Foraminifera taxon details
From editor or global species database
Diagnosis Test small, up to about 1.5 mm in length, earliest one or two whorls tightly planispiral, with short axis of coiling, followed by sharp change in axis of coiling, test then becoming elongate and fusiform, final whorl rapidly increasing in length and height, finally uncoiling and rectilinear, septa very thin and strongly fluted, the folds reaching the roof of the chamber in the final whorl; wall very thin, of thin tectum and slightly thicker and less dense homogeneous layer, chomata present but tunnel not clearly defined. U. Permian; USA: Texas; Canada: British Columbia; Japan; Cambodia; Pakistan; Yugoslavia; Greece; Turkey; USSR: Crimea. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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