Dysidea capillus, 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

4. Dysidea capillus n. sp. ( Figs. 6 , 7 ) Ḧūqljqḓợ

Type specimen. Holotype ( NIBRIV0000895364 ), Korea: Pyeongdae-ri, Gujwa-eup, Jeju-si , Jejudo , 14 August 2019, intertidal zone (sandy beach), deposited in the NIBR.

Description. Thin encrusting sponge from under side of rock in sandy beach, with shape like small piece of a plate, size up to 7 × 3 × 1.5 cm. Surface smooth, covered with long conules and several oscules, 2 - 3 mm in diameter, open toward the sandy bottom. Color in life green. Texture soft and compressible.

Skeleton: All fibres cored with more sands than spicules, and arranged regularly. Primary fibres, 70 - 100 μm in diameter. Secondary fibres, 50 μm in diameter.

Etymology. The species name, capillus , is named after the shape of long conules on the sponge surface.

Remarks. This new species is similar to Dysiea dokdoensis Kang et al., 2020 in skeletal structure, but differs in conules of primary fibres. Surface of the new species has numerous long and distinct conules with oscules open toward the sandy bottom.

Figures

Fig. 6. Dysidea capillus n. sp. A, external morphology in situ; B, surface close up; C, D, skeletal structure; E, F, primary fi- bres near conules; G, H, secondary fibres between primary fibres. Scale bars:A=1cm, B= 1 cm, C=200 μm, D-H =100 μm.

Fig. 7. Dysidea capillus n. sp. A, B, primary fibres with surface membrane cored with sands. Scale bars:A, B=100 μm.