Pseudosuberites montiniger ( Carter, 1880 )

Morozov, Grigori, Sabirov, Rushan & Zimina, Olga, 2019, Sponge fauna of the New Siberian Shoal: biodiversity and some features of formation, Journal of Natural History 52 (47 - 48), pp. 2961-2992 : 2977

Pseudosuberites montiniger ( Carter, 1880)

( Figure 10 (a – d))

Suberites montiniger Carter 1880, p. 256 – 257; Vosmaer 1882, p. 31 – 32; pl. I, fig. 26; pl. IV,

figs 137 – 139; Koltun 1966, p. 96 – 97, fig. 69; pl. XXIV, fig. 3; pl. XXXIII, figs 1 – 2 Pseudosuberites montiniger: Hentschel 1916, p. 6 – 7; Hentschel 1929, p. 870, 927 Stylotella gorbunovi: Rezvoi 1931, p. 510 – 512, figs 3 – 5

Description

( Figure 10 (a – b)). Sponge massive, laterally flattened, about 5 cm in height and 4 cm in width. Surface even. The consistency is dense, but quite elastic. The single osculum, surrounded by the short spicular collar, opens at the summit. Colour ash grey. One specimen examined.

Skeleton

( Figure 10 (c)). Skeleton of irregular form and composed of numerous disorderly scattered short spicula-bundles and single spicules. Only near the surface do bundles become arranged radially, forming a distinct brush of spicules.

Spicules

( Figure 10 (d)). Tylostyles often slightly sinuous, rather sharply pointed, with weakly pronounced basal swelling, dimensions: 264.7 – 313.3 – 363.7 (n = 30) × 3.9 – 5.3 – 6.5 (n = 20) µm.

Distribution

The Greenland and Norwegian seas, Barents Sea (south-west of Novaya Zemlya, near northern tip of Kanin Peninsula, Spitsbergen), East Siberian Sea ( Bennett Island , st. A-30), Chukchi Sea, Bering Sea, Sea of Okhotsk, Strait of Tartary . Depth range: 10 – 426 m.

Figures

Figure 10. Pseudosuberites montiniger: (a, b) habitus; (c) cross section; (d) scanning electron microscope (SEM) image of subtylostyle.