Citation: Globuligerina waskowskae Gradstein, in Gradstein & Waskowska 2021Rank: SpeciesType sample (& lithostrat): sample GN 6 in the lower part of the Gnaszyn section; grey and slightly sandy claystone with numerous bioclasts, mainly of mollusks shellsType age (chronostrat): Morrisi Ammonite Zone Middle BathonianType locality: Częstochowa area of Poland (Gradstein et al. 2017a, Figures 12 and 13)Type repository: Krakow; European Micropalaeontology Reference Centre of the MicroPress Europe Foundation at AGH, Krakow, Poland.
Original Description Test generally in the 100–150 μm range, with three whorls in a trochoid coil. The relatively small initial whorls stand in contrast to the large, final whorl with four chambers, regularly increasing in size. Our specimen photographs show the relatively flat spiral base of the last whorl. The axis of coiling tilts in the large penultimate chamber, resulting in progressive forward tilting over the umbilicus and culminating in crescentic shape of the other three chambers in the final whorl. Sutures depressed, aperture umbilical, a low and elongate arch to high arched, with a rim. Umbilicus closed. Wall microperforate, with many small pustules and scattered pore mounds. Size: 100–150 μm range Etymology: The new species is named in honour of Dr. Anna Waskowska, who did the fieldwork, the sampling and the micropalaeontologic analysis leading to the discovery of this new and distinctive species. Extra details from original publication Discussion We only have observed this taxon in samples from the Gnaszyn outcrop section. It is not clear if this single locality occurrence is because its stratigraphic range might be short, or that it is endemic to this shallow marine basin of Poland.
Its distinctive test morphology points towards it as a potential forerunner of Conoglobigerina helvetojurassica (Haeusler) of the Middle Oxfordian of Switzerland and the Kimmeridgian of Portugal and France. The latter differs by its reticulate wall texture. Currently, we lack information on the occurrence of the new taxon in upper Bathonian through lower Oxfordian strata. As an example of morphological similarity, we show a picture on Fig. 2 nos. 9a, b of C. helvetojurassica from sample 24.2P from the lower Kimmeridgian Tojeira Formation, Montejunto Portugal. It is common in this sample, also rich in deeper marine epistominids such as E. mosquensis Uhlig. If it was without a reticulate wall texture, the Kimmeridgian specimens of C. helvetojurassica could readily be assigned to G. waskowskae nov. sp. Editors' Notes
Gradstein, F. & Waskowska, A. (2021). New insights into the taxonomy and evolution of Jurassic planktonic foraminifera. Swiss Journal of Palaeontology. 140(1): 1-12. gsVO
Gradstein, F. M., Gale, A. S., Kopaevich, L., Waskowska, A., Grigelis, A. & Glinskikh, L. (2017b). The planktonic foraminifera of the Jurassic. Part I: material and taxonomy. Swiss Journal of Palaeontology. 136(2): 187-257. gsVO
Globuligerina waskowskae compiled by the pforams@mikrotax project teamviewed: 6-12-2022