Catalog - Globorotalia rexCatalog - Globorotalia rex
CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia rex Martin 1943
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.
Original Description Test planoconvex; flat to very slightly convex dorsally, strongly convex ventrally; wall calcareous, completely covered with numerous fine pores giving a frosted appearance; periphery angled, lobulate, with thickened irrgular keel; complete whorl visible dorsally, early whorls slightly raised above level of last whorl; ventrally only last whorl of four is visible; chambers inflated, increasing rapidly in size as added; dorsal sutures strongly curved, depressed; ventral sutures nearly straight, deeply depressed, distinctly separating the chambers; umbilicus incorporated into apertural opening on the ventral side; aperture a large crescentic opening at base of apertural face of last chamber, extending from umbilicus about three-fourths of way toward periphery, bordered on outer edge by a thin lip. Size: Maximum diameter 0.48 mm.; minimum diameter 0.39 mm.; maximum thickness 0.3 mm. Extra details from original publication Remarks. This species resembles Globorotalia aragonensis Nuttall (1930) but has fewer chambers, a more strongly lobulate periphery, no limbate sutures, and a more fragile appearance. A variant of this species, tentatively included under Globorotalia rex, has six chambers visible ventrally, a heavier shell wall, and a more granular surface. Among the specimens from Renz's locality Rz 413, San Fernando formation, Trinidad, are forms which appear to be identical to this variant found in Lodo sample I-S2.
Range.-Samples I-X7 through I-S9.
References:
Berggren, W. A. & Pearson, P. N. (2006a). Taxonomy, biostratigraphy, and phylogeny of Eocene Morozovella. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 11): 343-376. gsO
Martin, L. T. (1943). Eocene foraminifera from the type Lodo Formation, Fresno County, California. Stanford University Publications, Geological Sciences. 3(3): 1-35. gs
Globorotalia rex compiled by the pforams@mikrotax project teamviewed: 16-8-2026
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Martin 1943 plVIII f2.JPG
Eocene_Atlas_pl11-1_fig9-11.jpg
Martin 1943 plVIII f2.JPG
Eocene_Atlas_pl11-1_fig9-11.jpg
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