Epizoanthus inazuma

Diagnosis. Morphology. Polyps connected by thin, under-developed coenenchyme on eunicid worms belonging to family Eunicidae. Maximum diameter of polyps approximately 4 mm, maximum height approximately 5 mm in situ. Epizoanthus inazuma sp. n. has 20 - 22 tentacles that are cylindrical and either as long or longer in comparison to oral disk diameter. Internal anatomy. While the 5 th mesentery from dorsal directive is obviously a complete mesentery (macrocnemic arrangement), the 6 th mesentery is also a complete mesentery (Figure 2 b). Azooxanthellate. Mesogleal thickness approximately 75 µm. Cnidae. Holotrichs, basitrichs, microbasic p-mastigophores, spirocysts (see Table 1 into this paper, Figure 3).

Etymology. Epizoanthus inazuma sp. n. is named after the Japanese word ' inazuma' meaning ' lightning', as colonies of this species are attached to eunicid worm tubes, and the worm tube shape resembles a classic lightning-bolt shape. Common Japanese name. ' Inazuma-yadori-sunaginchaku' (new Japanese name).

Material examined. Holotype. NSMT-Co 1574 (MISE-HK 54), 26 ° 30 ' 18.3 " N, 127 ° 51 ' 02.3 " E, Cape Manzamo, Onna Village, Okinawa, Japan, depth 24 m, collected by Hiroki Kise, July 21, 2014, divided in two pieces, one portion fixed in 99.5 % EtOH and the other in 5 - 10 % saltwater formalin, deposited in National Museum of Nature and Science, Tokyo, Japan. Paratype 1. RMNH 42100 (MISE-HK 9) 26 ° 30 ' 18.3 " N, 127 ° 51 ' 02.3 " E, Cape Manzamo, Onna Village, Okinawa, Japan, depth 25 m, collected by James D. Reimer, October 21, 2008, fixed in 99.5 % EtOH, deposited in Naturalis Biodiversity Center, Leiden, The Netherlands. Paratype 2. USNM 1296757 (MISE-HK 66) 26 ° 26 ' 26.5 " N, 127 ° 42 ' 43.7 " E Cape Zanpa, Yomitan Town, Okinawa, Japan, depth 34 m, collected by Hiroki Kise, August 5, 2014, fixed in 99.5 % EtOH, deposited in Smithsonian Institution National Museum of Natural History, Washington, D. C., USA. Other material. MISE-HK 43 26 ° 30 ' 18.3 " N, 127 ° 51 ' 02.3 " E, Cape Manzamo, Onna Village, Okinawa, Japan, depth 30 m, collected by Hiroki Kise, April 5, 2014, fixed in 99.5 % EtOH.