Citation: Globanomalina wilcoxensis globulosa Gohrbandt 1967Rank: sub-speciesType specimens: Holotype (plate 1, figures 16-17), acquisition no. 683/9 I 1966.Type sample (& lithostrat): Sample 64/1, 36/9 (Go.).Type age (chronostrat): EoceneType locality: Mattsee, AustriaType repository: Vienna; Department of Geology, Naturhistorisches Museum, Vienna, Austria
Original Description Test free, planispirally coiled, biumbilicate, slightly evolute; periphery moderately lobulate. Wall calcareous, finely perforate, surface smooth. Chambers spherical, the last whorl consisting of 6 chambers, increasing rapidly in size. Sutures radial, slightly curved, depressed. Aperture a low equatorial arch, with a small apertural lip. Size: Dimensions of holotype: Largest diameter 0.39 mm. Etymology: Extra details from original publication Remarks: Globanomalina wilcoxensis globulosa is well represented in a number of samples from the Helvetikum north of Salzburg. The specimens are closely related to Globanomalina wilcoxensis (Cushman and Ponton), and are regarded as belonging to a subspecies of that form. In common with typical Globanomalina wilcoxensis are the spherical chambers and their rapid increase in size. There seems to be no difference in general size of the new subspecies. Cushman and Ponton ( 1932) reported a diameter of 0.25 mm. for the holotype, but Berggren (1960, p. 91) found the synonymous Globanomalina eocenica (Berggren) to have a size similar to that of Globanomalina wilcoxensis globulosa. However, both of these forms have straight sutures, whereas the new subspecies has slightly but consistently curved sutures. They are never as curved as those of the smaller and somewhat compressed Globanomalina micra (Cole). Globanomalina pseudovoluta (Bandy) has a reticulate wall structure.
Stratigraphic range: Globanomalina wilcoxensis globulosa was not observed in material older than basal Middle Eocene. The associated planktonic foraminiferal fauna at the type locality is listed below, under Globigerina hagni. It suggests correlation with the Hantkenina aragonensis Zone as established by Bolli (I 95 7 b) from Trinidad where this zone is interpreted as the basal part of the Middle Eocene. The present subspecies was not observed in that part of our material which corresponds to the upper part of Bolli's (1957b) Globigerapsis kugleri Zone Editors' Notes
Gohrbandt, K. H. A. (1967). Some new planktonic foraminiferal species from the Austrian Eocene. Micropaleontology. 13(3): 319-326. gs
Globanomalina wilcoxensis globulosa compiled by the pforams@mikrotax project teamviewed: 3-12-2022