CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina occlusa Herman 1974

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 occlusa
Other pages this level: << < G. mexicana, G. microfoliata, G. micropora, G. microstoma, G. microstoma opsionepenthoides, G. minutula, G. moskvini, G. multiloba, G. nepenthes, G. nepenthes delicatula, G. nepenthoides, G. nilotica, G. nipponica, G. nitida, G. nodosa, G. occlusa, G. officinalis, G. officinalis crux, G. oligocaenica, G. orbiformis, G. ouachitaensis, G. ouachitaensis gnaucki, G. ouachitaensis senilis, G. ovoidea, G. oxfordiana, G. panormensis, G. parabulloides, G. paradubia, G. paraobesa, G. paratriloculinoides, G. paravenezuelana> >>

Globigerina occlusa

Citation: Globigerina occlusa Herman 1974
Rank: species
Type locality: Arctic core sample D.st.A. 6, from
Type age (chronostrat): Recent
Type sample (& lithostrat): D.st.A. 6, 58.5 to 59.5 cm
Type specimens: Plate 3, Figs. 13 through 16; Plate 10, Figs. 3 and 4; U.S.N.M. No. 186540 (holotype) & 186539 (paratypes)
Type repository: USNM

Linked specimens: USNM-186537 USNM-186538

Current identification/main database link: Neogloboquadrina pachyderma (Ehrenberg, 1861)

See also: Globigerina cryophila - replacement name;


Original Description
Test trochospiral with subrounded compact periphery; early whorls obscured by the last whorl which is composed of 4 to 4½ subspherical chambers gradually increasing in size; occasionally a diminutive last chamber is present. The aperture is small umbilical-extraumbilical, generally obscured by a wide apertural flap or lip. The wall is thick, perforate; the sutures are radial and narrow.  
The coiling direction of G. occlusa is predominantly sinistral in unit I sediments; the percentage of right-coiling specimens is highest in the foraminifera-poor sediments of unit II (Fig. 12).

Size: The average length of this species is 0.32 mm and its width is 0.26 mm.

Extra details from original publication
The new species differs from G. pachyderma by the elongate last chamber, position of aperture, and its wider lip.

Distribution: G. occlusa is common in late Cenozoic Arctic Ocean sediments (in units I, II, and III; Fig. 14), particularly in the foraminifera-rich zones of unit I.

Editors' Notes
This is a junior homonym of Globigerina praebulloides subsp. occlusa Blow & Banner, 1962. Herman 1980 introdcued the substitute name Globigerina cryophila.

References:

Herman, Y. (1974). Arctic Ocean sediments, microfauna, and the climatic record in late Cenozoic time. In, Herman, Y. (ed.) Marine geology and oceanography of the Arctic seas. Springer-Verlag, Berlin 283-348. gs


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Globigerina occlusa compiled by the pforams@mikrotax project team viewed: 23-7-2021

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