Catalog - Globorotalia (Fohsella) wabagensis Catalog - Globorotalia (Fohsella) wabagensis

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia (Fohsella) wabagensis Belford 1984

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 (Fohsella) -> Globorotalia (Fohsella) wabagensis
Other pages this level: G. (Fohsella) peripheroacuta pristina, G. (Fohsella) wabagensis

Globorotalia (Fohsella) wabagensis

Citation: Globorotalia (Fohsella) wabagensis Belford 1984
Taxonomic rank: species
Type specimens: Holotype (CPC 22018) and paratypes A to D (CPC 22019 to 22022)
Type locality: sample F.888 in a section west-southwest of Laiagam, locality 103, Wabag 1:25,000 Sheet area, Papua New Guinea;
Type repository: Canberra, Australia; Commonwealth Palaeontological Collection

Current identification:


Original Description

Diagnosis: A biconvex species of Fohsella with 4 or 5 chambers in the last whorl, broadly rounded axial periphery, pustulose ventral surface near umbilicus and interiomarginal aperture; narrow, thick apertural lip.

Description: Test trochoid, dorsal surface evolute, ventrally involute, umbilicus very narrow or closed, oval to circular in outline, equatorial periphery lobate, axial periphery rounded. Profile in edge view ranging from slightly convex dorsally and strongly convex ven- trally, to equally biconvex, to more strongly convex dorsally. Chambers arranged in about 3 whorls, with usually 5 but sometimes 4 chambers in the last whorl increasing slowly in size as added, last chamber offset towards ventral side. Spiral suture and dorsal intercameral sutures narrow, slightly depressed, dorsal sutures curved and strongly reftexed, dorsal chambers narrow, elongate; ventral sutures narrow, depressed, radial, or slightly sinuous between last 2 or 3 chambers. Periphery of early chambers of last whorl with thickened margin of clear shell material, visible only on moistened specimens, no keel developed. Test wall finely perforate, thickened and pustulose on ventral side of early chambers of last whorl and near umbilicus' early chambers on dorsal side obscured by shell material. Aperture interiomarginal, a narrow elongate opening extending from umbilicus to periphery, with narrow heavy, well developed lip.

Size:
holotype max diameter 0.31 mm

Etymology:
From the town of Wabag, Central Highlands, Papua New Guinea.

Extra details from original publication
Remarks: The holotype and paratypes show the full range of variation observed for G. (T.) wabagensis. The holotype is a five-chambered equally biconvex form with a distinct apertural lip. Paratype A is also five chambered, with a small open umbilicus and more narrowly rounded last chamber. Paratypes B and D are four chambered forms; Paratype B has a relatively large last chamber and only slightly convex dorsal side. Paratype D has a strongly convex dorsal side. Some of the four chambered forms resemble G. (G.) miozea cibaoensis Bermudez, 1949, but have a more broadly rounded last chamber and lack the high spire of cibaoensis.
Dr D. G. Jenkins has compared specimens of G. (T.) wabagensis with G. (G.) miozea miozea Finlay, 1939, and has also kindly forwarded specimens of miozea miozea. G. (T.) wabagensis is more biconvex than miozea miozea, has a distinct apertural lip not normally found in miozea miozea, and also seems to have a thinner test wall.

References:

Belford, D. J. (1984). Tertiary foraminifera and age of sediments, Ok Tedi-Wabag, Papua New Guinea. Australia Bureau of Mineral Resources Geology and Geophysics, Bulletin. 216: 1-52. gs


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Globorotalia (Fohsella) wabagensis compiled by the pforams@mikrotax project team viewed: 11-4-2026

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