Elysia amakusana Baba, 1955
Description
A species of Elysia with an elongate body bearing a pair of rolled rhinophores on the head and a pair of lateral extensions of the dorsum (parapodia) along each side.Distribution
Japan. The material on which Baba 1955 based the new species came from Sagami Bay and Amakusa (Kyushu); the same specimens had been figured as Elysia japonica by Baba 1949 before being redescribed as Elysia amakusana.Etymology
The specific epithet amakusana is a Latin adjective meaning "of Amakusa", referring to the Amakusa region on the western coast of Kyushu, Japan.Remarks
Elysia abei Baba, 1955 is treated as a junior synonym of this species (Trowbridge et al. 2011; Takano et al. 2013). Using COI and 16S rRNA sequences, Takano et al. 2013 recovered E. abei and E. amakusana in a single well-supported clade. The earlier synonymisation with Elysia japonica Eliot, 1913 proposed by Jensen 1985 and accepted by Baba 1990 was not supported by the same study: a specimen referred to as Elysia cf. japonica fell as sister to the E. abei / E. amakusana clade. The original description of E. japonica is too vague in both locality and morphology for unambiguous recognition.References
- アズキウミウシ, アベミドリガイ, Baba K. (1949). Opisthobranchia of Sagami Bay collected by His Majesty the Emperor of Japan (相模湾産後鰓類図譜). Iwanami Shoten, Tokyo. 4+2+194+7 pp., pls. 1-50.
- Elysia (Elysia) amakusana BABA, 1955 Azuki-umiushi, Baba K. (1957). THE SPECIES OF THE GENUS ELYSIA FROM JAPAN. Publications of the Seto Marine Biological Laboratory. 6(1): 69-74. https://doi.org/10.5134/174573
- アズキウミウシ, アベミドリガイ, 鈴木敬宇. (2000). ウミウシガイドブック〈2〉. TBSブリタニカ.
- 高岡生物研究会. (2002). 日本海のウミウシ. 第2版.
- アズキウミウシ, 中野理枝. (2004). 本州のウミウシ. ラトルズ.
- Elysia abei, Trowbridge C.D., Hirano Y.M., Hirano Y.J., Nishida K. & Sudo K. (2011). North-west Pacific sacoglossan guild associated with filamentous green algae (Family Cladophoraceae and Family Boodleaceae). Marine Biodiversity Records. 4: e67. https://doi.org/10.1017/S1755267211000170
- Takano T., Hirano Y.M., Trowbridge C.D., Hirano Y.J. & Watano Y. (2013). Taxonomic Clarification in the Genus Elysia (Gastropoda: Sacoglossa): E. atroviridis and E. setoensis. American Malacological Bulletin. 31(1): 25-37. https://doi.org/10.4003/006.031.0114
- アズキウミウシ, 中野理枝. (2018). 日本のウミウシ. 文一総合出版.
Featured in this book
中野理枝. (2019). 日本のウミウシ. 第二版. 文一総合出版.
文一総合出版
This species, Elysia amakusana, is included in the book.
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Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.