Dysidea chujaensis, 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 : 46

7. Dysidea chujaensis n. sp. ( Fig. 11 ) Ṫḣqljqḓợ

Type specimen. Holotype (NIBRIV0000895367), Korea: Jeolmyeongyeo, Chujado, Chuja-myeon , Jeju-si , Jejudo, 1 July 2004, intertidal zone, by H. S. Kim, SCUBA diving, depth 25 m, deposited in the NIBR.

Description. Thick encrusting mass sponge, size up to 10 × 6 × 4.5 cm. Surface, rough with sharp large conules. Oscules not present. Fibres easily separate from sponge body. Color in life, beige. Texture soft and compressible. Skeleton: All fibres cored with very small sands and fibres with wide intervals ( Fig. 11C ) and arranged regularly. Primary fibres, 200 - 500 μm in diameter. Secondary fibres, 150 - 250 - 400 μm in diameter. All fibres have simple arrangement.

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

Remarks. This new species is very similar to genus Pleraplysilla in the shape of sponge surface with thick spinelike conules, but differs in skeletal fibres. Fibres of the new species are not branched type. Simple skeleton is arranged regularly. All fibres are evenly cored with very small sands.

Figures

Fig. 11. Dysidea chujaensis n. sp. A, external morphology; B, surface close up under the dis- secting microscope; C, skeletal structure under the dissecting microscope; D, thin secondary fibres; E, skeletal structure; F, primary and secondary fibres cored with small sands; G, H, primary and secondary fibres. Scale bars: A =2 cm, B =5 mm, C=2 mm, D, E=200 μm, F-H=100 μm.