From editor or global species database
Diagnosis Test trochospirally enrolled about an open umbilicus, chambers broad, low, appearing crescentic on the spiral side; aperture an interiomarginal umbilical-extraumbilical arch with additional secondary openings on the umbilical side, may have a perforated plate over the umbilicus. M. Eocene to Holocene. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]