CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina santamariaensis McCulloch 1977
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Citation: Globigerina santamariaensis McCulloch 1977taxonomic rank: speciesType specimens: holotype (fig. 7), AHF 2532.Type age (chronostrat): RecentType locality: In 7 fms. on Velero Station 67, in Bahia Santa Maria, Baja California; also in 200 fms. on Station 227 off Isla Guadlupe; Mexico; also in shallow water off Clipperton Island, Pacific Ocean; also in 70 fms. on Station 444, James Bay, James (Santiago) Island, in 75 fms. on Station 473, off Hood (Española) Island, and in 37 fms. on Station 437, Wreck Bay, Chatham (San Cristóbal) Island; Galápagos.Type repository: Los Angeles, Univ Southern California, Allan Hancock Foundation
Original Description Test free, calcareous, subcircular in contour, trochoid, compressed, planoconvex, evolute, involute; periphery strongly lobulate, broadly rounded; wall rather thin prominently punctate, com paratively smooth semihyaline; about three whorls of four subglobose chambers rapidly increasing in size particularly last formed one; sutures depressed, radiate last formed chamber longer than broad; aperture large broad, shal low with contour of opening of preceding chamber clearly shown in ventral view; narrow lips showing tendency to roll under. Size: “Size. - Holotype (fig. 7) 0.385mm dia. x 0.264mm. Extra details from original publication This species seems to be related to Globigerina bulloides d’Orbigny, 1826, from which it differs in the organization and structure of chambers particularly last formed one. It differs from Globigerina apertura Cushman, 1918, in organization of, and shape of chambers and in the size and structure of umbilicus. It presentsa less com pact test with the length greater than the width also. The chambers are less globose than in either of species above. They are broader, flatter with a different overall symmetry.
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
Globigerina santamariaensis compiled by the pforams@mikrotax project teamviewed: 11-9-2024
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McCulloch 1977 pl172 7.JPG
McCulloch 1977 pl172 7.JPG
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