Asano 1962 pl 23 f7.JPG
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Asano 1962 pl 23 f7.JPGCurrent identification/main database link: Trilobatus quadrilobatus (d’Orbigny, 1846)
Original Description
Test low, trochospiral with four chambers in last whorl, periphery rounded, quad- rilobate equatorially; chambers inflated, arranged in 2-3 whorls; sutures depressed, gently curved; wall rather finely perforated; umbilicus large; primary aperture a medium-sized arch, interiomarginal, umbilical, with a clear lip, one or two supplementary sutural apertures are visible in last few chambers.
Size: Maximum diameter of holotype 0.5 mm.
Etymology: named for Dr. Shigeo Murata of the Kyushu Institute of Technology, Tobata, Japan
Extra details from original publication
Remarks:- This species is distinguished from its allied ones by the low trochospiral and typically quadrilobate outline of the test.
Occurrence:- Occasionally found from the Norimatsu shale of the Chikuho Coal-fields.
Asano, K. (1962). Tertiary Globigerinids from Kyushu, Japan. Science Reports of the Tohoku University, Series 2 (Geology). Special Volume 5: 49-65. gsReferences:
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Globigerinoides muratai compiled by the pforams@mikrotax project team viewed: 4-3-2021
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