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Current identification/main database link: Praeglobotruncana inermis Hasegawa 1999
Original Description
Description.- Test of medium to large size, medium to high trochospiral, equatorial periphery lobulate ; chambers petaloidal in shape on dorsal side, trapezoidal to subglobular, inflated on dorsal side, about 12 in all arranged into 2 to 2.5 whorls, enlarging gradually in size as added, characteristically 4 chambers in final whorl, with a weak peripheral band formed of an aligned concentration of pustules which tends to be shifted toward spiral side ; final chamber shifted toward umbilical direction ; sutures on dorsal side radial and depressed except for that of first chamber in last whorl which occasionally is raised, ventrally radial and depressed; umbilicus shallow, medium to narrow in size, less than 1/4 of maximum diameter of test; primary aperture bordered by a distinct lip that expands markedly near umbilicus, interiomarginal, umbilical- extraumbilical ; wall calcareous, surface smooth, earlier chambers weakly pustulated
Size:
Etymology:
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:
Praeglobotruncana inermis compiled by the pforams@mikrotax project team viewed: 7-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=131997 Go to Archive.is to create a permanent copy of this page - citation notes |
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