title: Description of three new Tetranchyroderma gastrotrichs (Macrodasyida: Thaumastodermatidae) from South Korea.
abstract: The present paper deals with description of three new marine gastrotrich species belonging to the genus Tetranchyroderma with a new record for Korea of T schizocirratum Chang, Kubota & Shirayama, 2002, on the basis of specimens from the Korean coast. Tetranchyroderma anisoankyrum sp. nov. is differentiated from congeners by its dorsal cuticular armature of pentancres with central tine longer than the others, a pair of rod-like cephalic tentacles, 2 cirratum-type TbDL, 13-14 cirratum-type TbL per side, and a pair of TbL. Tetranchyroderma coreense sp. nov. is distinguished from other pentancrous species by cirratum-type tubes of 2 TbDL, one TbL, 3-4 TbVL, paired foot-type TbV, and absence of cephalic tentacles. Tetranchyroderma oblongum sp. nov. is characterized by the character combination of cuticular armature of tetrancres, 7 dorsolateral and 7-9 lateral cirratum-type tubes, and 33-38 TbVL along whole body. This brings the total number of species in the genus Tetranchyroderma known from South Korea to 12.
authors.affiliation: Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, Ansan 426-744, Korea. leejm@kiost.ac
authors.forename: Jimin
authors.initials: J
authors.lastname: Lee
authors.forename: Dongsung
authors.initials: D
authors.lastname: Kim
authors.forename: Cheon Young
authors.initials: CY
authors.lastname: Chang
mesh_terms: D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D056890:Eukaryota / Q000145:classification* / Q000254:growth & development; D009929:Organ Size; D056910:Republic of Korea