Foraminifera taxon details
From editor or global species database
Diagnosis Test spherical to irregularly rounded; wall calcareol,ls, thick, of two layers, a thin dark compact, dense inner layer and a thick gray friable outer layer; wall pierced by canals that lead to the exterior and may open in small moundlike elevations but do not appear to communicate with the inner cavity. U. Silurian (Ludlovian) to L. Carboniferous. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
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