Coelosphaera (Coelosphaera) koltuni Schejter, Ríos & Cristobo, 2019

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 : 409

Coelosphaera (Coelosphaera) koltuni Schejter, Ríos & Cristobo, 2019

( Fig. 4a )

Material examined: 5 specimens collected at station 11 ( SOI; 60°53'S, 42°35'W; 487 m; 10/3/2014; MACN-In 41376 and MACN-In 41377; IEO-CSIC Col.; see Schejter et al. 2019) .

Description: Globular sponge attached to hard substrate by a short and narrow peduncle. The peduncle can include small stones. Surface with hollow fistules ( Figure 4a ). Spicules are anisostrongyles with asymmetrically ends 850–1300 /33–38 μm, arcuate tridentate isochelae 25–35 μm and sigmas (S and C shaped) 35–55 μm.

Remarks: See Schejter et al. (2019) for a complete characterization and discussion of this species.

Figures

FIGURE 4. a. Coelosphaera (C.) koltuni, general morphology, scale: 2 cm; b–c. Inflatella belli; b. general morphology, scale: 2 cm; c. anisotornote, scale: 200 µm; d–i. Lissodendoryx (E.) ramilobosa, d. general morphology, scale: 2 cm; e. style I, scale: 100 µm; f. style II, scale: 70 µm; g. strongyle, scale: 50 µm; h. isochelae, scale: 20 µm; i. sigmas I and II, scale: 30 µm; j–o. Lissodendoryx (E.) anacantha, j. general morphology, scale: 15 mm; k. principal acanthostyle, scale: 100 µm; l. acanthostyle II, scale: 50 µm; m. strongyle, scale: 100 µm; n. sigmas I and II, scale: 25 µm; o. isochelae, scale: 25 µm.