| Abstrakt: |
To date, specimens belonging to the genus Capitella Blainville, 1828 collected from Korean waters have been identified as C. capitata sensu Eisig, 1887 for over 35 years, depending almost totally on the description of Paik (Bull Korean Fish Soc 13:89-92, 1980), but consisted of the capitellid species examined in this study. Although the characteristics of 9 thoracic segments, thoracic chaetigers 1-7 with capillaries, and abdominal segments without branchiae or capillary chaetae correspond to C. capitata (Fabricius 1780), Korean capitellid specimens differ in a prostomium without deep dorsal depression, chaetigers 8-9 without neuropodial capillaries, chaetiger 8-9 of males without constriction, and high numbers of genital spines in males. Capitellid specimens from Korean waters resemble C. teleta Blake, Grassle & Eckelbarger, 2009 rather than C. capitata by the following morphological characteristics: presence of eyes, weak dorsal depression on prostomium, chaetigers 8-9 with neuropodial hooded hooks only, inflated chaetigers 8-9 of males, and 3-4 rows of teeth above the main fang. For precise identification of the Korean capitellid specimens, genetic analysis was performed, and the result revealed Capitella specimens of Korea genetically matched well with C. teleta of Ainan (0.4%) and Capitella spp. (0.2%) of Italy in partial cytochrome c oxidase subunit I (COI) gene comparison. Although there is little genetic difference between C. teleta from different areas, morphological differences in the shape of the prostomium and pygidium and the number of chaetae per fascicle suggest geographical variations in morphology caused by their adjacent environments. This result suggests the possibility of the existence of a species complex of C. teleta. In this study, genetic and morphological features of C. teleta of Korea are provided. In addition, a comprehensive comparison with previous records of C. capitata and C. teleta are conducted, and newly discovered intraspecific variations and the geographic distribution of C. teleta are discussed. [ABSTRACT FROM AUTHOR] |
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