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First Record of the Genus and Species, Rhopalaea crassa(Ascidiacea: Aplousobranchia: Diazonidae) in Korea

  • Seo, Su Yuan (Natural History Museum, Ewha Womans University)
  • Received : 2021.10.17
  • Accepted : 2021.10.20
  • Published : 2021.10.31

Abstract

The genus Rhopalaea Philippi, 1843 is firstly recorded as a Korean fauna. It is distinct from other genera of Diazonidae in order Aplousobranchia by having solitary individuals or at most two embedded in a common test. Solitary ascidian, Rhopalaea crassa (Herdman, 1880), is also newly reported from Korean waters. Rhopalaea crassa has a club-shaped body, developed thorax, a vertical gut loop and yellow patches in transparent test. Specimens of R. crassa examined in this study were collected from the subtidal zone of Jeju-do Island by scuba diving. In this paper, detailed descriptions and photographs of specimens and living forms of R. crassa are provided.

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