Sarcotragus mureungensis, 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 : 452

8. Sarcotragus mureungensis n. sp. ( Fig. 9 )

Type specimen. Holotype (NIBRIV0000325796), Korea: Mureungachi, Daejeong­eup, Seogwipo­si , Jeju­do, 19 Aug 2015, Moon SE, by SCUBA, Depth 20 m, deposited in the NIBR.

Description. Massive, size up to 13 × 11 × 4.5 cm. Surface covered with filamentous membrane and sharp conules. Filaments wrapped fibres loosely, and filamentous membrane mixed with spicules. Between primary fibres appeared rare branched fibres under membrane. Oscules scattered over sponge surface. Colour in life, gray on outside of sponge and white inside. Texture soft and compressible. Choanosome lacunose.

Skeleton: Primary fibres, 500­1600 μm in diameter, loose and cylindrical fascicles, which filled with wads of filaments. Bridge form of secondary fibres, 100-300 μm in diameter. Under surface membrane, thin branched secondary fibres appeared rarely, and thick subdermal skeletal fibres not appeared. Filaments, 3-6 μm in diameter, terminal knobs, 8­13 μm in diameter.

Etymology. This species is named after the type locality Mureungachi, Jeju­do.

Remark. This new species is distinguished by its rare subdermal branched secondary fibres.

Figures

Fig. 9. Sarcotragus mureungensis n. sp.A, entire animal; B, closed surface; C, primary fibres fascicle; D, branched secondary fibres; E, sec­ ondary fibres; F, secondary web. Scale bars: A=2 cm, B=15 cm, C=200 μm, D-F=100μm.