New records of Nuuanuidae (Crustacea: Amphipoda: Senticaudata) from Korean waters, with descriptions of one new genus and two new species Author Jung, Tae Won National Marine Biodiversity Institute of Korea, Seocheon, Korea; Author Yoon, Seong Myeong Department of Biology, Chosun University, Gwangju, Korea text Journal of Natural History 2015 2015-09-30 50 1045 1072 http://dx.doi.org/10.1080/00222933.2015.1103914 journal article 21286 10.1080/00222933.2015.1103914 fc8ca55e-75cf-4c1e-be46-66a4d7119b1b 1464-5262 3990181 E604D161-C386-4883-A15F-1628F2B29B7A Genus Parvipalpus gen. nov. (Korean Name: Ga-neun-chae-jjik-yeop-sae-u-sok, new) Diagnosis Head, anterior lobe developed, subrectangular; anteroventral notch developed; eyes rudimentary. Mandible, palp very reduced and bi-articulate. Antenna 1, accessory flagellum tri-articulate. Gnathopods 1, 2 subchelate, dissimilar in size and shape. Gnathopod 1, anteroventral corner of merus subacutely produced. Pereopod 7 longer than pereopod 5; basis posteriorly expanded and shield-like, posterior margin crenulate. Pleonites 1 and 2 with dorsal spines. Pleonal epimeron 1, anteroventral corner acutely produced forward. Urosomite 1 without dorsal keel. Uropod 1, peduncle with basofacial spine. Uropod 3 parviramous; outer ramus short and inner ramus minute, not reaching half of outer; inner ramus uni-articulate. Telson entire. Type species Parvipalpus holocaudatus sp. nov. (original designation by monotypy) Etymology The composite epithet of the generic name, Parvipalpus , is a combination of the Latin parvus and the Latin palpus , which means ‘ small palp ’ . This name refers to the shape of the mandibular palp, which is noticeably reduced to a small form. Gender is neuter. Remarks Parvipalpus is the monotypic new genus erected with P. holocaudatus sp. nov. , and distinguished from other genera of Nuuanuidae , such as Nuuanu and Gammarella in these points: the palp of the mandible is considerably more reduced (not reduced and linear or falcate in the last article of Nuuanu and Gammarella ) and bi-articulate (triarticulate in Nuuanu and Gammarella ), the outer ramus of uropod 3 is uni-articulate (bi-articulate and the last article is very small in Nuuanu and Gammarella ), and the telson is entire (deeply or fully cleft in Nuuanu and Gammarella ).