip ho marginulina hybrida McCulloch, 1981: OD.Siphontaryinulina McCulloch. 1981 (*1962), p. 82.Test elongate. compressed. periphery rounded and noncarinate, early chambers planispirally enrolled, only three to four cham­bers in the coil, final few chambers uncoiled and rectilinear, sutures radial in the early coil, oblique in the uncoiling part; wall calcare­ous. hyaline, translucent, finely perforate, sur­face smooth; aperture rounded at the dorsal angle, produced on a neck and bordered by a distinct lip with crenulate margin. Holocene; Caribbean Sea.