Dysidea mukriensis, Kim & Lee, 2023

Kim, Young A & Lee, Kyung Jin, 2023, Seven new species of genus Dysidea (Demospongiae: Dictyoceratida: Dysideidae) from Korea, Journal of Species Research 12 (1), pp. 38-47 : 41

5. Dysidea mukriensis n. sp. ( Fig. 8 ) ậƞqljqḓợ

Type specimen. Holotype (NIBRIV0000895365), Korea: Muk-ri, Chuja-myeon, Jeju-si , Jejudo, 24 February 2005, intertidal zone, deposited in the NIBR.

Description. Thick encrusting mass sponge, with several seeweeds, animals and stones attached to sponge surface, size up to 9 × 7.5 × 2.3 cm. Thin pigmented membrane with distinct short conules. Oscules, open over the surface, 1 - 4 mm in diameter. Color in life black, grayish brown in alcohol. Texture firm and compressible.

Skeleton: Numerous thin translucent fibres, rarely cored with detritus except near conules ( Fig. 8D ), with mostly no cored fibres near surface membrane. Primary fibres, 150 - 250 μm in diameter, densely cored with small and large sands only at the end of conules and few other sections. Primary fibres in most areas rarely cored with sands. Secondary fibres, 70 - 100 - 150 μm in diameter, rarely cored with detritus. Some fibres with no cored resembling wood bark, make it difficult to distinguish between primary and secondary fibres.

Etymology. The species name, mukriensis , is named after type locality Mukri, Chujado, Jejudo.

Remarks. This new species is similar to Dysidea corallina Kim et al., 2020 in distinct dense surface conules, but differs in sponge shape and skeletal structure. Color of this new species is brown.

Figures

Fig. 8. Dysidea mukriensis n. sp. A, external morphology; B, surface close up; C, regular sharp conules at the surface un- der the dissecting microscope; D, primary fibres cored with large sands; E, rarely cored sec- ondary fibres; F, primary fibres cored with sands near conules; G, H, primary and secondary fibres difficult to distinguish. Scale bars: A=2 cm, B=1 cm, C=1 mm, D-H =100 μm.