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Tricky Trichia

Observed: 16th December 2009 By: mick
London Natural History Society
mick’s reputation in Invertebratesmick’s reputation in Invertebrates
2009 1217 094729
2009 1216 163533
Trichia
Description:

Parkland snails. Are these all likely to be Trichia striolata Strawberry Snail? They don't have much of a shoulder as described in Cameron's key. The smallest one has a few bristles. I think the other one is Cochlicopa lubrica Slippery Moss Snail.

Identifications
Species interactions

No interactions present.

Species with which Trochulus (Trochulus) striolatus interacts

Comments

dshubble's picture

Request for more snail info

Do you have measurements of diameter and photos of the undersides (to check the umbilicus)? Also, a side-on photo would be useful to get the profile - the round one in the right-hand photo looks somewhat different and slightly flattened.

mick's picture

Trichia

Please see new photo and comment

mick's picture

Trichia

Thank you dshubble, all the photos are taken on 5mm squared paper, so the biggest is around 12mm and the smallest about 6mm. I have posted a 3/4 shot of the big one, but I couldn't detect a shoulder on any of them. I'll see if I can work out how to link the new photo into this thread. A bit of a challenge! M.

dshubble's picture

snails

Thanks for the update - if above 11mm across, then it can't be Trochulus (new name for Trichia) hispidus or sericeus, which leaves your initial i.d. still there as a good possibility :) Once a view of the underside is posted, I should (I hope) be able to be a bit more definite.