Sagaminopteron ornatum Tokioka & Baba, 1964
- Location
- Nazumado, Hachijo Island, Tokyo, Japan
- Date
- 2018/10/11
- Length
- 14mm
- Depth
- 25.0m
- Water temperature
- 26.0℃
Description
A medium-sized gastropterid, 8.7-12 mm in length, and the type species of its genus. The dorsal hump is ovoid and bears two pairs of protuberances on the posterior half — the anterior pair much larger than the posterior pair. The left anterior protuberance is bifid (probably two fused protuberances); the right anterior one is the largest of all and forms the posterior part of the free mantle margin. The posterior pair are simple cones. The ctenidium consists of seven plumed leaflets.In life the animal is iridescent reddish purple overall. The free mantle margin is whitish with an orange border, and this colouration continues posteriorly into a loop that encircles all of the posterior protuberances. All protuberances are orange. The general body colour is rosy purple.
Distribution
Type locality: Miyoseno-takane of Kameki-syo, Sagami Bay, Japan, with a paratype from the rocky shore around Tōshima near the Seto Marine Biological Laboratory.Etymology
The specific epithet ornatum (Latin ornatus, "adorned", neuter form) refers to the numerous protuberances and ornate colouration. The genus name Sagaminopteron combines the place name "Sagami" (Sagami Bay) with Greek pteron ("wing").Remarks
Type species of the genus Sagaminopteron. The monophyly of Sagaminopteron is supported in subsequent Gastropteridae phylogenies.References
- Sagaminopteron ornatum n.g., n.sp., Tokioka T. & Baba K. (1964). FOUR NEW SPECIES AND A NEW GENUS OF THE FAMILY GASTROPTERIDAE FROM JAPAN (GASTROPODA : OPISTHOBRANCHIA). Publications of the Seto Marine Biological Laboratory. 12(3): 201-229. https://doi.org/10.5134/175366
- ムラサキウミコチョウ, 小野篤司. (1999). ウミウシガイドブック. TBSブリタニカ.
- ムラサキウミコチョウ, 鈴木敬宇. (2000). ウミウシガイドブック〈2〉. TBSブリタニカ.
- ムラサキウミコチョウ, 小野篤司. (2004). 沖縄のウミウシ. ラトルズ.
- ムラサキウミコチョウ, 中野理枝. (2004). 本州のウミウシ. ラトルズ.
- ムラサキウミコチョウ, 小野篤司 & 加藤昌一. (2009). ウミウシ. 誠文堂新光社.
- Sagaminopteron ornatum, Terrence Gosliner, Ángel Valdés and David Behrens. (2015). Nudibranch and Sea Slug Identification Indo-Pacific. 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, Sagaminopteron ornatum, is included in the book.
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Tag:
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.