Foraminifera taxon details
From editor or global species database
Diagnosis Test relatively large, up to 1.0 mm in diameter, nautiloid, slightly concave sides and rounded periphery, early stage streptospiral, later planispiral, whorls increasing gradually in height, from six to ten chambers in the final whorl, septa straight, long, thick; wall calcareous, thick, microgranular, with calcite inclusions and coarsely agglutinated material, may show slight differentiation of a thin dark outer layer, secondary deposits lacking or consisting of a layer on the floors and infilling the comers of the chambers; aperture basal. L. Carboniferous (L. Visean); USSR; Belgium; Japan. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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