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.

Higher levels: pf_cat -> G -> Globorotalia -> Globorotalia rex
Other pages this level: << < G. pseudospinulosa, G. pshadae, G. pumilio, G. puncticulata padana, G. puncticulata puncticuloides, G. pusilla laevigata, G. pusilla mediterranica, G. pusilla pusilla, G. quadraria, G. quadrata, G. quetra, G. quinifalcata, G. redbankensis, G. reissi, G. renzi, G. rex, G. saginata, G. saheliana, G. salisburgensis, G. saphoae, G. scitula gigantea, G. scitula praescitula, G. scitula subscitula, G. scitula ventriosa, G. seigliei, G. sibaiyaensis, G. sinuososuturalis, G. spinulosa, G. strabocella, G. sturanii, G. subbotinae> >>

Globorotalia rex

Citation: Globorotalia rex Martin 1943
Rank: Species
Type locality: Lodo Gulch, Panache Quadrangle, Fresno County, California.
Type age (chronostrat): Early Eocene
Type sample (& lithostrat): Sample I-S2+48, Lodo formation,
Type specimens: Plate VIII, figures 2a, 2b, 2c; Holotype.-Stanford Univ. Paleo. Type Coli. No. 7404. Paratypes in USNM
Type repository: Stanford; Paleontological Type Collection, Stanford University, Calif.
Described on page(s) : 117-8

Linked specimens: USNM-559452

Current identification/main database link: Morozovella subbotinae (Morozova 1939)

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.


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. gs V O

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 team viewed: 19-4-2021

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