CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia pseudomiocenica Bolli & Bermudez 1965

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 pseudomiocenica
Other pages this level: << < G. planocompressa evoluta, G. planocompressa planocompressa, G. planoconica, G. planoconvexa, G. platispira, G. pliozea, G. praemargaritae, G. praemenardii, G. praemiocenica, G. praenartanensis, G. praepseudomenardii, G. pseudochapmani, G. pseudocrassa, G. pseudomayeri, G. pseudomenardii, G. pseudomiocenica, G. pseudopachyderma, G. pseudoscitula, G. pseudoscitula elongata, 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, > >>

Globorotalia pseudomiocenica

Citation: Globorotalia pseudomiocenica Bolli & Bermudez 1965
Rank: species
Type locality: Holotype from cut in road leading from Higuerote to Chirimena, after bridge across lagoon immediately northwest of Carenero, Estado Miranda, Venezuela.
Type age: Globorotalia menardii Zone; Middle Miocene
Type sample and level: Carenero Formation
Holotype Repository: USNM
Type & figured specimens: Plate 1, Figures 13 - 15. holotype. X 130.
Description on pages: 140-141

Linked specimens: USNM-642970

Current identification/main database link: Globorotalia pseudomiocenica Bolli & Bermudez 1965


Original Description
Shape of test very low trochospiral. flat to only very slightly convex on spiral side. strongly convex on umbilical side: equatorial periphery slightly lobate; axial periphery acute with a thin but distinct keel. Wall calcareous, finely perforate. surface smooth to very finely pitted. Chambers angular. more or less flat on spiral side, high on umbilical side; about 12, arranged in 2 to 2½ whorls: the 4 to 5 chambers of the last whorl increase moderately in size. Sutures on spiral side curved; on umbilical side radial to slightly curved and slightly depressed. Umbilicus very narrow. Aperture a slit bordered above by a fine rim or lip. interiomarginal, umbilical-extraumbilical.

Size: Largest diameter of holotype: 0.52. mm.

Extra details from original publication
Remarks. - Globorotalia pseudomiocenica Bolli and Bermudez differs from Globorotalia menardii (d'Orbigny) in the flatter, almost plane spiral side. in the strongly convex umbilical side, the thinner peripheral keel and often also by the smaller size of the test. The new species differs from Globororalia miocenica Palmer in having a more lobate equatorial periphery which in typical Globorotalia miocenica is practically not lobate. The spiral side may in some specimens of Globorotalia pseudomiocenica be very slightly convex. in typical Globorotalia margaritae Zone (Bowden and Buff Bay type localities) and from the Globoquadrina altispira altispira/Globorotalia truncatulinoides Zone and the Globorotalia truncatulinoides/Globorotalia inflata Zone (Submarex well 6301 of the Marine Laboratory, University of Miami). It appears that Globorotalia pseudomiocenica has also a much wider geographic distribution than Globorotalia miocenica.

References:

Bolli, H. M. & Bermudez, P. J. (1965). Zonation based on planktonic foraminifera of middle Miocene to Pliocene warm-water sediments. Bol. Informativo, Asoc. Venez. Geol., Min. Petrol.. 8(5): 121-149. gs


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Globorotalia pseudomiocenica compiled by the pforams@mikrotax project team viewed: 6-4-2020

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