A new (Annelida, Capitellidae) species from Korean waters, with genetic comparison based on three gene markers.

, collected from the sublittoral muddy bottom of Korean waters, is described as a new species. The Korean new species closely resembles Hutchings & Rainer, 1979 in the chaetal arrangement and the details of abdominal segments, but differs in the position of genital pores and the absence of eyes. DNA sequences (mtCOI, 16S rRNA, and histone H3) of the new species were compared with all the available sequences of species in the GenBank database.

A new species of the genus Dudich, 1931 from the South Korea, with molecular evidence (Crustacea, Tanaidacea, Tanaididae).

Two populations of new species are described for Dudich, 1931 from the southeastern coast and Jeju island of South Korea (north west Pacific). The specimens were collected using a light trap set overnight at the entrance near a pier or harbour. is clearly differentiated from other species in the genus by the uropod with five articles, a maxillule palp with four distal setae, the maxilliped coxa with three proximal setae, the epignath with short and blunt spiniform seta, the propodus of pereopods 2-3 with three ventral setae, and the maxilla with a rugged shape of the distal margin.

A new genus and species of Sphyrapodidae (Crustacea, Peracarida, Tanaidacea) from the southern coast of the South Korea.

(Tanaidacea, Sphyrapodidae) is described from the southern coast of Korea (NW Pacific). The genus is included in the subfamily Sphyrapodinae , 1980 by having a mandible lacking a palp. It has a close affinity with the genus Bamber & Marshall, 2013 in the third pereonite having lateral pointed apophyses, the antennule of males with fringes of aesthetascs on articles 1 and 2 of the outer flagellum and the antenna with an elongate article 2.

A new species of from the Korean subtidal waters with notes on the taxonomic status of the genus (Annelida, Capitellidae).

, collected from the sublittoral muddy bottom in southern Korea, is described as a new species. The taxonomic status of the monospecific genus has been a subject of controversy for many years, as its characteristics overlap those given in recent generic definitions of . The results of a comprehensive review and comparison regarding the two genera, based on previous records showed minor differences.

Two new species in the genus Drumm & Heard, 2011 (Crustacea: Tanaidacea: Kalliapseudidae) from the southwestern and southern coasts of Korea.

Two new species of Phoxokalliapseudes from the southwestern and southern coasts of Korea are described. Phoxokalliapseudes aculeatus n. sp.

Two new species of the deep-sea genus Parameiropsis (Copepoda: Harpacticoida) from the eastern central Pacific.

Two new species of Parameiropsis are herein described that were identified from the Korean Deep Ocean Study (KODOS) in the Clarion-Clipperton Fracture Zone, located in the eastern central Pacific. Parameiropsis kodosensis n. sp.

Description of two new species of Neotanais Beddard, 1886 (Crustacea, Tanaidacea) from KODOS area.

Two new species of Neotanais Beddard, 1886 are described from the Korea Deep Ocean Study (KODOS) area in the Clarion-Clipperton Fracture Zone, based on the collections performed on board R/V Onnuri from a depth of 5180 m. Neotanais triqueturus n. sp.