CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinita bikiniensis McCulloch 1977

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globigerinita -> Globigerinita bikiniensis
Other pages this level: G. africana, G. bikiniensis, G. boweni, G. dissimilis ciperoensis, G. globiformis, G. glutinata flparkerae, G. hardingae, G. howei, G. incrusta, G. iota, G. martini, G. martini martini, G. martini scandretti, G. naparimaensis, G. parkerae, G. riveroae, G. stainforthi praestainforthi, G. unicava primitiva

Globigerinita bikiniensis

Citation: Globigerinita bikiniensis McCulloch 1977
Rank: species
Type locality: In 860-1150 fms. on Velero Station 6000, 11°54N, 165°02E, off Bikini Atoll, South Pacific.
Type age (chronostrat): Recent
Type specimens: holotype (fig. 13), AHF 2577; paratype (fig. 14), AHF 2578.
Type repository: Los Angeles, Univ Southern California, Allan Hancock Foundation

Current identification/main database link:


Original Description
Test free, calcareous, subcircular, equatorially trochospiral, biconvex, periphery lobulate opaque to slightly semihyaline; dorsal side evolute, almost flat presenting two whorls of subglobose in flated chambers some what appressed increasing slowly, gradually in size; sutures dorsally radial depressed spiral suture weakly lobulate; seven chambers in last formed whorl; ventral side involute umbilicus closed one whorl of six or seven chambers visible; sutures radial depressed; texture of chambers more hyaline, smoother; last formed chamber much in flated extended to cover umbilical area with min ute an gular mar ginal extensions observed at each sutural groove, no sup ple mentary, min ute apertures observed, primary aperture interiomarginal? and covered? 

Size: “Size. - Holotype (fig. 13) 0.187 x 0.144 x 0.09mm; paratype (fig. 14) 0.166 x 0.124 x 0.062mm.

Extra details from original publication
This species suggests Globigerinita parkerae Loeblich and Tappan, 1957, Gulf of Mexico. It differs from the above species in being smaller, less lobulate, more com pressed, and possible less coarsely perforate. The supplementary chambers at the margin of the umbilical extension of last formed chamber are not as sharply defined as expected. The test is not only minute but the umbilical extension in all three species described in this study seem to be rather tightly appressed at their margins.

References:

McCulloch, I. A. (1977). Qualitative observations on Recent foraminiferal tests with emphasis on the eastern Pacific (3 vols). University of Southern California, Los Angeles. -. gs


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Globigerinita bikiniensis compiled by the pforams@mikrotax project team viewed: 26-11-2020

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