CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia pusilla pusilla Bolli 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 -> Globorotalia -> Globorotalia pusilla pusilla
Other pages this level: << < 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, 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> >>

Globorotalia pusilla pusilla

Citation: Globorotalia pusilla pusilla Bolli 1957
Rank: sub-species
Type locality: Globorotalia pusilla pusilla Zone and lower part Globorotalia pseudomenardii zone, Guayaguayare well 159, Trinidad Leasholds, Ltd., Lizard Springs Formation., Trinidad.
Type specimens: Holotype (USNM P5064) from Trinidad Leaseholds, Ltd., well Guayaguayare 159, Trinidad (coordinates N:151361 links; E:554095 links), sample from core 4,778-90 feet (TLL 233706).
Type repository: Washington; USNM

Linked specimens: USNM-5064

Current identification/main database link: Igorina pusilla (Bolli 1957)


Original Description
Shape of test low trochospiral, biconvex, compressed: equatorial periphery nearly circular, slightly lobate; axial periphery acute to subacute. Wall calcareous, perforate, surface smooth. Chambers compressed; 12-16, arranged in 2 1/2-3 whorls, the 5-6 chambers of the last whorl increasing moderately in size. Sutures on spiral side strongly curved, slightly depressed; on umbilical side radial, depressed. Umbilicus narrow, open. Aperture a low arch, with narrow lip; interiomarginal, extraumbilical-umbilical. Coiling random.

Size: Largest diameter of holotype 0.24 mm.

Extra details from original publication
Remarks: Globorotalia pusilla pusilla Bolli, new species, new subspecies, is distinguished from G. capdevilensis Cushman and Bermudez by its closer coiling, stronger curved sutures on the spiral side and slightly less compressed chambers. The new subspecies differs from G. albeari Cushman and Bermudez in having fewer chambers in the last whorl (about 5 instead of 8-10) and in being less trochospiral.

References:

Bolli, H. M. (1957d). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. 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: 61-82. gs V O

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. 1-252. gs


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Globorotalia pusilla pusilla compiled by the pforams@mikrotax project team viewed: 15-4-2021

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