A new species of the genus Pseudocrangonyx (Crustacea, Amphipoda, Pseudocrangonyctidae) from Korea

Chi-Woo Lee; Ko Tomikawa; Takafumi Nakano; Gi-Sik Min

doi:10.3897/zookeys.735.21697

A new species of the genus Pseudocrangonyx (Crustacea, Amphipoda, Pseudocrangonyctidae) from Korea

Zookeys. 2018 Feb 6:(735):27-44. doi: 10.3897/zookeys.735.21697. eCollection 2018.

Authors

Chi-Woo Lee¹, Ko Tomikawa², Takafumi Nakano^{2

3}, Gi-Sik Min¹

Affiliations

¹ Department of Biological Sciences, Inha University, Incheon 22212, South Korea.
² Department of Science Education, Graduate School of Education, Hiroshima University, Higashihiroshima 739-8524, Japan.
³ Present address: Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.

Abstract

A new subterranean species of pseudocrangonyctid amphipod, Pseudocrangonyx daejeonensissp. n. is described from the interstitial waters in Daejeon, Korea. Pseudocrangonyx daejeonensissp. n. is distinguished from three morphologically similar congeners, P. coreanus Uéno, 1966, P. febras Sidorov, 2009, and P. gudariensis Tomikawa & Sato, 2016, by the characteristics of antenna 1, antenna 2, mandible, gnathopod 2, pleopods, uropods 1-2, and telson. Molecular phylogenetic analyses based on nuclear 28S rRNA and histone H3, and mitochondrial cytochrome c oxidase subunit I and 16S rRNA genes revealed that P. daejeonensis is a sister species of the unnamed Pseudocrangonyx sp. 3 inhabiting central Japan.

Keywords: Crangonyctoidea; Korean Peninsula; interstitial water; molecular phylogeny.