The book Sea
Slugs of Western Australia on page 116,
frame 142, identifies a nudibranch that appears similar
to this one as Hypselodoris maculosa
(synonym Hypselodoris decorata).
Another reference is made to H. maculosa
in the new Helmut
Debelius book on nudibranchs and sea snails.
On the web, there is a photo of H. maculosa
Miller's Slug Site, under "Philippine
nudibranchs". It has a similar color scheme, with
the exception of the solid orange band with an S-shaped
inner border on its notum.
Despite these various sources I was undecided whether
this is the same species until I received an e-mail from
Erwin Koehler, proprieter of the Mediterranean Slug
Site, in late January '99. Mr. Koehler faced
a similar dilemma identifying a photo of a nudibranch
identical to the one shown above, and submitted a picture
of his Philippine specimen to malacologist
Dr. Bill Rudman at the highly regarded Australian
Museum Online's Sea Slug Forum. Dr. Rudman
confirmed on this
page from the forum, supported with photos,
that Mr. Koehler's specimen is H. maculosa, and that
various specimens of this species vary in color.
Nudibranchs of the same species but different localities
often show minor variations in color scheme (sometimes
due to different diets). Nudibranchs may also change
colors with maturity. The shape of a nudibranch species
remains unchanged regardless of locality.
Identification: Hypselodoris maculosa
the thumbnail page