I should be grateful to have an ID on this, if the images allow
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Thank you. Are there wasps that are parasitic on, or which otherwise attack snails?
Not directly so far as I am aware, although there are many flies associated with snails, either as parasitoids or saprophages, e.g. Sciomyzidae, Phoridae, and these flies are in turn attacked by parasitic wasps, such as Cryptinae ichneumonids, diapriids etc. There are also bees that nest in empty snail shells and they have their parasitoids too. If you rear parasitic Hymenoptera from a snail shell it is worth saving the insect, and also the snail shell which will give clues as to the biology of the wasp.
Thanks. I did pick up a Sciomyzidae, Tetanocera recently (Dipterists Forum). I have since been wondering if snails that have been subject to parasitism early in life could be identified by a shell colour that differs from the norm.
quite possibly, for some snails with translucent shells, the apparent shell colour is affected by the colour of the body contents which can be seen through the shell. If the parasite eats the body of the snail, then that may change its external appearance a little
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