Re: Mexichromis from Sagami Bay, Japan
August 11, 2001
From: Bernard Picton
Hi Bill,
Concerning Nishina's Mexichromis from Japan I was looking at Orr's book again, while going through my Hong Kong files. He has a picture identified as Chromodoris festiva (Angas, 1864) which clearly shows a broken yellow line around the margin. Given that a number of warm temperate species do occur both in SW Australia and Hong Kong/Japan I wonder if M. festiva really is present also in the NW Pacific.
Bernard
bernard.picton.um@nics.gov.uk
Picton, B.E., 2001 (Aug 11) Re: Mexichromis from Sagami Bay, Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5038Dear Bernard,
John Orr's photo certainly has similarities to both M. festiva and M. mariei. I certainly have no objections to a species from New South Wales also occurring in the NE Pacific. Interestingly I suspect the apparent disjunct distribution which seemed to exist between southeastern temperate Australia and Japan for a number of species, including Kaloplocamus acutus, Hypselodoris maritima, Stilger smaragdinus, Sagaminopteron ornata etc, is now being shown to represent a disjunct distribution of opisthobranch workers. As more collecting takes place in the tropical regions in between, the distribution gaps seem to be disappearing.
Cheers,
Bill Rudman
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