Pila
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Pila
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Overview Afropomus Asolene Felipponea Lanistes Marisa Pila Pomacea Saulea |
The old world (Africa and Asia) genus Pila contains around 30 species.
The type species is Pila ampullacea
(Linné, 1758).
The status of some at least 2 Pila members is still unclear and it remains
to be seen wether or not these snails could be classified in a seperate genus:
Turbinicola (Annandale & Prashad, 1921) or that it's more justified
to create a sub-genus Pila (Turbinicola).
The type species is Turbinicola saxea (Annandale & Prashad, 1929).
Older Pila snails have a calcified inside of the operculum (shell door).
This is characteristic for the snails of the Pila genus and hasn't been
described by the other genera of the Ampullariidae family.
The eggs are white, calcified and deposited above the water surcae on vegetation,
rocks, or other objects. No coloured eggs are known in this genus, which makes
the a good exclusion criteria, once the eggs have any colour.
Species
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 Pila ampullacea. |
Subgenus Turbinicola
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Characteristics of the genus Pila:
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Shell: | surface: | smooth to rough (growth lines) |
| shape: | egg-shaped, ovoid to globose | ||
| direction: | right (dextral) | ||
| whorls: | round | ||
| shell-opening (aperture): | oval to egg-shaped | ||
| umbilicus: | wide, narrow to closed | ||
| colour: | yellow, dark brown to almost black, with or without spiral bands | ||
| Operculum: | corneous outside | calcified inside | |
| Body: | head (cephalic) tentacles: | long | |
| labial tentacles: | long | ||
| breathing siphon: | medium | ||
| colour: | grey-yellow to grey, with dark spots | ||
| Eggs: | above the waterline |
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