Artemisina apollinis ( Ridley & Dendy, 1886 )

Schejter, Laura, Cristobo, Javier & Ríos, Pilar, 2024, New records of demosponges (Porifera) from the South Orkney Islands (Antarctica) with a checklist for the region, Zootaxa 5403 (4), pp. 401-430 : 407-408

Artemisina apollinis ( Ridley & Dendy, 1886)

( Fig 3a–e )

Restricted synonymy: Amphilectus apollinis Ridley & Dendy, 1886 ; Artemisina dianae Topsent, 1907 .

Material examined: 4 specimens collected in stations 1 ( SOI; 60°28'S, 46°29'W; 139 m; 19/2/2014; MACN-In 44357; IEO-CSIC Col.), 4 ( SOI; 60°55'S, 44°04'W; 256 m; 2/3/2014; MACN-In 44358) and 18 ( SOI; 60°47,561'S, 45°36,854'W; 96 m; 10/3/2012; MACN-In 44356; IEO-CSIC Col.) .

Description: Massive slightly digitate specimen, cavernous in aspect, brown colour ( Figure 3a ). Spicules are: megascleres: thick styles of 530–700 µm by 10–40 µm and long and thin ectosomal styles of 450–520 µm by 5 µm; microscleres: toxas with spined ends 480–640 µm and small isochelae 15–20 µm ( Figure 3b–e ).

Remarks: This species was previously recorded in Antarctic and subantarctic waters by Topsent (1908), Koltun (1964), Ríos et al. (2004), Ríos (2006), Fernández et al. (2021), among others. This represents the first record for the SOI.

Figures

FIGURE 3. a–e. Artemisina apollinis. a. general morphology, scale: 7 cm; b. thick style, scale: 120 µm; c. ectosomal style, 100 µm; d. toxa, scale: 350 µm; e. isochelae, 20 µm; f–j. Artemisina plumosa. f, general morphology, scale: 15 mm; g. principal style, scale 115 µm; h. ectosomal style, scale: 65 µm; i. toxa, scale: 50 µm; j. isochelae, 10 µm; k–n. Clathria (A.) nidificata, k. general morphology, scale: 3 cm; l. style, 200 µm; m. toxa, scale: 300 µm; n. detail of one dried branch, scale: 3 mm.