Spurilla chromosoma not S. neapolitana from Japan
March 19, 2000
From: Y. Hirano
Dear Bill,
I had a look at the recent messages about an aeolid nudibranch from Japan which could be Spurilla neapolitana.
I think I have often collected specimens of this species and I am quite sure it is Aeolidiella chromosoma (Cockerell & Eliot, 1905). I dissected the specimens and found good morphological characters with which I can identify them as the species.
I reported this at the annual conference of the Japanese malacological Society held a year ago, as one species of species list newly found from Japan. I do not know whether the species was introduced to Japan from the east Pacific coast, or whether it was originally native to Japan. Anyway there is not yet any information on the species on the illustrated books or papers so far published in Japan.
The body colour is quite variable depending on specimens from vermilion, dull orange to thin cream yellow. They are usually found from underside of large boulders in the intertidal zone. It does not seem to be uncommon in Japan. I have attached a photo for the forum.
Data: October 28, 1996. Intertidal of Kominato coast, Boso Peninsula, Japan. Body length 25 mm. Rhinophores lamellate. PHOTO: Yoshi J. Hirano.
Very best wishes,
Yoshi
hiranoyj@earth2.s.chiba-u.ac.jp
Hirano, Y., 2000 (Mar 19) Spurilla chromosoma not S. neapolitana from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2121Dear Yoshi,
Thank you very much for the photo and the information. I have had a look at the published descriptions of S. neapolitana and S. chromosoma and can't see too many differences other than Ernst Marcus (1961) saying that the anterior ceratal cluster on each side in S. chromosoma consisted of about 4 rows as compared with the single rowed arch in S. neapolitana. It would be interesting to have some input from anyone familiar with S. chromosoma in its 'home territory'.
Best wishes,
Bill Rudman.
Related messages
-
Another Spurilla chromosoma from Sydney
From: Donald Miles, March 16, 2006 -
Another Spurilla chromosoma from Sydney
From: Maggie Mitchell, March 16, 2006 -
Re: Spurilla chromosoma? from Bare Island, Sydney
From: Jason Hoare, January 31, 2006 -
Re: Spurilla chromosoma? from Bare Island, Sydney
From: Jason Hoare, January 28, 2006 -
Re: Spurilla chromosoma? from Bare Island, Sydney
From: Jason Hoare, January 27, 2006 -
Re: Spurilla chromosoma? from Bare Island, Sydney
From: Denis Riek, January 27, 2006 -
Spurilla chromosoma? from Bare Island, Sydney
From: Jason Hoare, January 26, 2006 -
Spurilla chromosoma from Ecuador
From: Soledad Luna, August 10, 2003 -
Re Mystery aeolid from California
From: Orso Angulo, October 22, 2002 -
Mystery aeolid from California
From: Sean Kearney, October 16, 2002 -
Re: Spurilla neapolitana or S. chromosoma
From: Jun Imamoto, April 18, 2002 -
Spurilla neapolitana or S. chromosoma
From: Jun Imamoto, April 17, 2002 -
Egg ribbon of S. chromosoma ? from Japan.
From: Jun Imamoto, April 17, 2002 -
Spurilla chromosoma from Japan
From: Bill Rudman, September 23, 2001 -
Spurilla chromosoma from Hong Kong
From: Leslie Chan, July 22, 2001 -
Spurilla chromosoma from California
From: Bruce Wight, February 7, 2001 -
Spurilla chromosoma egg mass
From: Bruce Wight, February 7, 2001 -
Re: Re: Spurilla neapolitana? from Japan
From: Satoru Hori, March 17, 2000 -
Re: Spurilla neapolitana? from Japan
From: Satoru Hori, March 16, 2000 -
Spurilla? from Japan
From: Satoru Hori, March 14, 2000