Photos of 3 types of Ampullariidae: pomecea bridgesii/diffusa (male, ~6mos, light bodied wild), pomecea canaliculata (gender?, ~4mos, dark bodied) and marisa cornuarietis (female, ~8mos, both gold and striped).
Note how the spire whorls are stacked neatly like a cake.
Note how the seams between the cake layers are smoothed over
Note how the "cake" has sunk in on itself
Note the cake's seams are more obvious and grooved.
This is from another cana I first used for the images then noticed his spire was weird, so I used another for the above image.
Further spire comparison between the bridgesii/diffusa (left) and canaliculata (right)
Am going to stickyfy this, hope you don't mind; there aren't many stickies in this part of the board. Some of these photos really exemplify the spire differences and would be good as reference in addition to the species pages of the site.
EDIT: how certain are you of the ID on the Viv? The sharp angles look an awful lot like the offspring from the Cipangopaludina japonica I used to keep.
"That's not a snail...it's a water goat!"--In loving memory of Eatith - My Research
The baby viv on the gold marisa is from the three I got from a plant/pond place here, locally.
Their offspring is quite different from the offspring of the vivs I got from Rainbow Snails a long time ago. For one, the juvies are brown and sharper, especially in a raised rim in the middle of each whorl.
I'll work on getting images of those next. None of the parents are alive, however. I do have photos of them all, though.
If anyone has any of the other species, I'd love to add in photos of those, taken from the same angle as the ones I have. That way we can compare then easily. Robert, some of your flapples, please?
I would be very cautions when Identifying P. canaliculata. The shape of the spire and depth of the channel is nearly identical to the P. Insularum. I would suggest adding photos of egg clutches sizes, color, and shapes. This is the best way to distinguish between a P. canaliculata and a P. insularum. Even then it is still difficult without genetic testing.