Catalog - Globoquadrina tripartita laxispira

CATALOG OF ORIGINAL DESCRIPTIONS: Globoquadrina tripartita subsp. laxispira Fordham 1986

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 -> Globoquadrina -> Globoquadrina tripartita laxispira
Other pages this level: G. altispira conica, G. altispira globosa, G. asanoi, G. dehiscens praedehiscens, G. globularis, G. himiensis, G. kagaensis, G. langhiana, G. larmeui, G. obesa, G. pachyderma pacifica, G. palmerae, G. patriciae, G. pozonensis, G. primitiva, G. pseudofoliata, G. quadraria advena, G. sellii, G. subdehiscens, G. tripartita laxispira, G. tripartita tricamerata

Globoquadrina tripartita laxispira

Citation: Globoquadrina tripartita subsp. laxispira Fordham 1986
Rank: sub-species
Type specimens: UQF 71383.
Type age (chronostrat): Orbulina suturalis zone; middle Miocene.
Type locality: DSDP 208-21-3 73-75 cm.
Type repository: Brisbane, Australia; U Queensland Univ.

Current identification:


Original Description

Very large, robust; moderately elevated sinistral trochospire, moderately loosely coiled in later whorls, both parallel and perpendicular to axis. Equatorial outline weakly lobate, almost quadrate; lateral outline highly umbilicoconvex. Chambers ovate parallel to axis, extremely closed appressed, about 16 in total, 4! in final whorl, 4 in second- last whorl; increase moderately rapid until fourth-last chamber when slower. Dorsal view: chambers distinctly longer concentrically, slightly inflated; sutures weakly depressed; intercameral sutures directed anteriorly and recurved halfway to periphery to be strongly curved posteriorly at distal end, thus posterior part of next chamber overlaps at the periphery. Ventral view: chambers vaulted halfway to umbilicus, thus leaving a wide umbilicus and reduced intercameral contact; intercameral sutures radial where present; aperture umbilical, covered by foreign material. Lateral view: dorsoperipheral shoulder and ventral face smoothly rounded; umbilical shoulder acute; apertural face steep. Wall cancellate with large dense pores.

Size:
Length, 660 µm; width, 640 µm; height, 600 µm.

Etymology:
Latin, laxus, loose, slack, unstrung; spira (f.), coil, twist.

Extra details from original publication
Description based on: Common material.
Holotype fig.: Fordham 1986 Pl. 4, fig. 9.

Editors' Notes

References:

Fordham, B. G. (1986). Miocene-Pleistocene planktic foraminifers from D.S.D.P. Sites 208 and 77, and phylogeny and classification of Cenozoic species. Queensland, Australia. 1-224. gs


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Globoquadrina tripartita laxispira compiled by the pforams@mikrotax project team viewed: 26-11-2022

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