Parvipalpus, Jung & Yoon, 2015

Jung, Tae Won & Yoon, Seong Myeong, 2015, New records of Nuuanuidae (Crustacea: Amphipoda: Senticaudata) from Korean waters, with descriptions of one new genus and two new species, Journal of Natural History 50, pp. 1045-1072 : 1048

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 ).