Jorunna rubescens (Bergh, 1876)
- Location
- Cape Maeda, Okinawa Island (Onna and Yomitan area), Okinawa, Japan
- Date
- 2010/06/18
- Length
- 50mm
- Depth
- 7.0m
- Water temperature
- 27.0℃
Description
A large dorid, reaching about 11 cm in length in life. Ground colour pale greyish-red, with rather short, irregular blackish-blue longitudinal streaks on the body and stronger streaks descending from the rim down the sides of the gill mound. The gills, rhinophore sheaths, mouth tube and genital papilla are darker. The dorsum is very finely shagreened. The mantle is broadly arched and projects forward over the head and laterally up to 8 mm, completely covering the foot. The gill comprises seven tripinnate leaves up to 1 cm tall; the rhinophore club is about 4 mm with roughly 30 thin lamellae. The penis is armed with a long, straight aculeus — a striking feature of the species.Distribution
Type locality: Aibukit, Palau Islands (Mare palaense). The species is now known to range widely across the Indo-West Pacific as a large dorid.Etymology
The specific epithet rubescens is the present participle of Latin rubesco ("to become red, redden"), referring to the reddish living colour highlighted in the original diagnosis.Remarks
Originally placed as the type species of the new genus Kentrodoris; later transferred to Jorunna. The Japanese name "Bûche de Noël umiushi" alludes to the species' resemblance to the log-shaped Christmas cake.References
- Kentrodoris rubescens, Nudibranchs and Sea Snails: Indo-Pacific Field Guide
- ブッシュドノエルウミウシ, 益田一. (1999). 海洋生物ガイドブック. 第2刷. 東海大学出版会.
- ルベスケンス, 小野篤司. (1999). ウミウシガイドブック. TBSブリタニカ.
- ヨルンナ・ルベスケンス, 殿塚孝昌. (2003). ウミウシガイドブック〈3〉. TBSブリタニカ.
- ブッシュドノエルウミウシ, 小野篤司. (2004). 沖縄のウミウシ. ラトルズ.
- Jorunna rubescens, Helmut Debelius, Rudie H. Kuiter. (2007). Nudibranchs of the World.
- Jorunna rubescens (Bergh, 1876), Camacho-Garcia Y.E. & Gosliner T.M. (2008). Systematic revision of Jorunna Bergh, 1876 (Nudibranchia: Discodorididae) with a morphological phylogenetic analysis. Journal of Molluscan Studies. 74(2): 143-181. https://doi.org/10.1093/mollus/eyn002
- Jorunna rubescens, Terrence Gosliner, Ángel Valdés and David Behrens. (2018). Nudibranch and Sea Slug Identification Indo-Pacific 2nd Edition. New World Pubns Inc.
Featured in this book
Terrence Gosliner, Ángel Valdés and David Behrens. (2018). Nudibranch and Sea Slug Identification Indo-Pacific 2nd Edition. New World Pubns Inc.
New World Publications
This species, Jorunna rubescens, is included in the book.
View on Amazon PR (Amazon Associates)Seasonality
Shooting Locations
Loading shooting locations...
Photos of Jorunna rubescens
Tag:
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.