Copeland 1964 pl 41 f5.JPG
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Copeland 1964 pl 41 f5.JPGCurrent identification:
Original Description
Test thick, higher than wide, consisting of three whorls in a low trochospiral arrangement; chambers inflated, globular, rapidly enlarging, about 14 in number, five in the last whorl, closely app ressed; sutures radial, slightly depressed on the dorsal side, strongly depressed ventrally; wall medium perforate, cancellate, forming irregularly shaped depressions; aperture umbilical-extraumbilical, a large, elongate, semicircular opening bordered by a faint lip.
Size: Height, 0.36 mm.; width , 0.30 mm.; thickness, 0.27 mm.
Extra details from original publication
The amount of variation in this species is slight. The forms range from 0.27 mm.-0.39 mm. in height with from four-five chambers in the outer whorl. In a few specimens the lip becomes more pronounced.
Globigerina hexagona Natland (1938, Bull. Scripps Inst. Oceanography, vol. 4, No. 5, p. 149, pl. 7, f ig. l a-c) differs in the more strongly cancellate test and the low arched aperture.
Editors' Notes
The name is consistently given as macrastoma (not macrostoma), so this clearly was the inntended spelling. [editor's comment - JRY 2018]
Copeland, C. W. (1964). Eocene and Miocene foraminifera from two localities in Duplin County, North Carolina. Bulletins of American Paleontology. 47: 209-324. gsReferences:
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Globigerina macrastoma compiled by the pforams@mikrotax project team viewed: 27-1-2021
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