Catalog - Globorotalia miozea sphericomiozea

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia miozea sphericomiozea Walters 1965

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 miozea sphericomiozea
Other pages this level: << < G. menardii jamesbayensis, G. menardii miocenica, G. menardii miotumida, G. menardii multicamerata, G. menardii neoflexuosa, G. menardii panda, G. mineacea, G. minuta, G. minutissima, G. miocenica mediterranea, G. miotumida explicationis, G. miozea, G. miozea acumarginata, G. miozea conoidea, G. miozea rifensis, G. miozea sphericomiozea, G. miroensis, G. mohleri, G. monmouthensis, G. multiloculata, G. munda, G. nagappai, G. nana pseudocontinuosa, G. nartanensis, G. naussi, G. neominutissima, G. nicobarica, G. nicolae, G. nicoli, G. obesa, G. occlusa> >>

Globorotalia miozea sphericomiozea

Citation: Globorotalia miozea sphericomiozea Walters 1965
Rank: sub-species
Type specimens: Holotype: (Fig. 8, N-P) Register No. TF 1490.
Type sample (& lithostrat): sample GRW 100
Type age (chronostrat): high Tongaporutuan-Kapitean
Type locality: A left-bank tributary of the Waimata River, Sheet N98/2, grid ref. 420525, approximately 9 miles north of Gisborne, N.Z.
Type repository: Lower Hutt; N.Z Geological Survey foraminiferal collections

Current identification/main database link: Globoconella puncticulata (Deshayes 1832)


Original Description

Test relatively small, a low trochospire consisting of 2½-3 whorls of slowly enlarging chambers, with 4-4½ (usually 4) in the last whorl; equatorial profile subcircular, equatorial periphery faintly lobate, dorsal surface gently convex, ventral side inflated, subconical; axial periphery bluntly rounded and somewhat thickened on earlier chambers, more angular on later chambers; wall fairly thick, becoming secondarily thickened on the chambers of the last formed whorl, especially on the periphery and ventral side; punctation fairly fine on the later chambers, becoming coarser on the thickened, somewhat rugose, ventral side of the earliest chambers of the last whorl; dorsally, chambers about twice as long as broad, separated by tangential, moderately curved sutures, sometimes slightly depressed between later chambers but forming irregular grooves in the thickened wall of earlier chambers; umbilicus very narrow or closed, aperture a low slit along the base of the apertural face, extending from the umbilical area almost to the periphery; septal foramen a low slit at the base of the septal face, becoming slightly higher at its peripheral end; a small, finely punctate, final chamberlet is often present.

Size:
Holotype maximum diameter = 0.32 mm; height = 0.21 mm.

Etymology:

Extra details from original publication
Remarks: This stratigraphically restricted species is distinguished by its small, compact test and its inflated, subconical ventral side. By a reduction in the number of chambers in the last whorl, and an increase in length and degree of inflation of the chambers (Fig. 8. Q-s), this subspecies appears to evolve, at the top of the Tongaporutuan-Kapitean, into the form referred to in New Zealand as G. inflata (d'Orbigny).

Stratigraphic Range: From near the top of the Tongaporutuan-Kapitean up into the basal part of the Opoitian Stage.

Editors' Notes

References:

Walters, R. (1965). The Globorotalia zealandica and G. miozea lineages. New Zealand Journal of Geology and Geophysics. 8: 109-127. gs V O


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Globorotalia miozea sphericomiozea compiled by the pforams@mikrotax project team viewed: 4-12-2022

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