WoRMS taxon details
From editor or global species database
Diagnosis Test discoidal, proloculus followed by enrolled undivided tubular second chamber, early coiling streptospiral, later planispiral, second chamber not a complete tube, as the lateral walls overlap the preceding whorl that becomes the chamber floor; wall calcareous, imperforate, milky white, porcelaneous, thin, and delicate, surface with transverse growth wrinkles; aperture a broad arch at the open end of the tube. Holocene; S. Atlantic; Arctic; Antarctic. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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