Lithoglyphus naticoides is a freshwater snail. Its distribution is Pontic and Danubian.
Shells from my collection comes from Danube river in Slovakia. The apertural view of the shell looks like this. The width of the shell is 8.5 mm and the height of the shell is 8.5 mm:
It lives on the muddy bottom, and it can not lay egg capsules on stones. Therefore is lay egg capsules on shells of other Lithoglyphus naticoides snails. Remains of egg capsules on the shell of Lithoglyphus naticoides:
The width of the following shell is 7.0 mm and the height of the shell is 7.0 mm.
I wanted to see a color photo of an operculum of Lithoglyphus naticoides, but I found color drawings on the internet only and black-and-white photo of an operculum in books. So I made few photos of an operculum of Lithoglyphus naticoides.
The width of the operculum is 3.0 mm and the height of the operculum is 4.0 mm. It is the operculum from the shell above. Outer side of the operculum: