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Current identification/main database link: Dicarinella takayanagii Hasegawa 1999
Original Description
Description.-Test of medium to large size, low trochospiral, equatorial periphery lobulate; chambers initailly globigerine-like, later ones becoming wedge-shaped and flat on dorsal side, triangular and inflated in shape on ventral side, about 10 chambers in all, enlarging rapidly in size as added, about 4.5 chambers in last whorl, with widely separated weak double peripheral keels, one of which is shifted toward spiral side; final chamber diagnostically elongated in spiral direction, occasionally lacking peripheral keels; sutures on dorsal side gently curved, raised with keels that are continuous to one of peripheral keels, sutures on ventral side radial and depressed; umbilicus shallow and narrow, its width about 1/4 of maximum diameter of test; primary aperture bordered by a distinct lip, interiomarginal, umbilical-extraumbilical; wall calcareous, earlier chambers weakly pustulated.
Size:
Extra details from original publication
Hasegawa, T. (1999). Planktonic foraminifera and biochronology of the Cenomanian-Turonian (Cretaceous) sequence in the Ohyubari area, Hokkaido, Japan. Paleontological Research, Tokyo. 3: 173-192. gsReferences:
Dicarinella takayanagii compiled by the pforams@mikrotax project team viewed: 7-12-2024
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