Sarcotragus dentilus, Sim & Lee & Kim, 2016

Sim, Chung Ja, Lee, Kyung Jin & Kim, Hyung June, 2016, Ten new species of genus Sarcotragus (Demospongiae: Dictyoceratida: Irciniidae) from Korea, Journal of Species Research 5 (3), pp. 443-458 : 450-452

6. Sarcotragus dentilus n. sp. ( Fig. 7 )

Type specimen. Holotype (NIBRIV0000325794), Korea:

Munseom, Seogwipo­si , Jeju­do, 10 Feb 2002, Lee KJ, by SCUBA , Depth 25m, deposited in the NIBR .

Description. Hemispherical mass, size up to 12 × 9 × 4 cm. Surface, sharp conules covered with thin perforated filamentous membrane. Fine fasciculate fibres appeared under membrane. Several oscules open on sponge surface, 1­5 mm in diameter. Colour pale gray and beige in life. Texture firm and compressible.

Skeleton: Primary fibres loose fascicles, 400-1000 μm in diameter, with numerous perforations. Fasciculate or porous secondary fibres branched out. Bridge form of secondary fibres, 50-200 μm in diameter. Filaments, 3-5 μm in diameter, terminal knobs, 10-12 μm in diameter. Fibres difficult to separate from filaments.

Etymology. This species name dentilus is named after teeth­like surface conules.

Remark. This new species is characterized by perforating membrane with numerous opening. Loose fasciculate primary fibres have numerous perforation.

Figures

Fig. 7. Sarcotragus dentilus n. sp. A, entire animal; B, closed surface; C, surface filamentous membrane with pore; D, subsurface thin pri­ mary and secondary fibres; E, fasciculate secondary fibres; F, primary fibres fascicle; G, thin primary fibres; H, primary and branched sec­ ondary fibres. Scale bars:A =2 cm, B=20cm, C­H=100 μm.