Foraminifera taxon details
From editor or global species database
Diagnosis Test conical with elliptical base, trochospiral early coil lies to one side of the apex, later stage with numerous rectilinear chambers, with interior having a narrow marginal zone subdivided by many radial exoskeletal beams, primary beams alternating with two orders of shorter ones, and each chamber subdivided medially by a single transverse exoskeletal rafter, interior of central zone with numerous endoskeletal pillars that within each chamber are narrower toward the base of the test and widen toward the test apex, pillars in concentric rows, those of each row alternating in position with those of adjacent rows; aperture of pores located near the base of each pillar in the central zone. L. Cretaceous (Valanginian to Bedoulian;) France; Portugal; Qatar Peninsula. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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