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:
Oblique view of the same shell:
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:
Dried egg capsules that have a dried embryo inside:
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:
Inner side of the operculum:
Flood deposits include flood debris and shells of molluscs. Such assemblages of dead remnants of molluscs are called thanatocoenoses. Shells may com from any locality anywhere in the upper river drainage, but you can get shells of some species, that can not be obtained easily.
Flood debris from the Danube river in Slovakia:
It may seem, that there are only valves of a freshwater bivalve Corbicula fluminea.
But after a closer look there are many gastropod shells too. The following species of gastropods can be recognized on the photo:
- Esperiana esperi – one oblong shell with dots in the right center
- Esperiana daudebartii acicularis – one oblong shell on the top
- Theodoxus fluviatilis – a small black shell with white dots in the center
- Theodoxus danubialis – larger striped shells with a flat apertural plain
- Lithoglyphus naticoides – white globular shells without the apertural plain
There are also bivalves:
- Corbicula fluminea – brown rounded ribbed valves
- Dreissena polymorpha – two triangular valves on the top