pforams@mikrotax - Antarcticella pauciloculata

Citation: Antarcticella pauciloculata (Jenkins 1966)

Basionym: Globigerina pauciloculata Jenkins 1966

Synonyms:

Globigerina pauciloculata Jenkins, 1966, p. 1106, figs. 3(7– 15), 3(16– 41), 4(42) [lower Danian, New Zealand].
Globastica daubjergensis (Brönnimann). Huber, 1988, figs. 32(10–11) [lower Danian, Seymour Island, Antarctica].
Eoglobigerina edita (Subbotina). Stott & Kennett, 1990, pl. 1, figs. 9–10 [lower Danian, ODP Hole 690C, Maud Rise].
Antarcticella pauciloculata (Jenkins). Liu et al., 1998, p. 15 [refigured illustrations]. Hollis & Strong, 2003, p. 249 [Middle Waipara River Gorge, South Island, New Zealand, lower Danian Zones Pα – P1b]. Malumían & Náñez, 2011, fig. 5.2 [lower Danian, Jagüel Fm., sample OP 10, Neuquén Basin, Argentina]; Ballent et al., 2011, figs. 14.6–14.7 [lower Danian, Jagüel Fm., sample SGN 2904-05, Neuquén Basin, Argentina].

[synonymy from Huber et al. 2020]

Description

Test small, 120-170 µm in maximum diameter, globular, biconvex, lobate in equatorial outline, low trochospiral with 1.5 to 2 whorls of 7 to 9 chambers in adult specimens; chambers increase rapidly in size up to the penultimate chamber, 3.5 to 4.5 in the final whorl; proloculus large, ranging from 30 to 40 µm in diameter, final chamber ampullate, kummerform, extending over the umbilicus, umbilicus sometimes covered by bullae; sutures slightly to moderately depressed and radial on spiral and umbilical sides, umbilicus closed; wall finely perforate with a mostly smooth surface except for umbilical sutures and umbilical region, which may be covered with blunt pustules; aperture a low, interiomarginal umbilical-extraumbilical arch on early chambers, with a transition to accessory apertures between bridge like projections along the umbilical sutures. [Liu et al. 1998]

Biogeography and Palaeobiology

Comparison of stable isotope measurements from Maud Rise specimens of An. pauciloculata, planktonic specimens of Globanomalina planocompressa and Eoglobigerina eobulloides, and the benthic species Gavelinella beccariiformis (Table 4, Fig. 9) establishes that it lived a planktonic not benthic mode of life since its δ18O and δ13C values group with co-occurring planktonic species for multiple samples. Liu et al. (1998) postulated that An. pauciloculata evolved from a benthic ancestor, perhaps Praepararotalia cretacea, and adapted to a tychopelagic or wholly planktonic life mode. [Huber et al. 2020]

Thought to have evoved from a benthic ancestor (Liu et al 1988).

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Thanetian Stage (55.96-59.24Ma, top in Thanetian stage). Data source: Liu et al 1998, tentative
First occurrence (base): within Danian Stage (61.61-66.04Ma, base in Danian stage). Data source: Jenkins 1966, Huber 1988

References:

Ballent, S. et al. (2011). Microfósiles Mesozoicos y Cenozoicos. In, Anon (ed.) Relatorio del XVIII Congreso Geológico Argentino, Neuquén, Argentina. 489-528. gs

Hollis, C. J. & Strong, C. P. (2003). Biostratigraphic review of the Cretaceous/Tertiary boundary transition, mid-Waipara River section. New Zealand Journal of Geology and Geophysics. 46: 243-254. gs

Huber, B. T. (1988). Upper Campanian-Paleocene foraminifera from the James Ross Island region (Antarctic Peninsula). In, Feldmann, R. M. & Woodburne, M. O. (eds) Geology and Paleontology of Seymour Island, Antarctica. Geological Society of America, Memoir . 169: 163-252. gs

Huber, B. T., Petrizzo, M. R. & MacLeod, K. G. (2020). Planktonic Foraminiferal Endemism at Southern High Latitudes Following the Terminal Cretaceous Extinction. Journal of Foraminiferal Research. 50(4): 382-402. gs

Jenkins, D. G. (1966b). Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand. New Zealand Journal of Geology and Geophysics. 8 [1965](6): 1088-1126. gs

Liu, C., Olsson, R. K. & Huber, B. T. (1998). A benthic paleohabitat for Praepararotalia gen. nov. and Antarcticella Loeblich and Tappan. Journal of Foraminiferal Research. 28(1): 3-18. gs

Malumían, N. & Náñez, C. (2011). The Late Cretaceous-Cenozoic transgressions in Patagonia and the Fuegian Andes: Foraminifera, palaeoecology, and palaeogeography. Biological Journal of the Linnean Society. 103: 269-288. gs

Stott, L. D. & Kennett, J. P. (1990). The Paleoceanographic and Paleoclimatic signature of the Cretaceous/Paleogene boundary in the Antarctic: Stable isotopic results from ODP Leg 113. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 829-848. gs

Antarcticella pauciloculata

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

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