Foraminifera taxon details
From editor or global species database
Diagnosis Test free, subglobular to nautiloid, planispiral and involute, or with slight asymmetry, biumbilicate, periphery broadly rounded, chambers appearing subquadrate in section, septa straight or slightly inclined toward the aperture; wall calcareous, thick, finely granular, perforate, or with radiate structure in section, commonly recrystallized; aperture a low basal equatorial arch. L. Carboniferous (Visean); Eurasia; North America. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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