Planopulvinulina Schubert 1921

Test probably attached, large and planoconvex, spiral side arched, with few rapidly enlarging chambers, at first trochospirally enrolled, later with more irregular arrangement and chambers of varied size and form, spreading over the attachment surface, sutures depressed, oblique on the spiral side, more nearly radial on the umbilical side; wall calcareous, hyaline, surface strongly tuberculate on the spiral side, the tubercles enlarged on earlier chambers and finer and more widely spaced on the later spreading chambers, wall finely perforate between the tubercles, more extensive perforate area in later chambers; aperture consisting of widely spaced large pores scattered over the umbilical surface and additional openings along the sutures on the umbilical side. Late Tertiary to Holocene; Atlantic. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)