Re: Lomanotus genei from west coast of Scotland

May 24, 2006
From: Jeff Goddard

Concerning message #10591:

Hi Bill,
I just noticed that the Lomanotus genei in Jim Anderson's upper photo [message #10591] is carrying a parasitic copepod (two small, white egg sacs can be seen protruding the dorsum of the slug). Thompson & Brown (1984) note that Cornet & Marche-Marchad (1951) reported that L. genei from Brittany (France) are sometimes infected with Spanchnotrophus insolens.

  • Cornet, R. and Marche-Marchad, I. (1951) Inventaire de la faune marine de Roscoff, Mollusques. Travaux Station Biologique Roscoff, Suppl. 5:1-80.
  • Thompson, T.E. & Brown, G.H. (1984) Biology of Opisthobranch Molluscs Vol II. Ray Society, London.

Best wishes,
Jeff

goddard@lifesci.ucsb.edu

Goddard, J.H.R., 2006 (May 24) Re: Lomanotus genei from west coast of Scotland. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16689

Good find Jeff,

In the slightly larger version of Jim's photo there seem to be two pairs of tell-tale copepod egg masses. The one on the right is much clearer and as you suggest there seems to be an opaque white mass beneath the skin of the nudibranch indicating the rpesence of a parasitic copepod rather than the ubiquitous free-living ones often found scurrying over nudibranchs [see top photo on Symbiosis Fact Sheet ]

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (May 24). Comment on Re: Lomanotus genei from west coast of Scotland by Jeff Goddard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16689

Factsheet

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