1: foot. 2: anterior cephalic lobe. 3:posterior cephalic lobes held erect. 4: pallial exhalant siphon; taper fits adapical angle of aperture. 5: glans of penis? 6: rectum and anus OR female opening/vagina?
I have used Fretter and Graham as a guide but features on a live specimen differ from those on their dissected dead specimens. [ F & G, 1954. Observations on the opisthobranch mollusc Acteon tornatilis (L.) J. Mar. Biol. Ass. 33(3)].
https://plymsea.ac.uk/id/eprint/1621/1/Observations_on_the_opisthobranch_mollusc_Acteon_tornatilis_(L.).pdf
Sorry but I do not know. My guess is that serial microscope sections of these structures will help with identification.
Thanks for your attention to it Natalie. Part of the problem is that killing and preservation alter the appearance of what is seen when live. The image in F&G is of dead material.
Yes but your pix are so good that we now know what they look like in life - if you preserve one or two you might be able to match them to the drawings in F&G?? Where are you collecting them, out of curiosity?!
Nathalie if you look at the captions you will see photos taken by me are of specimens leg. Paul Brazier subllttorally in Llŷn, N. Wales in 2015 during a week there with the Conch Soc.. I never found live ones on the shore or diving in the 1970s in Orkney. I regret that due to health/age even shore work is beyond me. I am using my time now to read literature and compile illustrated accounts with the many images I have accrued during my active years; rather like the pattern of Darwin's life, though I hasten to add that in no way am I likening myself to his level of competence.
Nathalie, I should have added that the whole account is now at https://flic.kr/s/aHBqjBK19B with 'tentative' after the doubtful features in the captions. I am part way through uploading it also on Senckenberg (not yet visible) to join my accounts at https://marinvert.senckenberg.science/ These can be amended if I get answers to my queries but I am delaying to last a PDF for Researchgate as it won't be easy to update once put online.
oooh very nice, camera equipment has improved since my day!! I have just uploaded two more Acteon papers that seems to be missing here on ResearchGate that might help you! Where did you collect yours? I did my PhD in Swansea, and had specimens from Rhossili and Oxwich.
Nathalie I think you may have missed that my previous response was in two messages as the first answered your location query.
- Badges
- Science method
- Similar topics
- Biological Science
- Ecology