Glossodoris rufomarginata (Bergh, 1890)
- Location
- Makiminato, Okinawa Island (Chatan and Southern area), Okinawa, Japan
- Date
- 2015/04/19
- Length
- 30mm
- Depth
- 5.0m
- Water temperature
- 23.0℃
Description
A medium-sized chromodorid, body length about 6 cm and up to 1.7 cm wide. In life the back is brown, mottled with darker patches; the mantle border is encircled by a narrow reddish-brown band edged in white on both sides; the flanks and upper foot are a paler brown; the foot border is white. The rhinophores and gill leaves are brownish-grey with strikingly contrasting white rachides. The rhinophores carry about 35 lamellae on each side; the gill consists of 8 leaves on each side, the rear ends curling inwards in the manner typical of the genus.Distribution
Type locality: Noordwachter reef off Amboina (Ambon, Indonesia). Widely distributed across the rocky reef habitats of the Indo-West Pacific.Etymology
The specific epithet rufomarginata is a Latin compound of rufus ("red") and marginatus ("bordered"), meaning "red-bordered" — a clear reference to the narrow reddish-brown band that encircles the mantle.Remarks
Originally placed in Casella; Casella was later treated as essentially synonymous with Glossodoris, so the species is now placed in Glossodoris. Externally separable from Glossodoris atromarginata, which has a deep blue mantle border.References
- Casella rufomarginata Bgh. n. sp., Bergh R. (1890). Malacologische Untersuchungen. In: Semper, C. Reisen im Archipel der Philippinen. Wissenschaftliche Resultate. Theil II, Band 2, Lieferung 5 (Heft XVII). Wiesbaden: C. W. Kreidel's Verlag, pp. 815-994, Taf. LXXXV-XCIV.
- Glossodoris rufomarginata (Bergh, 1880), Rudman W.B. (1986). The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: the genus Glossodoris Ehrenberg (= Casella, H. & A. Adams). Zoological Journal of the Linnean Society. 86(2): 101-184.
- グロッソドリス・ルフォマルギナタ, 殿塚孝昌. (2003). ウミウシガイドブック〈3〉. TBSブリタニカ.
- Glossodoris rufomarginata, 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 Glossodoris rufomarginata
Tag:
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.