Thuridilla carlsoni Gosliner, 1995
- Location
- Sokodo(Sanmata), Hachijo Island, Tokyo, Japan
- Date
- 2019/05/04
- Length
- 12mm
- Depth
- 10.0m
- Water temperature
- 20.0℃
Description
Body length 9-15 mm. Background colour green, with abundant irregular green pigment spots covered by anastomosing opaque white blotches over much of the parapodia. The parapodial margin is pale cream to light yellow with a series of opaque white spots inside the marginal band. The head is opaque white mixed with green, the green extending onto the basal third of the rhinophores. The rest of the rhinophore is opaque white, with the apex burnt orange. The anterior margin of the foot and front of the head also bear opaque white pigment. The inside of each parapodium shows, from margin to centre: a cream marginal line, an opaque white band, a broader black band, and a green region with yellow-green longitudinal lines.Distribution
Hawaiian Islands, Enewetak and Kwajelin (Marshall Islands), Guam, Western Australia, Papua New Guinea, and Madagascar. Specimens recorded as Elysia gracilis in 1978 by Carlson and Hoff are referable to this species.Etymology
The specific epithet carlsoni honours Clay Carlson, a long-time student of Thuridilla based in Guam who, together with Patty Jo Hoff, first discovered this species.Remarks
This is one of the least derived members of the genus, retaining mostly plesiomorphic features. The only autapomorphic character is the broad radular teeth bearing 35-38 fine evenly-spaced denticles along each side of the cutting margin. Thuridilla carlsoni is most closely related morphologically to Thuridilla multimarginata, and is also similar to Thuridilla flavomaculata and Thuridilla kathae, but is distinguished from the latter two by green pigment reticulated with white (vs solid green) and by broader radular teeth.References
- Thuridilla carlsoni sp. nov., Gosliner T.M. (1995). The genus Thuridilla (Opisthobranchia: Elysiidae) from the tropical Indo-Pacific, with a revision of the phylogeny and systematics of the Elysiidae. Proceedings of the California Academy of Sciences. 49(1): 1-54.
- ツリディラ・カルルソニ, 殿塚孝昌. (2003). ウミウシガイドブック〈3〉. TBSブリタニカ.
A Kindle field guide by the site author
Kimoto N. (2026). Sea Slugs of Japan & the Indo-Pacific, 2nd Edition.
Kindle Edition
View on Amazon PR (Amazon Associates)Seasonality
Shooting Locations
Loading shooting locations...
Photos of Thuridilla carlsoni
Tag:
Same Genus Nudibranchs
Similar Colors Nudibranchs
Academic Database
Sea slug observation data is available in international marine biodiversity databases.