CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia wilesi Thompson 1980

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 wilesi
Other pages this level: << < G. tosaensis, G. traubi, G. tribulosa, G. trichotrocha, G. trinidadensis, G. troelseni, G. truncatulinoides excelsa, G. uncinata, G. uncinata carinata, G. ungulata, G. velascoensis parva, G. wartsteinensis, G. whitei, G. wilcoxensis, G. wilcoxensis acuta, G. wilesi, G. woodi, G. youngi, G. zealandica, G. zealandica incognita, G. zealandica pseudomiozea,

Globorotalia wilesi

Citation: Globorotalia wilesi Thompson 1980
Rank: Species
Type locality: Northwest Pacific Ocean, DSDP Site 435, (sub-bottom depth 104 m).
Type age: Late Pliocene
Type sample and level: DSDP 435-12-1, 65-67cm.
Holotype Repository: Washington; USNM
Type & figured specimens: Plate 4, Figures 1-3; 239939; Holotype: USNM 239939 (Plate 4, Figures la, b). Paratypes: USNM 239940 (Plate 4, Figures 3a, b).

Linked specimens: USNM-239940 USNM-239939 USNM-207229

Current identification/main database link: Globorotalia scitula (Brady, 1882)


Original Description
Test free, small, biconvex, about 14 subglobular chambers arranged in a low trochospire of about three whorls, 4½ to 5 chambers in the final whorl. Chambers increasing gradually in size with growth, partially embracing, slightly inflated on the spiral side, moderately inflated on the umbilical side. Equatorial periphery lobulate; axial profile moderately biconvex, the final chamber more ventrally inflated than the earlier chambers. No true carina present, although the acutely rounded peripheral edges of the chambers are imperforate. Intercameral sutures on both spiral and umbilical sides simple and curved; spiral suture slightly lobulate. Aperture interiomarginal, umbilical-extraumbilical, a symmetrical arch of moderate height at the base of the strong umbilical shoulder, bordered by an imperforate apertural rim. Wall calcareous, perforated with large pores, the pores concentrated mostly on the spiral side away from the test margin; pore diameter variable, with a tendency to be larger on the early whorls; pore shape subcircular. Surface shiny, translucent, sparsely and irregularly pustulate, the isolated pustules mostly on the umbilical side of the early chambers in the final whorl. Coiling is almost invariably dextral.

Size: Maximum observed diameter 0.2 mm

Etymology: The species is named in honor of the late Dr. William E. Wiles of the Department of Geology, Rutgers University.

Extra details from original publication
Remarks: Parker (1964) recognized this species as new, but was reluctant to describe it from the few specimens recovered from the Experimental Mohole Site off Mexico. She did note the small size of the test, its slighty curving sutures, and translucent test wall with relatively large pores. Rogl and Bolli (1973) compared their Caribbean form to G. crassaformis and G. scitula, but did not propose it as a separate taxon because of the close similarities to these two species. It is, as they suggested, most similar to G. scitula, which has, however, much larger and more closely spaced pores, usually with a funnel-shaped pore depression, and the test has a very weakly lobulate equatorial outline. Because G. wilesi has been found often in North Pacific sediment samples without G. scitula and G. hirsuta (Thompson, 1977), it is inferred that G. wilesi probably is not an immature stage of either species. It is common in the region of the temperate North Pacific beneath the Kuroshio current, and migrated to tropical latitudes during glacial ages of the Pleistocene. This species was first described in an unpublished work by Thompson (1977). It is therefore redescribed here, with redesignation of the primary types. 

Occurrence: This species has been observed mostly in the North Pacific between latitudes 24 and 45°N, less commonly in the South Pacific between latitudes 17 and 40°S, and rarely in the Indian Ocean and Caribbean. The geologic range observed by Parker (1964) at the Guadalupe site is approximately Pliocene to recent. At DSDP Site 435, it occurs sporadically down to Section 435A-5-3 (Plate 4, Figures 3a, b). At this level, the periphery is conspicuously more acute and the umbilical shoulder more inflated than in younger sediments, suggesting an early Pliocene base of the range.

References:

Thompson, P. R. (1980). Foraminifers from Deep Sea Drilling Project Sites 434. 435 and 436, Japan Trench. Initial Reports of the Deep Sea Drilling Project. 56-57(2): +785+-. gs V O


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Globorotalia wilesi compiled by the pforams@mikrotax project team viewed: 19-9-2020

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