Two new species of genus Luffariella (Dictyoceratida: Thorectidae) from Korea Author Sim, Chung Ja Department of Biological Sciences, Hannam University, Daejeon 34430, Republic of Korea cjsim@hnu.kr Author Lee, Kyung Jin Strategic Planning Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea Author Kim, Young A Korea Institute of Ocean Science & Technology, Ansan 15627, Republic of Korea text Journal of Species Research 2017 6 2 190 194 journal article 10.12651/JSR.2017.6.2.190 2713-8615 8120401 Luffariella tubula n. sp. ( Fig. 1 ) Type specimen. Holotype (NIBRIV0000305501), Munseom , Seogwipo-si , Jeju-do , 3 Sep 2012 , Eom TY , by SCUBA , depth 10 m , deposited in the NIBR . Description. Irregular small mass with tube-like branch repent form, size up to 6.5 × 4 cm . Surface covered with thin membrane, conules indistinct. Thin walled tube, 1-2 mm thick. Several vent holes, 2-5 mm in diameter, open at end of tube. Color in life yellowish beige. Tex- ture very hard and imcompressible. Sponge have a large quantity of collagen with fibres network. Skeleton: The skeleton consists of reticulation of thin-walled. Meshed network of thick primary fibres, separated from secondary and tertiary fibres ( Fig. 1C ). Primary fibres usually uncored from debris, but cored fi- bres appeared near surface membrane rarely. Primary fi- bres usually irregular shape and variable in diameter, but cored fibres, 150 μm in diameter, near surface. Uncored primary fibres, 80-200 μm in diameter, at choanosome ( Fig. 1H ), Two sizes of regular secondary fibres, 60-100 μm and 40-60 μm in diameter. Tertiary fibres, 10-15 μm in diameter ( Fig. 1C ). Fig. 1. Luffariella tubula n. sp. A, entire animal; B, closed surface; C, primary fibres separate from secondary and tertiary fibres; D, cored primary fibres near surface; E, F, choanosome skeletal structure. G, skeletal structure with collagen; H, thick branched primary fibres with secondary and tertiary fibres. Scale bars: A = 2 cm, B = 1 cm, C, D = 200 μm, E-H = 100 μm. Fig. 2. Luffariella koreana n. sp. A, entire animal; B, skeletal structure; C, surface primary fibre; D, closed skeletal structure; E, primary fibres surrounded secondary and tertiary fibres; F, secondary and primary fibres separated with each other (arrow). Scale bars: A = 3 cm, B =50 μm C-E= 100 μm, F= 50 μm. Etymology. This species is named after its tube-like shape. Remarks. This new species is very similar to the genus Hyattella in the skeletal structure of secondary fibres, but differs in lacking cored primary fibres. Thickly branched primary and tertiary fibres appeared in choanosome.