WoRMS taxon details
From editor or global species database
Diagnosis Test discoidal, sides flattened, but slightly elevated in the central region, quinqueloculine in early stage, later planispiral with low and elongate chambers increasing very slowly in height as added, more than two chambers per whorl, from two and a half to four in the final whorl; wall calcareous, imperforate, hyaline, surface of later chambers appearing crenulate, with five or six radial to slightly oblique transverse constrictions per chamber; aperture at the end of the final chamber, consisting of numerous prominent pores in an apertural plate, also with a row of grooves perpendicular to and just distal to each suture of the final whorl, probably with sutural pores as in Polysegmentina. Holocene; E. Pacific: Galapagos Islands; Gulf of California; off Mexico; off Costa Rica. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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