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e-ased.org, vol. 35, no. 2, pp.57-62, 2019

DOI: https://doi.org/10.5635/ASED.2019.35.2.042

First Finding of a Bivalve-Inhabiting Hydrozoan (Cnidaria, Hydrozoa) from Korea

Shin Kubota1,*, Jimin Lee2, Cheon Young Chang3

Affiliation: 1Turritopsis Immortal Jellyfish Regenerative Biological Research/Experience Laboratory, Nishimuro 649-2211, Japan 2Marine Ecosystem Research Division, Korea Institute of Ocean Science and Technology, Busan 49111, Korea 3Department of Biological Science, College of Natural Sciences, Daegu University, Gyeongsan 38453, Korea

Abstract: Eutima japonica Uchida, 1925, a bivalve-inhabiting hydrozoan was collected for the first time in Korea, associating with Mytilus galloprovincialis. The morphology of male medusae of this hydrozoan is clarified by culture and described as well as other developmental stages. As the present material from Korea is in good accord with that of the northern Japanese form of E. japonica, so the geographical distribution of the northern form of this species is widened, Japan, China and Korea. Green fluorescent protein distribution pattern of this medusa is also described and compared with that of the most related species Eutima sapinhoa Narchi and Hebling, 1975.

Keyword: culture, Eutima japonica, geographical distribution, green fluorescent protein, life cycle, medusan form, morphological variation, taxonomy