Catalog - Globigerina stainforthi

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina stainforthi Brönnimann 1952

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 -> Globigerina -> Globigerina stainforthi
Other pages this level: << < G. scabrosa, G. scalena, G. schachdagica, G. scobinata, G. seminolensis, G. seminulina, G. semivera, G. siakensis, G. simulans, G. siphonifera, G. soldadoensis, G. soldadoensis angulosa, G. spinuloinflata, G. spiralis, G. spirata, G. stainforthi, G. stainforthi Hofker, G. steiningeri, G. stonei, G. subcorpulenta, G. subcretacea, G. subcretacea Chapman, G. subdigitata, G. subsphaerica, G. subtarchanensis, G. subtriloculinoides, G. supracretacea, G. taminensis, G. tarchanensis, G. tardita, G. taroubaensis> >>

Globigerina stainforthi

Citation: Globigerina stainforthi Brönnimann 1952
Rank: Species
Type specimens: USNM 370084 Plate 3,figs. 10-12,T.L.L.,Cat.No.143838
Type sample (& lithostrat): Lizard Springs formation, Sh.100, 30 feet augerhole,T.L.L.,Cat.No.143838,Kapur Stone area,Guayaguayare,south Trinidad. Plate 3,figs.13-18
Type repository: USNM Washington DC

Linked specimens: USNM-370084

Current identification/main database link: Subbotina triloculinoides (Plummer 1927)


Original Description

The medium-sized trochoid test of about two volutions is lobulate in its general outline. The last volution is invariably composed of four chambers. The spiral side is elevated and the central spire clearly shows the trochoid arrangement of
the minute early chambers. The small umbilicus is shallow. The subglobular chambers increase gradually in size.
The end chamber, however, is equal to or smaller than the penultimate one. The arcuate aperture with its large liplike border is opening into the umbilicus. The well-defined sutures are oblique in the early and straight in the final stage. The walls are finely perforate. The surface is pitted,more coarsely on the early than on the final chambers. The species is coiled to the right and to the left.

Size:
Holotype: Coiling: sinistral. Dimensions: maximum diameter, 0.287mm,; end chamber radial diameter, 0.125mm.; tangential diameter, 0.175mm.

Etymology:
The species is named after R.M.Stainforth for his contributions to the micropaleontology of Trinidad.

Extra details from original publication
Remarks. The elevated spiral side and the arrangement of the sutures brings this species in relationship to G.pseudo-bulloides from which it differs by the four adult subglobular chambers and the large arcuate aperture with broad liplike border. The maximum diameter ranges from 0.15mm. to 0.3mm.,the average is about 0.175mm. Eight out of 14 specimens are coiled to the right.

Occurrence: Both zones of the Lizard Springs formation, rare. Sh.100, 30 feet augerhole,T.L.L.,Cat.No.143838,Kapur
Stone area, Guayaguayare,south Trinidad.

Editors' Notes

References:

Brönnimann, P. (1952d). Trinidad Paleocene and lower Eocene Globigerinidae. Bulletins of American Paleontology. 34(143): 1-34. gs

Hofker, J. (1956e). Tertiary foraminifera of coastal Ecuador; Part II - Additional notes on the Eocene species. Journal of Paleontology. 30(4): 891-958. gs


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Globigerina stainforthi compiled by the pforams@mikrotax project team viewed: 30-9-2022

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