Hypselodoris shimodaensis Baba, 1994
Description
The body is translucent pale purple, with the outer margin of the mantle outlined by a fine white line.A white middorsal line runs from between the rhinophores back to the gill, encircling the branchial opening, and a second white line continues along the midline of the tail.
The rhinophore stalks are the same pale purple as the body, while the clubs are translucent orange.
The gills are pale purple at the base with translucent orange branches.
Body length reaches about 40 mm.
Distribution
Known from Japanese waters, with the type locality at Shimoda on the Izu Peninsula and additional records along the Pacific coast of Honshu.Etymology
The specific epithet shimodaensis means "from Shimoda", referring to the type locality on the Izu Peninsula of Japan.Remarks
Described by Kikutaro Baba in 1994 as one of four new, rare, or previously unrecorded Japanese species of Hypselodoris (Venus 53(3): 175-187).The species was subsequently treated by a 1999 revision in their monograph of Indo-Pacific Hypselodoris and in a molecular revision in their molecular phylogeny of the Chromodorididae, both of which support its current generic placement.
References
- Hypselodoris shimodaensis, Baba, K. (1994). Descriptions of four new, rare or unrecorded species of Hypselodoris (Nudibranchia: Chromodorididae) from Japan. Venus. 53(3): 175-187. page(s): 175
- Hypselodoris shimodaensis Baba, 1994, Gosliner T.M. & Johnson R.F. (1999). Phylogeny of Hypselodoris (Nudibranchia: Chromodorididae) with a review of the monophyletic clade of Indo-Pacific species, including descriptions of twelve new species. Zoological Journal of the Linnean Society. 125: 1-114. https://doi.org/10.1111/j.1096-3642.1999.tb00585.x
- シモダイロウミウシ, 鈴木敬宇. (2000). ウミウシガイドブック〈2〉. TBSブリタニカ.
- シモダイロウミウシ, 中野理枝. (2004). 本州のウミウシ. ラトルズ.
- シモダイロウミウシ, 小野篤司 & 加藤昌一. (2009). ウミウシ. 誠文堂新光社.
- Hypselodoris shimodaensis, Johnson R.F. & Gosliner T.M. (2012). Traditional taxonomic groupings mask evolutionary history: a molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479.
A Kindle field guide by the site author
Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition.
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Photos of Hypselodoris shimodaensis
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.