Foraminifera taxon details
From editor or global species database
Diagnosis Test conical, base flat to slightly concave centrally, megalospheric embryonal apparatus at test apex consists of flattened protoconch and large deuteroconch, surrounded by a hemispherical zone of five to ten periembryonal chambers, microspheric generation with slight streptospiral coil, later stage with rectilinear chambers subdivided into marginal, radial and reticular zones, the thin marginal zone characterized by a network produced by the exoskeletal primary vertical beams, secondary beams, and horizontal rafters; wide radial zone occupying about one-half the test diameter, containing many primary radial beams that thicken toward the center of the test and become somewhat sinuous as viewed from the test apex, meeting and anastomosing in the central reticulate zone; wall imperforate, of microgranular calcite. L. Cretaceous (Barremian); France. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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