Demaorchestia parapacifica (Kim, Jung & Min, 2013) comb. nov.

(Fig. 8)

Platorchestia parapacifica Kim, Jung & Min, 2013: 829, figs 2–7.

Type material. Holotype, male, 19.2 mm, NIBRIVOOOO268878. Paratypes: 6 male, 5 females, NIBRIV- OOOO268879–87, same data holotype.

Type locality. Geumseongcheon Stream, Jeju-do, South Korea (33°26’N 126°17’E) .

Ecological type. Beach-hoppers.

Habitat. “Living mainly on the sandy shores around river mouths (salinity ranged between 5–20 psu). It is usually found under rotting hay or in silt beside the water.” (Kim, Jung & Min (2013).

Molecular data. 596 bp CO1 gene sequences (GenBank accession numbers KF016044 - KF016047) were obtained from four specimens of the new species .

Size. 19.2 mm, female, 13.5 mm.

Diagnosis (male). Based on Kim, Jung & Min (2013).

Gnathopod 2 propodus with midpalmar sinus; dactylus blunt or apically pinched. Epimeron 3 posterior margin smooth. Telson with 10–11 robust setae per lobe.

Remarks. Demaorchestia parapacifica is the only species in the genus with at least 10 robust setae on each telson lobe.

Distribution. South Korea. Sehwa Beach (33°31’N 126°51’E), Jeju-do, South Korea; Seomjin River (34°59’N 127°46’E), Jeollanam-do, South Korea; Osipcheon Stream (36°21’N 129°22’E), Gyeongsangbuk-do (Kim, Jung & Min, 2013).