But for example helicid snails (such as Roman snails and banded snails) do occasionally mate crossing species, because they have the same attractant pheromone. But nothing will come from it.
I have seen cross-species mating between T. pisana and O. lactea, but as Robert said, nothing came of it.
I have also witnessed courtship between O. lactea and H. aspersa, but I do not know if it led to actual mating. Eggs were laid but did not hatch (eggs could have been from a previous mating before I acquired the snail).
Post by Robert Nordsieck on Jun 4, 2011 22:33:23 GMT
There is a paper by Falkner on the matter. I have pictures of Helix lucorum and pomatia (by Arno), as well as Cepaea nemoralis and Helix pomatia by another photographer.
According to Falkner (Falkner, G. (1993): Lockspiel und Lockstoffdrüsen bei Hygromiiden und Heliciden (Gastropoda, Stylommatophora): Heldia 2 (1/2) (1993), 15 – 20.), the relatives of Helix (aka. Helicidae) and some other snail groups produce an olfactory attractant, like a pheromone, which apparently is not quite specific and attracts anything that widely resembles a snail. There also is a Cornu aspersum snail I was able to photograph which was hit by no less than 3 love darts at once (looks like St. Sebastian), of which one definitely was no Cornu dart but from a Cepaea (there were no other snails).
"These imperial snails will never get us" (Han Solo). "TaH pagh taHbe'!" (General Chang) "Once More Unto The Breach" (Henry V.)