Foraminifera taxon details
From editor or global species database
Diagnosis Test planispirally enrolled, compressed, partially evolute, whorls enlarging rapidly, chambers numerous, chamber lumen restricted to the peripheral area of the whorl so that in section it appears evolute, although the outer wall may somewhat overlap previous whorls, later chambers with a tendency to uncoil; wall exoskeleton with well-developed subepidermal network, endoskeleton consists of thick and massive septa pierced by the large apertures in the median plane of the test, no pillars present; aperture a single areal row of large openings extending up the apertural face in the plane of coiling, those of successive chambers aligned in radial series as seen in axial section, with new series of apertures intercalated between these as the spire enlarges. U. Jurassic (Oxfordian) to U. Cretaceous (Cenomanian); Mediterranean region; N. Africa; Mexico; Central America; Venezuela; Caribbean. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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