(van Hasselt, 1824)
Upper: Solitary Islands, northern New South Wales, Australia, April 1987. Photo: Bill Rudman. Lower: Florida Group, Solomon Islands, November, 1999. Photo: M.J. Adams.
Note added 4 July 2007: The name is changed today from C. sinuata to C. sinuatum - see message #20101.
Until now I have, like Baba & Hamatani (1974), considered all the various coloured forms of 'Miamira' to be part of one variable species, Ceratosoma sinuatum [see message #19853] but after reviewing the available names [message #19854] I am also recognising C. flavicostatum and a group of animals which may well be Ceratosoma magnificum.
In C. sinuatum the background colour ranges from bright green to dull purplish brown and the whole body is covered with low rounded yellow tubercles. Both the gills and the rhinophores are translucent greenish or brownish - depending on the background colour - and have scattered white spots. The anterior end of the mantle is trilobed with the central lobe being much longer than the other two.
From the available information it would seem there are at least two species in this group, one with rounded tubercles and white spots on the gills and rhinophores, which is C. sinuatum, and one with a ridged pattern and distinctive white lines on the gills which can be identified as Baba's Ceratosoma flavicostatum. As mentioned above, C. magnificum may be a thrid species. [Earlier names for C. sinuatum include Doris sinuata van Hasselt, 1824 and Miamira nobilis Bergh, 1875].
Baba, K. (1940) Miamira flavicostata n.sp., a nudibranchiate mollusc from Amakusa, Japan. Zoological Magazine, Japan 52(6), 239-240.
Baba, K & Hamatani, I. (1974) On the synonymy of Miamira sinuata (van Hasselt, 1824) from Japan (Nudibranchia: Dorididae: Miamirinae). Venus, The Japanese Journal of Malacology 33 (2, August), 81-84.
Eliot, C.N.E. (1910) Nudibranchs collected by Mr. Stanley Gardiner from the Indian Ocean in H.M.S. Sealark. Reports of the Percy Salden Trust Expedition to the Indian Ocean in 1905, under the leadership of Mr. J. Stanley Gardiner, M.A. Transactions of the Linnean Society, Zoology, series 2, 13(2), 411-439, Pl. 25.
Valdes, A. & Gosliner, T. (1999) Reassessment of the systematic status of Miamira Bergh, 1875 and Orodoris Bergh, 1875 (Nudibranchia; Chromodorididae) in light of phylogenetic analysis. Journal of Molluscan Studies, 65:33-45.
Rudman, W.B., 2007 (April 30) Ceratosoma sinuatum (van Hasselt, 1824). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/cerasinu
Another misleading aquarium sale
From: Kevin Bott, November 25, 2009
Ceratosoma sinuatum feeding?
From: Mandi Woods, November 16, 2009
Ceratosoma sinuata from Reunion Is.
From: Sully Bachel, February 5, 2009
Ceratosoma sinuatum from East Timor
From: Brian Francisco, January 8, 2009
Ceratosoma sinuatum from the Philippines
From: Carlos Munda, April 7, 2008
Name changes in Ceratosoma
From: Bill Rudman, July 5, 2007
Ceratosoma sinuatum from southern Queensland, Australia
From: Gary Cobb, July 5, 2007
Ceratosoma sinuata from Komodo area
From: Marli Wakeling, June 1, 2007
Re: Ceratosoma sinuata from Clovelly, Sydney
From: Salvador C Tan, May 1, 2007
Ceratosoma sinuata from Sulawesi
From: Mary Jane Adams , December 21, 2002
Ceratosoma sinuata from Hawaii
From: Andy Woerner, May 27, 2001
Avoidance behavior in Ceratosoma sinuata
From: Mary Jane Adams, January 27, 2001
Ceratosoma sinuata from Clovelly, Sydney
From: Donata P. & Akos L., October 24, 2000
Re: Ceratosoma sinuata from the Solomon Ids
From: Mary Jane Adams, October 24, 2000
Another Ceratosoma sinuata from Solomons
From: Buce Potter, October 24, 2000
Three versions of Ceratosoma sinuata
From: Scott Johnson, October 23, 2000
Ceratosoma sinuata from the Solomon Ids
From: Bruce Potter, October 19, 2000
Ceratosoma sinuata? from Thailand
From: Narongpon Sittithaweepat, May 11, 2000
Ceratosoma sinuata from Okinawa, Japan
From: Kazuko Matsuda, February 13, 2000
Two juveniles of 'Miamira-group' from Okinawa
From: Kazuko Matsuda, February 2, 2000
Re: Ceratosoma (=Miamira) sinuata from Sydney
From: Erik Schloegl, October 23, 1999
Ceratosoma (=Miamira) sinuata from Maldives
From: E. Koehler, October 19, 1999
Ceratosoma sinuata Fact Sheet
From: Bill Rudman, October 18, 1999