From editor or global species database
Diagnosis Test free, biserial throughout, although plane of biseriality may be slightly twisted with continued growth; wall calcareous, optically hyaline oblique, perforate granular in structure; aperture an areal loop-shaped slit that runs obliquely up the apertural face. Holocene; Pacific Ocean; Indian Ocean. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]