Hypselodoris bullocki? from NW Australia

July 24, 2000
From: Matthew Archer

Dear Bill

I found several of these nudibranchs on a recent diving trip to the Ningaloo Reef. They were found between 2/7/00 and 14/7/00 on coral bombies, in about 15-20 meters depth. The water temp was 23 degree. The nudibranchs were only quite small- usually between 3-4 cm. I've been looking through the species list but can't really make a definate ID. Could it be a variant of Hypselodoris bullocki?

Sorry, I don't have a camera, so this reconstructed drawing was the best I could do. I hope you get the general idea (pale/white with a dark blue margin and dark red gills/rhinopores- there were no other markings).

Yours Sincerely,

Matthew Archer


Archer, M., 2000 (Jul 24) Hypselodoris bullocki? from NW Australia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2757

Dear Matthew,
Congratulations on the reconstruction. I would suspect it is part of the Hypselodoris bullocki complex. I am hesitant to say they are all varieties of one species, but must admit to difficulties in finding any anatomical differences. I have not actually seen a 'form' with a blue border, but I do illustrate one from Darwin (Photo D. on the Hypselodoris bullocki page) which has a bluish-purple border.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Jul 24). Comment on Hypselodoris bullocki? from NW Australia by Matthew Archer. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2757

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