Ed A. Hendrycks

A new species of Socarnes Boeck, 1871 (Crustacea, Amphipoda, Lysianassidae) from Korean waters

Abstract A new species of lysianassid amphipod belonging to the genus Socarnes Boeck was collected from Korean coastal waters. This is the first record of the genus Socarnes from Korea. The new species is fully illustrated and extensively compared with related species. A key to Socarnes speciesis provided.

New genera and species of the Synchelidium group (Amphipoda: Oedicerotidae) from Asia-North Pacific

Four new species and two new genera belonging to the family Oedicerotidae are reported from Korea and Vietnam. Two new genera, Orthomanus and Imbachoculodes are described, with three new species, namely Orthomanus koreanus gen. et sp. nov., Imbachoculodes namhaensis gen. et sp. nov. and Imbachoculodes vietnamensis gen. et sp. nov. The monotypic genus Orthomanus is characterized by the very short carpi and transverse palms of gnathopods 1 and 2, the reduced dactyli on pereopods 3–6, and the greatly enlarged distolateral spine-tooth on the outer plate of maxilla 1. Imbachoculodes has slender gnathopods 1 and 2 with elongated carpi, pereopods 3 and 4 with elongated dactyli, and a narrow basis of pereopod 7. The fourth new species, Sinoediceros hwanghaensis sp. nov. has a greatly reduced flagellum on antenna 2, a broadened meri on pereopods 3 and 4, and an elongated maxilliped outer plate. Keys are provided to 1) the North Pacific genera of the Synchelidium group, 2) species of Imbachoculodes, and 3) species of Sinoediceros.

The family Hyalidae (Crustacea: Amphipoda: Talitroidea) from Korean waters. 1. Genus Ptilohyale Bousfield & Hendrycks, 2002

Five species of the genus Protohyale belonging to the family Hyalidae were collected from shallow coastal waters of Korea. Prior to our study, only two species, P. (Boreohyale) pumila (Hiwatari & Kajihara, 1981) and P. (B.) triangulata (Hiwatari, 2003) had been reported from Korea. One of the collected species, Protohyale (B.) magnaocularis is identified as a new species. The morphology of the eyes, antenna 1, gnathopod 2, uropods and telson are the major characteristics which differentiate P. (B.) magnaocularis sp. nov. from its congeners. The remaining two species, P. (B.) kajiharai (Hiwatari, 2003) and P. (B.) latimana (Hiwatari, 2003) are recorded for the first time from Korea. Protohyale (B.) kajiharai, P. (B.) latimana and P. (B.) magnaocularis sp. nov. are fully described and illustrated. A key to the species of Protohyale (B.) from Korea is also provided.