Demospongiae of ANT XXIV / 2 (SYSTCO I) Expedition — Antarctic Eastern Weddell Sea Author Göcke, Christian Author Janussen, Dorte text Zootaxa 2013 3692 1 28 101 journal article 10.11646/zootaxa.3692.1.5 ddffc7b3-2654-49ec-b046-f32bc78af2d6 1175-5326 249019 136660B8-7DCC-490E-AB79-46546CC18E40 Tetilla leptoderma Sollas, 1886 ( Fig. 3 A) Tetilla leptoderma Sollas, 1886: 179 . Sollas 1888: 3, pl. 1, figs. 1–15. Burton 1929: 418. Koltun 1976: 166. Boury-Esnault and van Beveren (1982): 24–27, figs. 5, 6. Desqueyroux & Moyano 1987: 47. Desqueyroux-Faúndez 1989: 102, pl. 1, figs. 1a– d, pl. 5, figs. 26–28. Sarà et al . 1990: 252. Barthel et al . 1990: 122, 1997: 47. Gutt and Koltun 1995: 230. Cattaneo-Vietti et al . 1999: 540. Synonymy: Craniella leptoderma (Sollas, 1886) : Kirkpatrick 1908: 4–6, pl. 11, figs. 4–14. Campos et al. 2007a: 692–694, figs. 21–29, tab. 1. Tethya stylifera Lendenfeld, 1907: 84 –87, pl. XVI, fig. 5–12. Tetilla grandis Sollas, 1886: 180 . Sollas 1888: 10, pl. 5, figs. 1, 2, 4–14. Lendenfeld 1903: 20, 1907: 69, pl. 15, figs. 10–18. Tetilla grandis var. alba Sollas, 1886 . Sollas 1888: 13, pl. 5, fig. 3. Lendenfeld 1903: 21. Material. 7 specimens from station 048-1 (SMF 11760–11763), 602.1 m , 70° 23.94' S , 8° 19.14' W , 12.01.2008 . Description. Specimens globular, mainly fragmentary sponges with diameters 0.5 to 10 cm . Surface smooth. Very firm. Two specimens encrusting on Haliclona (Gellius) cf. flabelliformis (Ridley & Dendy, 1886) (see Fig. 19 A). Spicules oxeas of up to about 4000 µm in length. Triaenes concentrated in the ectosome, up to 6000 µm long. Sigmaspires 10 to 20 µm length, very abundant within the tissue. Remarks. The characters of the Tetillidae sampled during SYSTCO I expedition correspond well to the very detailed descriptions by Sollas (1888) and Boury-Esnault and van Beveren (1982). The species is one of the most common sponges on the Antarctic shelf and has a wide distribution area, covering wide areas of the Southern Ocean, including areas in Argentina , Kerguelen and New Zealand (Van Soest et al . 2012a). By attributing the species to the genus Tetilla we follow the World Porifera Database (Van Soest et al . 2012a).