• Animal cells and systems
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• v.12 no.4
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• pp.231-240
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• 2008

The gorgonian coral Anthoplexaura dimorpha Kukenthal, 1908(Gorgonacea: Octocorallia) is abundant in Jejudo Islands, Korea. To investigate the sexual reproduction of this species, we surveyed the morphology and cycle of gametogenesis. 5-6cm long fragments from 3-7 randomly chosen colonies were collected monthly at a depth of 12-24m in the water surrounding Munseom from August 2003 to August 2005. This species was gonochoric with sex ratio of 1.86:1(female to male), and had one annual reproductive cycle affected by elevation of seawater temperature. Oogenesis was longer than spermatogenesis as 12 months in female and 6 months in male. The planulae were not observed from the field survey and histological sections, which suggested broadcast spawning for the reproductive mode in this species. The possible spawning events may occur after the seawater temperature attain to the annual peak in September.

• Animal Systematics, Evolution and Diversity
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• v.24 no.3
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• pp.327-332
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• 2008

Soft coral Dendronephthya gigantea (Verrill, 1864) is a conspicuous species dominating shallow sea waters of Jejudo Island, Korea. Recently its whole mitochondrial genome sequencing was completed by us and the sequence information provided an opportunity to test the age of Octocorallia and time of evolutionary separation between some representative orders of the subclass Octocorallia. Molecular phylogenetic analyses based on 13 mitochondrial protein encoding genes revealed a polyphyletic relationship among octocorallians representing two orders (Alcyonacea and Gorgonacea) and four families (Alcyoniidae, Nephtheidae, Briareidae, and Gorgoniidae). Estimates of divergence times among octocorallians indicate that the first splitting might occur around end of or after Cretaceous period (50-79 million years ago (Ma)). The age is relatively young compared to the long history of stony sea corals (>240 Ma). Taken together our result suggests a possible relatively recent radiating evolution at least in the order Alcyonacea and Gorgonacea. Molecular dating and phylogenetic analysis based on much broader taxon sampling and many genes might give an insight into this interesting hypothesis.

• Animal Systematics, Evolution and Diversity
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• v.21 no.2
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• pp.171-191
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• 2005

Four new species of Copepoda associated with gorgonacean corals are described from Bohol Island, the Philippines. They are Acanthomolgus longiunguifer, A. geminus, and Paramolgus incidentus in the order Cycolopoida and Humescheres boholensis n. gen., n. sp. in the order Siphonostomatoida.

• The Korean Journal of Zoology
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• v.23 no.1
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• pp.25-40
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• 1980

A systematic study of Korean Paramuriceidae was done with specimens collected from nine localities in the South Sea of Korea for the period of 1965 through 1978. The identifited Paramuriceidae was turned out to be 14 species and seven genera. They were all new to the Korean gorgonarian fauna: Bebryce indica; B. thomsoni; B. brocki; Calicogorgia granulosa; Filigella mitsukuri; Muricella abnormalis; Paracis pustulata; P. ijimai; Plecauroides reticulata; P. praelonga; P. rigida; P. complexa; Villogorgia alterans; V. antillarum.

• Animal cells and systems
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• v.1 no.1
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• pp.43-52
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• 1997

Systematic relationship of 13 species representing seven orders of anthozoans, and one hydrozoan as an outgroup, were investigated. Distance and parsimony methods were used to analyze nucleotide sequence data obtained from the 18S rDNA. The inferred phylogeny indicates that two orders, Ceriantharia and Antipatharia within subclass Ceriantipatharia, are not closely related to each other. Instead, the former appears to be the most ancestral group among anthozoans but the latter is more closely related to order Actiniaria within subclass Zoantharia. The result also indicates that the actiniarian may not be a monophyletic group, because Epiactis Japonica is related more to order Scleractinia. Subclass Octocorallia appears to be a monophyletic group, within which order Pennatulacea diversed at first, and then orders Alcyonacea and Gorgonacea diversed later.

• The Korean Journal of Zoology
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• v.24 no.2
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• pp.99-115
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• 1981

A systematic study of Korean holaxonians was done with specimens from 15 localities in the coastal seas of Korea for the period of 1965 though 1978. The holaxonians identified in the present study turned out to be 15 species representing seven genera in three familes. They were all new to the Korean gorgonarian fauna: Anthoplexaura dimorpha; Euplexaura anastomosans; E. abietina; E. crassa; E. recta; Ellisella maculata; E. rubra; E. limbaughi; Verrucella umbraculum; v. stellata; Primnoa reseda pacifica; Callogorgia pseudoflabellum; Plumarella spinosa; P. rigida; P. adhaerens.