title: A new species ofEusirusfrom Jeju Island, Korea (Crustacea, Amphipoda, Eusiridae).
abstract: A new eusirid amphipod,Eusirus bulbodigitussp. n., from Jeju Island, Korea is described with a detailed description and illustrations.Eusirus bulbodigitussp. n.shows common features with the five known eusirid amphipodsEusirus abyssiStephensen, 1944,Eusirus columbianusBousfield & Hendrycks, 1995,Eusirus hirayamaeBousfield & Hendrycks, 1995,Eusirus laticarpusChevreux, 1906, andEusirus parvusPirlot, 1934, such as the mandibular palp article 3 bearing a group of setae laterally. However, this new species is differentiated by the combination of the following characteristics: the eyes are poorly developed, the propodus on pereopod 4 is slightly shorter, the inner margin of dactylus on pereopod 4 is swollen, the length of pereopods 5-7 is moderate, the urosomite 1 has a dorsal protrusion distally, and the telson is shallowly cleft. This is the first record of the genusEusirusKrøyer, 1845 from Korean waters.
authors.affiliation: National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
authors.forename: Tae Won
authors.initials: TW
authors.lastname: Jung
authors.affiliation: National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea.
authors.forename: Min-Seop
authors.initials: MS
authors.lastname: Kim
authors.affiliation: Faculty of Marine Technology, Chonnam National University, Yeosu 59626, Korea.
authors.forename: Ho-Young
authors.initials: HY
authors.lastname: Soh
authors.affiliation: Department of Biology, Chosun University, Gwangju 61452, Korea.
authors.forename: Seong Myeong
authors.initials: SM
authors.lastname: Yoon
keywords: Amphipoda; Eusirus bulbodigitus; Korea; eusirids; new species; taxonomy