Re: Cadlina? Aldisa? or . Conualevia alba?

August 4, 2007
From: Brian K. Penney

Concerning message #20176:

Hi Dave
I agree that it is often impossible to positively identify a species from a photograph alone. However, I thought I should point out that while I was in British Columbia, I collected a large number of individuals of Cadlina luteomarginata that had a mantle gland pattern and tubercle shape (smaller and almost coming to a low point, rather than broad and rounded) similar to that in Jackie and Glenn's photos. I checked their species identity using other characters (radula, etc.) so I am sure this was variability in one species rather than misidentification. I have sent some specimens on to Rebecca Johnson for her work on the genus, but I am not sure what she has found.

Locality: Bamfield, 0-15m, British Columbia, Canada, Northeast Pacific, 1997-2000, cobble-rocky substrate.

Also, at least several members of the genus Cadlina (C. flavomaculata, C. laevis, C. luteomarginata ) have spicules. See:

  • Alder, J., and A. Hancock. 1845-1855. A monograph of the British nudibranchiate Mollusca. The Ray Society, London.
  • MacFarland, F. M. 1966. Studies of Opisthobranch Mollusks of the Pacific Coast of North America. California Academy of Sciences, San Francisco.
  • Penney, B. K. 2006. Morphology and biological roles of spicule networks in Cadlina luteomarginata (Nudibranchia, Doridina). Invertebrate Biology 125:222-232.

Best wishes
 Brian

bpenney@anselm.edu

Penney, B.K., 2007 (Aug 4) Re: Cadlina? Aldisa? or . Conualevia alba?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20373

Hi Brian,
Thanks so much for this excellent reply. We needed advice from someone who had looked at their internal anatomy.. Good show.

I must admit this is certainly a different color variation for this species then I have ever come across. Good information for a next edition of Eastern Pacific Nudibranchs.

Thanks for clearing up this ID,
Dave Behrens

Behrens, D.W., 2007 (Aug 4). Comment on Re: Cadlina? Aldisa? or . Conualevia alba? by Brian K. Penney. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20373

Factsheet

Cadlina luteomarginata

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