CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia fohsi robusta Bolli 1950

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 fohsi robusta
Other pages this level: << < G. cushmani, G. dalii, G. decorata, G. dehiscens, G. delrioensis, G. denseconnexa, G. dolabrata, G. dominicana, G. edgari, G. ehrenbergi, G. emilei, G. extans, G. faragi, G. flabelliformis, G. fohsi, G. fohsi robusta, G. formosa formosa, G. formosa gracilis, G. gavalae, G. gemma, G. globigeriniformis, G. greenhornensis, G. hadii, G. haunsbergensis, G. haynesi, G. hemisphaerica, G. hessi, G. hexacamerata, G. hirsuta aemiliana, G. hirsuta eastropacia, G. hispidicidaris, > >>

Globorotalia fohsi robusta

Citation: Globorotalia fohsi robusta Bolli 1950
Rank: sub-species
Holotype Repository: Washington; USNM
Type & figured specimens: Cushman Collection (No. 64136)

Linked specimens: USNM-64136 USNM-64137

Current identification/main database link: Fohsella robusta Bolli, 1950


Original Description
The test is often longer than broad, the dorsal side nearly flat to slightly convex, the ventral side strongly convex. About two whorls are visible from the dorsal side, the last with seven or eight gradually enlarging chambers. The adult chambers often have a slight lobation. The peripheral margin shows a distinct keel throughout. Sinistral tests dominate the species (over 90% of the specimens encountered). The ventral sutures are radial and slightly depressed, the dorsal ones oblique or slightly curved and often limbate. The umbilicus is small; the wall finely perforate, the ventral side of the early chambers often of a granular aspect. The aperture, an elongate slit on the ventral side of the margin of the last chamber (interiomarginal) extends from the umbilicus nearly to the periphery and has a small lip.

Size: Average dimensions.-Length: 0.45 to 0.7 mm; breadth: 0.3 to 0.6 mm; thickness: 0.25 to 0.3 mm.

Extra details from original publication
Occurrence.-This subspecies occurs in the upper part of the OLligocene Cipero formation of Trinidad.

References:

Bolli, H. M. (1950a). The direction of coiling in the evolution of some Globorotaliidae. Contributions from the Cushman Foundation for Foraminiferal Research. 1(3&4): 82-89. gs

Bolli, H. M. (1957b). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. In, Loeblich, A. R. , Jr. , Tappan, H. , Beckmann, J. P. , Bolli, H. M. , Montanaro Gallitelli & E. Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 97-123. gs


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Globorotalia fohsi robusta compiled by the pforams@mikrotax project team viewed: 22-1-2020

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