Three species of Ditrichocorycaeus (Copepoda, Cyclopoida, Corycaeidae) from Korean waters, with new identification parameters |
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Authors: | Jin Hee Wi Dae Hwan Kim Ho Young Soh |
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Institution: | 1. Department of Environmental Oceanography, College of Fisheries and Ocean Sciences, Chonnam National University, Yeosu, 550-749, Korea 2. Department of Oceanography, College of Natural Sciences, Chonnam National University, Gwangju, 500-757, Korea
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Abstract: | Three species of Ditrichocorycaeus D. dahli (Tanaka, 1957), D. lubbocki (Giesbrecht, 1981), and D. subtilis (Dahl, 1912)] are first redescribed from southern area of Jeju Island, Korea. Morphological details such as mouthparts, ornamentation of genital double-somite, spine lengths of legs, and proportional lengths of caudal setae, are provided as new identification keys separating each species within Ditrichocorycaeus and/or each genus within Corycaeidae. In particular, the number and location of each segment on the body and antenna are re-examined and precisely defined. Also, few valid morphological characters of this genus distinguishing it from other genera are newly proposed as follows: 1) prosomes of both sexes are five-segmented; 2) basis of maxilliped with relatively longer proximal seta than in other genera. |
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