Bellamya unilor is a species freshwater snail in the family Viviparidae fom Africa.
I am happy, that the reader of my blog identified my snail properly. Thank you.
Apertural view of the shell. The width of the shell is 25 mm, the height of the shell is 35 mm.
Oblique view of a spire:
Oblique umbilical view of a shell:
Apical view focused on the apex shows, that this shell has 6 and 1/8 whorls:
Lateral view:
A snail is protruding from its shell:
Left side view. The shell of this specimen is damaged and I do not know what caused this damage, but I can easily recognize snails from each other.
Bellamya unicolor snail defecating:
Frontal view of a snail shows tentacles, snout and some folds of the mantle above the head:
gastropods 
Based on the dissection all of these photos in this post shows a male specimen of Filopaludina sp., but the snail was too decayed to provide detailed informations.
Bellamya unicolor.
Thank you very much for species identification. I updated the blog post.