Marisa
|
Marisa
|
|
 |
|
Overview Afropomus Asolene Felipponea Lanistes Marisa Pila Pomacea Saulea |
The new world genus Marisa (Gray, 1824) contains 2 known species.
Due to their a discoidal shell (the spine isn't elevated above the body whorl
and thus making the shell almost flat), these snails are not always recognized
as being an apple snails. However, from an based on the anatomy, these snails
definately belong to the Ampullariidae snails are are probably closely related
to the Asolene genus.
In the aquarium trade these snail are often know as the 'giant ramhorn snails'.
Type species is Marisa cornuarietis (Gray, 1824, originally described
as Marisa intermedia).
The genus name Ceratodes (Guilding) is a junior synonym for Marisa.
Species
|
 Marisa cornuarietis. |
Characteristics of the genus Marisa:
 |
Shell: | surface: | smooth, with growth lines in adult snails |
| shape: | discoidal (all whorls in one plane, no eleveated spine) | ||
| direction: | right (dextral) | ||
| whorls: | round | ||
| shell-opening (aperture): | kidney-shape | ||
| umbilicus: | wide | ||
| colour: | yellow to dark brown with 0 to 6 dark spiral bands | ||
| Operculum: | corneous | ||
| Body: | head (cephalic) tentacles: | long | |
| labial tentacles: | long | ||
| breathing siphon: | short | ||
| colour: | gray-yellow with or without (yellow variety) dark spots | ||
| Eggs: | aquatic |
 |
 |
  Except where otherwise noted, this page is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License . http://www.applesnail.net |
|