• Animal Systematics, Evolution and Diversity
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• v.39 no.4
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• pp.218-247
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• 2023

In our ongoing efforts to explore the species diversity of the harpacticoid fauna in Korea, we present findings on four newly identified species from family Tegastidae Sars, 1904. Although this family is frequently encountered in phytal communities, the diversity of tegastid copepod species within Korean waters largely remains to be elucidated. Drawing from our collections of tegastid harpacticoids from Chuja-do and Geomun-do Islands, we provide morphological descriptions for Tegastes lobus sp. nov., T. tresetosus sp. nov., T. pilosus sp. nov., and Syngastes acutus sp. nov., and propose their taxonomic relationships in relation to other species within the genus. Finally, we update the list of tegastid harpacticoids found in Korea and provide a key for identifying the six confirmed species from this region.

• Animal Systematics, Evolution and Diversity
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• v.33 no.1
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• pp.17-25
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• 2017

Two marine gastrotrich species of the genus Acanthodasys, A. ericinus Lee, 2012 and A. comtus Lee, 2012, are taxonomically reconsidered. Both of them were originally described based on the specimens from intertidal or sublittoral sandy bottom of the Yellow Sea and Jeju Island, South Korea, and included in a monographical publication of in 2012. However, the description of them was quite insufficient, and designations of type specimens were entirely lacking. In this study, we make a subsequent designation of type specimens for the two Acanthodasys species, and carry out a full redescription of them with additional remarks on their morphological micro-characteristics by scanning electronic microscopy. Some brief nomenclatural notes on Korean marine gastrotrichs are also provided.

• Animal Systematics, Evolution and Diversity
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• v.17 no.2
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• pp.229-243
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• 2001

Two marine harpacticoid species, Phyllothalestris sarsi Sewell, 1940 and Dactylopusia falcifera Willey, 1935 belonging to family Thalestridae are redescribed from South Korea, on the basis of the specimens of both sexes mainly from the washings of macroalgae at littoral rocky shore or sublittoral bottom sediments during the period from 1994 to 2000. They are new to Korean fauna, and this report is the first record for them in the Pacific Ocean.

• Animal Systematics, Evolution and Diversity
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• v.37 no.3
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• pp.219-224
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• 2021

A hesionid species, Leocratides kimuraorum Jimi, Tanaka and Kajihara, 2017 is newly reported from the sublittoral zones (100 m depth) of the Korean coasts. This species is characterized by lateral antennae as long as the palps, peristomial membrane without papillose, peristomial dorsolateral tubercles with two round marginal lobes, and pharyngeal with terminal papillae. The intra-specific genetic distance among the cytochrome c oxidase subunit I(COI) sequences of L. kimuraorum specimens from Japan (type locality) and Korea (this study) was in the range of 0.002-0.005. The inter-specific genetic distance between L. kimuraorum and other hesionid species were 0.166-0.307. The present study is the first record of Leocratides species in Korean fauna. This paper also provides a morphological description and photographs of L. kimuraorum, with partial sequences of the mitochondrial COI based on Korean specimens.

• Animal Systematics, Evolution and Diversity
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• v.15 no.1
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• pp.107-118
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• 1999

Eight tardigrade species belonging to the genus Batillipes are recorded from the intertidal and shallow sublittoral sands at 29 localities in South Korea. Batillipes rotundiculus n. sp. is characteristic in having the round caudal protrusion and the blister-like lateral body protuberance between legs III and IV. Five species (B. pennaki Marcus, B. similis Schulz, B. tridentatus Pollock, B. crassipes Tchesunov and Mokievsky, and B. philippinensis Chang and Rho), newly known to Korean fauna, are briefly remarked with illustrations. A key to the eight species of the batillipedid tardigrades from Korea is prepared.