CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinoides pseudoruber Todd 1957

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 -> Globigerinoides -> Globigerinoides pseudoruber
Other pages this level: << < G. kennetti, G. korotkovi, G. kuehni, G. macrostoma, G. minuta, G. mitra, G. muratai, G. nuttalli, G. obliqua, G. obliquus amplus, G. obliquus extremus, G. parawoodi, G. parkerae, G. parva, G. pseudodubia, G. pseudoruber, G. pseudosellii, G. quadrilobatus hystricosus, G. quadrilobatus praeimmaturus, G. quadrilobatus primordius, G. ruber albus, G. ruber parkeri, G. rubra seigliei, G. rubriformis, G. sacculifer brachysacculifer, G. sacculifer minimus, G. sacculifer spinulosus, G. sacculifera subsacculifera, G. sacculiferoides, G. sacculiferus immatura, G. sacculiferus irregularis> >>

Globigerinoides pseudoruber

Citation: Globigerinoides pseudoruber Todd 1957
Rank: species
Type locality: Holotype from locality C85, southern Saipan, Mariana Islands.
Type age (chronostrat): Upper Oligocene
Type sample (& lithostrat): Fina-sisu formation.
Type specimens: 623954
Type repository: Washington; USNM

Linked specimens: USNM-689871 USNM-689869 USNM-689870 USNM-689871 USNM-689869 USNM-689870

Current identification:


Original Description
"Test large for the genus, loosely coiled, very high-spired, triserial. Chambers large, inflated. Sutures distinctly incised. Wall calcareous, perforate, orname nted with closely spaced, blunt spines. Apertures several, the main one a large high-arched opening into the last chamber at the junction between that chamber and the last suture separating the two preceding chambers; supplementary apertures much smaller arched openings, situated in the incised areas of suture junctions. 

Size: Maximum dimension of test 0.60-0.80 mm. 

Extra details from original publication
Except for the final chamber, this species resembles a giant Globigerinoides ruber (d'Orbigny) [Globigerina rubra d'Orbigny, 1839] in its chamber arrangement, but the supplementary apertures are much smaller. None of the chambers show any peripheral flattening nor does the final chamber appear to balance the rest of the test, as it does in G. rubra. This species differs from the Miocene form Globigerinoides mitra Todd from the Donni sandstone (Saipan) in having a more inflated and loosely coiled test and fewer chambers per whorl (three instead of as many as six). That G. pseudoruber may be an advanced stage of Globigerinoides subquadratus Brönnimann is a possibility, though rather a remote one because of the prominent spire in G. pseudoruber.

References:

Todd, R. (1957). Smaller foraminifera, in Geology of Saipan, Mariana Islands, Pt. 3, Paleontology. U.S. Geological Survey, Professional Paper. 280-H: 265-320. gs V O


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Globigerinoides pseudoruber compiled by the pforams@mikrotax project team viewed: 21-4-2021

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