Foraminifera taxon details
From editor or global species database
Diagnosis Test of medium to large size, up to 7 or more mm in length, elongate fusiform, with pointed extremities, up to eight volutions, earliest ones tightly coiled about the tiny proloculus and thin walled, then gradually increasing in height, septa plane in the earliest whorls, irregularly fluted in later whorls throughout the length of the test, increasing from about nine septa per whorl in the early stage up to thirty-two in the latest whorl; wall of tectum and coarsely alveolar keriotheca, tunnel moderately wide, straight, chomata present in early whorls but poorly developed or lacking in outer ones, heavy axial fillings, particularly toward the poles, sutures deeply indented and chamber surface also has longitudinal and transverse indentations, resulting in a rough pebbly surface that together with the irregular septal fluting produces the rugose appearance of sections. L. Permian (Sakmarian), Wolfcampian; Southwest USA. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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