CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinoides transitoria Blow 1956

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 transitoria
Other pages this level: << < G. sacculiferoides, G. sacculiferus immatura, G. sacculiferus irregularis, G. semiinvoluta, G. semiinvolutus, G. sicanus, G. sicanus praesicanus, G. subconglobatus micra, G. subconglobatus subconglobata, G. subquadrata, G. subquadratus praesubquadratus, G. subquadratus subelongatus, G. suleki, G. tapiesi, G. tenella, G. transitoria, G. triloba altiapertura, G. triloba aspera, G. trilobus bullatus, G. tyrrhenicus

Globigerinoides transitoria

Citation: Globigerinoides transitoria Blow 1956
Rank: species
Type locality: auger line near Pozon, eastern Falcon, Venezuela.
Type age (chronostrat): Siphogenerina transversa zone
Type sample (& lithostrat): sample no. R.M. 19280, T. L. L. Cat. No. 130296, Pozon formation,
Type specimens: USNM 64591
Type repository: Washington, USNM ; paratypes in NHM London and NHM Basel

Linked specimens: USNM-64591 USNM-64592

Current identification/main database link: Praeorbulina curva (Blow, 1956)

Original Description
Test bilobate. Penultimate and ultimate chambers nearly equal in size. Early chambers not inflated, arranged in a low trochoid spire and partly embraced (40-60 per cent) by the penultimate chamber. Early chambers lie within the general bilobate contour of the test. Sutures moderately incised. Apertures multiple, narrow short slits, confined to the sutures of the last and earlier chambers. Wall composed of more than one layer; wall surface cancellate but variable, the last chamber often less coarsely cancellate than the earlier chambers.

Extra details from original publication
Remarks: The species shows rather variable morphology, and shows forms that are transitional to Globigerinoides bispherica and Biorbulina bilobata.

Occurrence: This form becomes fairly abundant in the uppermost part of the Globigerinatella insueta zone in the Cipero and Brasso formations of Trinidad, but does not persist into the overlying Globorotalia fohsi barisanensis subzone. In Venezuela, it occurs in the middle part of the Siphogenerina transversa zone. The species has also been observed in the Bissex Hill formation of Barbados.


Blow, W. H. (1956). Origin and evolution of the foraminiferal genus Orbulina d'Orbigny. Micropaleontology. 2(1): 57-70. gs


Globigerinoides transitoria compiled by the pforams@mikrotax project team viewed: 7-3-2021

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