Catalog - Sphaeroidinella transiens Catalog - Sphaeroidinella transiens

CATALOG OF ORIGINAL DESCRIPTIONS: Sphaeroidinella transiens Carter 1963

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 -> S -> Sphaeroidinella -> Sphaeroidinella transiens
Other pages this level: S. cellata, S. dehiscens excavata, S. dehiscens reticulata, S. dehiscens subdehiscens, S. disjuncta, S. ionica, S. ionica evoluta, S. ionica ionica, S. missionis, S. multiloba, S. rutschi, S. senni, S. spinulosa, S. transiens

Sphaeroidinella transiens

Citation: Sphaeroidinella transiens Carter 1963
Taxonomic rank: species
Type specimens: no. 57735.
Type sample (& lithostrat): Portland Limestone: in a pale grey marl.
Type age (chronostrat): Upper Miocene
Type locality: From Level 1, a bed of pale grey marl at the base of a cliff section on the west side of Darlot Creek, Condah Mission, reference 756045 Heywood sheet, allotment 6a, Parish of Condah, Australia.
Type repository: Melbourne; Geological Museum of Victorian Geological Survey, Melbourne, Australia

Current identification:


Original Description

Definition. - A Sphaeroidinella of the apparently primitive type, with all chambers (about 12) visible from the dorsal side, but only three or four chambers visible from the ventral side. Chambers arranged in a very low trochospiral coil, without any marked envelopment of early chambers by later ones. Sutures deeply depressed. Pores small and closely spaced. Umbilicus deep but narrow. Aperture small, at base of last chamber, opening into umbilicus.
Description. - A small free test. composed of about twelve globular chambers arranged in about two and half whorls; trochospiral with a very low spire and appearing almost planispiral in peripheral view. Chambers increase in size slowly at first, later rapidly. Sutures are unthickened, deeply depressed. There is no development of sutural flanges. Wall of test is thin, translucent, smooth but not polished ; pores are small and closely spaced. Aperture is small and almost invisible, opening into a deep, narrow umbilicus.

Size:
Dimensions: Great diameter 0.41 mm.: lesser diameter 0.33 mm.; height 0.25 mm.

References:

Carter, A. N. (1963). Appendix no. 3, foraminifera from the Portland Limestone. In, Boutakoff, N. (ed.) The geology and geomorphology of the Portland area. Memoirs of the Geological Survey of Victoria . 22: 156-160. gs


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Sphaeroidinella transiens compiled by the pforams@mikrotax project team viewed: 8-2-2026

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