February 1, 2007
From: Patricia Peels
Concerning message #5416:
While browsing through your website I came across your request for more pictures of aglajids from the Mediterranean. I'm attaching one which was taken a few years ago and identified as "Aglaja tricolorata Renier, 1807". Is this correct?
Locality: Sliema, 32 m, Malta, Mediterranean, 3 June 2004, sandy bottom. Length: 4 cm. Photographer: Patricia Peels.
Thank you for your help!
firstname.lastname@example.orgPeels, P., 2007 (Feb 1) Aglaja tricolorata from Malta. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19319
Thanks very much for this photo of Aglaja tricolorata. When I revised this family in the 1970s it was very important to sort out the Mediterranean species, as the genus names Doridium and Aglaja were based on animals from there. Unfortunately the literature was quite confusing and it was not until quite recently that good descriptions have appeared. I must say however that the name of A. tricolorata [tricolorata (= three colours)] does make me wonder if we have misidentified this species, which is essentially dark brown and white.
The drawing alongside is a good example of the confusion. It is an illustration of Aglaja tricolorata from Vayssiere (1880 - as Doridium membranaceum) and was copied by Pilsbry (1896) and Pruvot-Fol (1954). The distinctive tentacular corners on the anterior parapodia are absent and the thin posterior flagellum is shown to originate from the top of the posterior shield when it in fact extends out from the ventral fold. The small dark specks are also misleading, as the animal is a dark translucent brown with opalescent white spots scattered all over the dorsal surface and the sides. On the ventral surface the background colour is much more translucent and the white spots larger. Some reports say there are blue and orange lines along the parapodial edge but that seems to be a confusion with Philinopsis depicta.
Pilsbry, H. A. (1896) Manual of Conchology; Structural and Systematic. With illustrations of the species. Vol. XVI.' (Eds G. W. Tryon and G. W. Tryon.) p. 262. (Academy of Natural Sciences: Philadelphia.)
Pruvot-Fol, A. (1954) Mollusques Opisthobranches. Faune de France, Paris 58: 1-460, Pl.1.
Rudman, W.B. (1974) A comparison of Chelidonura, Navanax and Aglaja with other genera of the Aglajidae (Opisthobranchia, Gastropoda). Zoological Journal of the Linnean Society, 54(3): 185-212.
Vayssière, A. (1880) Recherches anatomiques sur les mollusques de la famille des Bullides. Annales des Sciences Naturelles, (ser 6) 6(4): 1-123.
Re: Aglaja tricolorata 'colour variation'
From: Dominique Horst, August 17, 2009
Re: Aglaja tricolorata 'feeding'
From: Dominique Horst, September 5, 2008
A damaged Aglaja tricolorata
From: Dominique Horst, September 4, 2008
Aglaja tricolorata 'trailing'
From: Dominique Horst, July 17, 2008
Re: Aglaja tricolorata from the French mediterranean
From: Dominique Horst, July 7, 2008
Aglaja tricolorata from the French mediterranean
From: Dominique Horst, July 4, 2008