Foraminifera taxon details
From editor or global species database
Diagnosis Test elongate cylindrical, microspheric test up to 22 mm in length, large irregular proloculus may be flattened, followed by nine to eleven low, closely coiled volutions, septa numerous, twelve to fifteen in the early whorls, up to fifty in the final whorl, regularly and strongly fluted, with narrow septal folds, the fluting of adjacent septa opposed and producing cuniculi where in contact; wall thin, both tectum and keriotheca thin, central tunnel well defined low, and slitlike, with regularly arranged supplementary tunnels that are continuous into the outer whorls, no chomata or parachomata present, heavy axial fillings confined to the axial region in the early whorls. M. Permian (U. Kungurian), U. Guadalupian; USA: Texas, New Mexico; Mexico. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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