CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia quadraria Cushman & Ellisor 1939

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 quadraria
Other pages this level: << < 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, G. scitula ventriosa> >>

Globorotalia quadraria

Citation: Globorotalia quadraria Cushman & Ellisor 1939
Rank: species
Type locality: Ellender, Terrebonne Parish, Louisiana
Type age (chronostrat): Miocene
Type sample (& lithostrat): core sample from Humble Oil and Refining Company's No.1, at a depth of 10,411-21 feet.
Type specimens: Holotype (Cushman ColI. No. 25231)
Type repository: Washington; USNM

Linked specimens: USNM-25232 USNM-25231

Current identification/main database link: Globoquadrina dehiscens (Chapman, Parr & Collins, 1934)

Original Description
Test very unequally biconvex, dorsal side slightly convex, ventral side very strongly so, periphery in the last-formed portion almost truncate, broadly rounded in the earlier portion, umbilicate the ventral side; chambers distinct, strongly inflated, four in the adult whorl, the inner side of the final chamber flattened or even slightly concave, the face much higher than broad; sutures distinct, only slightly depressed, slightly limbate; wall very coarsely perforate except the apertural face which is finely perforate and much smoother than the remainder of the test which is cancellated; aperture, an elongate opening at the ventral margin of the last-formed chamber, extending to the umbilicus, with a slight lip.

Size: Diameter 0.40-0.50 mm.; height 0.35 mm

Extra details from original publication
This species resembles Globorotalia centralis Cushman and Bermudez from the Eocene of Cuba, but differs from that species in the very coarsely perforate and cancellated surface, the very much flattened or even concave apertural face, and the more definitely quadrate final chamber. In some of its characters, it also resembles G. dehiscens Chapman, Parr and Collins from the Tertiary of Australia.


Cushman, J. A. & Ellisor, A. C. (1939). New species of foraminifera from the Oligocene and Miocene. Contributions from the Cushman Laboratory for Foraminiferal Research. 15: 1-14. gs V O

Wade, B. S., Pearson, P. N., Olsson, R. K., Fraass, A. J., Leckie, R. M. & Hemleben, C. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Dentoglobigerina and Globoquadrina. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 11): 331-384. gs V O


Globorotalia quadraria compiled by the pforams@mikrotax project team viewed: 19-4-2021

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