Australicythere Benson 1964

• Main Authors: Brandão, Simone N., Saeedi, Hanieh, Brandt, Angelika
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Ostracoda; Podocopida; Hemicytheridae; Australicythere; Antarctic; Southern Ocean; The Antarctic; Antarctic Peninsula; Ross Sea; McMurdo Sound; Ross Island; Pacific; Indian; Elephant Island; Briggs; Dingle; Sulzberger Bay; Antarc*; Antarctica; Antarktis*; Scientific Committee on Antarctic Research
• Online Access: https://dx.doi.org/10.5281/zenodo.5797597; https://zenodo.org/record/5797597

GENUS AUSTRALICYTHERE BENSON, 1964 (FIG. 4B) Australicythere sp. (Fig. 2A) Remarks: Australicythere sp. is similar to Australicythere polylyca (Müller, 1908), but the original description of the last species contained only simple sketches (Müller, 1908: pls 12.1, 12.5, 12.6), because no SEM was available at that time. The type material has not been re-investigated or re-illustrated since then and, consequently, the morphology of the species remains unknown. Subsequent authors recorded specimens identified as A. polylyca from 93 locations of the continental shelf of Antarctica (17–464 m) in the Atlantic, Pacific and Indian sectors of the SO (Brandão, 2012; Brandão & Dingle, 2014; Riehl et al. , 2020). However, all these records, and consequently the putatively wide geographical distribution range of A. polylyca , need to be taken with care, because SEM photos and illustrations of the specimens studied from different authors are distinct from the original illustrations and sometimes also distinct from each other. For example, the recent specimen from the Gauss station (type locality, Indian Sector of the SO) has a subrectangular outline, with subparallel dorsal and ventral margins and wide marginal rim (Müller, 1908: pl. 17.1). The specimen from the Taylor Formation (Pleistocene, Ross Island, Pacific Sector of the SO) has a wide marginal rim, but sinuous dorsal margin and dorsolateral ribs (Briggs, 1979: fig. 2.2). The specimen from McMurdo Sound (Recent, Sulzberger Bay, Pacific Sector of the SO) has a subrectangular outline, but with a narrow marginal rim (Benson, 1964: pl. 4.2). The specimens from the Antarctic Peninsula have a subtriangular outline, with sinuous dorsal margin (Hartmann, 1986: pl. 3.4). Therefore, we herein prefer to leave the specimens of Australicythere in open nomenclature, rather than adding even more confusion to a taxon that is already in need of a taxonomic review. The genus Australicythere is recorded for the first time in the continental slope of Antarctica and adjacent abyssal plain (3631 m), because all previous records were from the continental shelf (17–464 m). : Published as part of Brandão, Simone N., Saeedi, Hanieh & Brandt, Angelika, 2022, Macroecology of Southern Ocean benthic Ostracoda (Crustacea) from the continental margin and abyss, pp. 226-255 in Zoological Journal of the Linnean Society 194 on page 239, DOI: 10.1093/zoolinnean/zlab078, http://zenodo.org/record/5799815 : {"references": ["Benson RH. 1964. Recent Cytheracean Ostracodes from McMurdo Sound and the Ross Sea, Antarctica. University of Kansas Paleontological Contributions 6: 1 - 36.", "Muller GW. 1908. Die Ostracoden der Deutschen Sudpolar- Expedition 1901 - 1903. Deutsche Sudpolar-Expedition 10: 51 - 181.", "Brandao SN. 2012. Southern Ocean Ostracoda (except Halocypridina) database. Available at: https: // doi. org / 10.15468 / de 1 pt 3 (accessed via GBIF. org 1 July 2021).", "Brandao SN, Dingle RV. 2014. Benthic Ostracoda. In: De Broyer C, Koubbi P, Griffiths HJ, Raymond B, d'Udekem d'Acoz C, Van de Putte AP, Danis B, David B, Grant S, Gutt J, Held C, Hosie G, Huettmann F, Post A, Ropert-Coudert Y, eds. Biogeographic atlas of the Southern Ocean. Cambridge: Scientific Committee on Antarctic Research, 142 - 148.", "Riehl T, Brandao SN, Brandt A. 2020. Conquering the ocean depths over three geological eras. In: Poore GCB, Thiel M, eds. Evolution and biogeography, Vol. 8. Oxford: Oxford University Press, 155 - 182.", "Briggs WM Jr. 1979. Ostracoda from the Pleistocene Taylor Formation, Ross Island, and the Recent of the Ross Sea and MacMurdo Sound region, Antarctica. Antarctic Journal of the United States 13: 27 - 29.", "Hartmann G. 1986. Antarktische benthische Ostracoden 1. (Mit einer Tabelle der bislang aus der Antarktis bekannten Ostracoden). Auswertung der Fahrten der ' Polarstern' Ant III / 2 (Sibex-Schnitte) und der Reise 68 / 1 der ' Walther Herwig' (1. Teil: Elephant Island) in die Antar. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 83: 147 - 221."]}