동아시아 해양 간극수에 서식하는 등각류의 분류 및 분자적 다양성에 관한 연구

Abstract

Most of isopods living in open water have relatively large body compared to their meiobenthic relatives, especially the interstitial isopods of the suborder Microcerberidea. Animals belonging to this suborder have tiny (meiobenthic scale), slender and elongated bodies, allowing them to move through narrow spaces. There are only three taxonomic studies concerning Microcerberidea from the East Asia, and they involve Japanese marine interstitial. The interstitial isopods so far received little attention during the survey of the meiobenthic fauna of Korea. Recently, a new Coxicerberus species was collected from several localities on the East Coast of the Korean Peninsula. This study aims to describe the new species. The same species has also been collected from Hokkaido Island (Japan). The new species closely resembles C. fukudai (Ito, 1974) also known from Hokkaido Island, with few, but prominent morphological difference in the length ration of segments, and chaetotaxy of the first two appendages, In order to compare the two new species we borrowed the type material of C. fukudai and here present a short redescription of this species. Beside detail study of morphological characters we also use mitochondrial COI sequences from the Korean and Japanese population of the new species to study potential cryptic speciation and divergence rates. The result of our phylogenetic analysis indicate the existence on more species in Korea. Which remains cryptic since we were not able to detect any morphological differences so far. Our sequences are the first such data on the GenBank for the entire suborder.