I have this pond at the back of my garden that I keep goldfish in, and recently I got some pond snails to put in it.
The two species of pond snail that I introduced to the pond are the Great pond snail, Lymnaea stagnalis, and the Great Ramshorn, Planorbarius corneus, both species have had babies and I also keep some of them in indoor tanks as pets to breed from.
However, today, I have found an unusaul pond snail on the edge of the pond (photo can be seen below). It doesn't really look like any of the babies I have had previously indoors or out, as it has these odd kind of white yellow stripes across its front whorl which aren't as clear in the photo as they seem to show better when the shell has dried a little. The other unusual thing is because the shell size looks too short for the great pond snail but of course has a point to it unlike the great ramshorn and infact it looks a bit like the shell of the Wandering snail, Lymnaea peregra. Then lastly, its tentacles are long and thin, like hairs, which is like the Planorbarius family and not the flat and broad like the Lymnaea family.
So at the moment I am a bit stumped and think its more likely to be the great pond snail but just wanted to check it wasn't like a cross breed of the two snails or something. Also the snail's flesh is more of a lighter grey colour like the Wandering snail and not the Great Pond and Ramshorns.
Thanks for any help
p.s I can take more photos if need be but I don't think they will get any better than this one
I can't profess to have much knowledge of freshwater snails, however the Conchological society has an online key that you can work through - see http://www.conchsoc.org/node/5299 . I would suggest it may be a Physa sp., but others may know better.
I must admit that I do not know what this pond snail is but I can tell you that it it is not a Great Pond Snail because they have more spirals.
yeah thats what I was thinking but was also thinking that it was a bit odd because there was no snails in the pond when I completely cleaned it out and all I added was Great pond snails and Great ramshorns but I did also add new plants so possibly the plants had a snail egg sack on them that it came from but thanks for the reply none the less
thanks for all the help duckinwales still trying to work it out but i think you could be right about it being Physa sp.
Thanks again for the link to the website . After using their key I believe what I have is a "tadpole physa", Physella gyrina, as the description fits and after looking at photos of it they are almost identical to mine so thanks again for the help it was very muchly appreciated
Gald I could help, and well done - you've encouraged me to take another look in my pond!