Variation in Thuridilla hopei
February 20, 2000
From: Erwin Koehler
Hi Bill,
here are some more colour variants of Thuridilla hopei (Vérany, 1853) from the Mediterranean.
My impression is, that the very dark blue form with no yellow spots, or very few, and dark orange/red lines at the edge of the parapodia live rather deep. For example the upper right specimen in Miquel Pontes message was at 15 m, my EK061905 was taken at 57 m depth in Croatia, Balun Is., July 1996 - length 2,5 cm.
In shallow waters the variant like EK075804 is very common - this one was taken in Italy, Elba Is., Capoliveri, divesite "Yellow Wall" size 2 cm, depth 11m, July 07, 1997. It would be great to hear, if other divers and/or scientists made the same or other observations...
The greenish variant (EK071601) is from Malta, divesite "Blue Grotto", 12 mm, depth 6 m, May 08, 1997 - the only sight of this variant.
Erwin.
Medslugs.Koehler@t-online.de
Koehler, E., 2000 (Feb 20) Variation in Thuridilla hopei. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1934Dear Erwin,
Thanks for the observations. It will be interesting to hear what others have to say.
Best wishes,
Bill Rudman.
Related messages
-
Re: Thuridilla hopei under predation attack
From: Dominique Horst, June 12, 2009 -
Thuridilla hopei from the French Mediterranean
From: Dominique Horst, April 9, 2008 -
Thuridilla hopei from Israel
From: Dani Barchana, July 2, 2007 -
Thuridilla hopei from Turkey
From: Kerim Sabuncuoglu, September 4, 2006 -
Re: Variation in Thuridilla hopei
From: Vasilis Athanasopoulos, November 22, 2005 -
Thuridilla hopei: nice mating behaviour
From: Marina Poddubetskaia Ossokine, September 14, 2005 -
Thuridilla hopei - mating observations
From: Nils Anthes, November 22, 2002 -
Re: Mating Thuridilla hopei
From: Kathe R. Jensen, August 1, 2002 -
Thuridilla hopei from French Mediterranean
From: Marina Poddubetskaia, July 30, 2002 -
Re: Mating Thuridilla hopei from Croatia
From: Andreas Ahrens, July 30, 2002 -
Mating Thuridilla hopei from Croatia
From: Andreas Ahrens, July 21, 2002 -
Thuridilla hopei? from Croatia
From: Andreas Ahrens, June 26, 2002 -
Thuridilla hopei from French Mediterranean
From: Marina Poddubetskaia, June 25, 2002 -
Any information on Thuridilla hopei?
From: Miquel Pontes, January 31, 2000