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.
Current identification/main database link:
Test free, calcareous, circular in contour, slightly compressed, trochospiral, biconvex, periphery lobulated, broadly rounded; wall some what smooth, coarsely perforate, slightly hispid, opaque, com paratively thick; dorsal side presenting a low spire of two and a half to three whorls of medium sized subglobose in flated chambers, 5 or 6 somewhat variable in size and shape chambers in last formed whorl; chambers embracing; all sutures depressed curved to radiate dorsally, radiate ventrally; ventral side involute presenting an umbilicus more or less open; aperture interiomarginal extraumbilical umbilical with a narrow rim or lip outlining its periphery usually visible.
Size: Size. - Holotype (fig. 7) 0.54 x 0.515 x 0.415mm; hypotype (fig. 4) 0.498 x 0.476 x 0.415mm; paratype (fig. 5) 0.511 x 0.498 x 0.341mm; hypotype (fig. 6) 0.541 x 0.476 x 0.498mm; hypotype (fig. 15) 0.642 x 0.561 x 0.415mm.
Extra details from original publication
Banner and Blow (1960, p. 11, pl. 2, figs. 1, 4) redefined the taxa Globigerina eggeri Rhumbler, 1901, and Globigerina dutertrei D’Orbigny, 1839, on the basis of their research, the original descriptions and type figures, the present series of forms seems to be different from both the above taxa. G. eggeri is a species with more depressed sutures, a higher, off-center apex, sharply defined spiral suture chambers which are smaller, more inflated, and more uniform in size and shape. The overall shape and position of final chamber and umbilicus of test are distinctive. The present forms are less globose tending to be flatter as shown in the edge views. The taxon of G. dutertrei d’Orbigny is less sharply defined. d’Orbigny’s original illustrations point to an outer whorl of chambers deeply lobulate chambers increasing in size to a large last formed one dorsally. Banner and Blow’s lectotype does not present the same characters as above. It presents a more globose form, less lobulate with an infilled ‘umbilicus with out a rim or lip.’ The series of five forms herein illustrated show variation in number of, shape of and organization of chambers dorsally along with considerable variation of structure, size of last formed chamber and umbilicus. Globigerina conglomerata Schwager, 1866, G. dutertrei d’Orbigny, and G. eggeri Rhumbler have been reported in Eastern Pacific waters.”
Banner, F. T. & Blow, W. H. (1960). Some primary types of species belonging to the superfamily Globigerinaceae. Contributions from the Cushman Foundation for Foraminiferal Research. 11: 1-41. gs :: :: 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 :: ::
Banner, F. T. & Blow, W. H. (1960). Some primary types of species belonging to the superfamily Globigerinaceae. Contributions from the Cushman Foundation for Foraminiferal Research. 11: 1-41. gs :: ::
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 hybrida compiled by the pforams@mikrotax project team viewed: 8-8-2020
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