Elysia amakusana
Baba, 1955

Order: SACOGLOSSA
Superfamily: ELYSIOIDEA
Family: Elysiidae

DISTRIBUTION

Japan.

PHOTO

Shima Pref. Mie Japan, (Kii Peninsula, east coast). 25mm long, Jan. 2000. Depth: 3m. PHOTO: Yasuhiro Shirai.

I think this is Elysia amakusana Baba, 1955 . [Sagami Bay Supplement], which Baba introduced as a 'new name' for the animal figured on Plate 9, fig 27. in Baba, 1949 [Opisthobranchs of Sagami Bay] as Elysia japonica but which is not Eliot's Elysia japonica.

The painting shows brownish mottling on the parapodia and blue on the upper half of the rhinophores and a dark mark at the posterior tip of the body - very like the photo in 19 Feb 2000 message below. Also in the painting there are whitish papillae over parapodia.

See message below.
NOTE: This species was previously labelled Elysia sp. 6.

Reference:
• Baba, K. (1955) Opisthobranchia of Sagami Bay, Supplement. Iwanami Shoten, Tokyo. 59pp.

Authorship details
Rudman, W.B., 2000 (February 27) Elysia amakusana Baba, 1955. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/elysamak

Related messages


Elysia amakusana from South Korea

December 3, 2002
From: Dong Bum, Koh

Dear Bill,
Here is an elysiid which I think is Elysia amakusana. It is from Moon Islet, Che Ju Island, South Korea. June 2001, 5m depth. Photo: Dong Bum, Koh.

Best regards,
Dong Bum, Koh

drkoh@seasee.co.kr

Koh, D.B., 2002 (Dec 3) Elysia amakusana from South Korea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/8250

Dear Dong Bum,
I would agree with your identification.
Best wishes,
Bill Rudman

Elysia sp. 6. = Elysia amakusana

February 29, 2000
From: Bill Rudman

I am pretty sure that Elysia sp. 6 is Elysia amakusana Baba, 1949.
Bill Rudman.

Rudman, W.B., 2000 (Feb 29) Elysia sp. 6. = Elysia amakusana. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1981

Re: Elysia sp. 6.

February 19, 2000
From: Yasuhiro Shirai

Dear Bill,
Thank you for your reply about my messages.
I have attached another photo of Elysia sp. 6.. I think this is a color variation.

These data (water temp. ,place,depth,length, etc) are similar to previous.

Best regards.

Yasuhiro Shirai

yasuhiro@e-net.or.jp

Yasuhiro Shirai, 2000 (Feb 19) Re: Elysia sp. 6.. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1930

Dear Yasuhiro,
It certainly looks like a colour variation to me. The bright blue patch on the rhinophores are very distinctive.
Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Feb 19). Comment on Re: Elysia sp. 6. by Yasuhiro Shirai. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1930

Elysia from Japan

January 30, 2000
From: Yasuhiro Shirai


Dear Bill,

I think this one is an Elysia.
Could you please identify this animal for me?

Location: Shima Pref. Mie Japan (Kii Peninsula, east coast)
Length: 25mm
Water temperature: 13C
Date Jan. 2000
Depth: 3m
moved on seaweed

Best regards,
Yasuhiro Shirai

yasuhiro@e-net.or.jp

Shirai, Y., 2000 (Jan 30) Elysia from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1788

Dear Yasuhiro,
I have had a look through the papers I have on Japanese elysiids and can't find anything that seems to fit. The bright blue patches on the rhinophores would seem to be a very good character.

Perhaps this is another one that the sacoglossan experts can help us with.

Sorry I can't provide a name,
Bill Rudman.

Rudman, W.B., 2000 (Jan 30). Comment on Elysia from Japan by Yasuhiro Shirai. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1788