View Full Version : Need one more ID for snail with red foot
GerritM
12/14/2011, 02:40 PM
Hi (Don)!
Who knows the name of this snail?
Collected in the south of Bali.
Shell size 22 mm
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pagojoe
12/14/2011, 05:23 PM
Hi Gerritt,
The ribs aren't as distinct as some examples, but this should be a variant of Peristernia ustulata. There aren't many species of Peristernia with the purple/black tip to the siphonal canal, and only three that I can think of from the Indo-Pacific. One of those is more elongated with stronger exterior sculpture, and generally more ornate. Another looks similar, but is slightly more angular, and has more purple in the aperture and an iridescent periostracum. Pretty much every other Peristernia from the Indo-Pacific that is white or whitish with the dark anterior tip is considered to be P. ustulata. I have three very distinct forms, one solid white except for the purple tip, one with a couple of broken brown bands, and one that is brown banded from top to bottom. I puzzled over them for months until a fasciolariid expert confirmed that they were all the same species. I collected them all within about 50 meters of each other, although on different days.
You certainly find lots of interesting snails! I enjoy seeing the pics.
Cheers,
Don
GerritM
12/15/2011, 01:01 PM
Hi Don!
Cool, you´re right with Peristernia ustulata. Thanks a lot.
Do you know, what specially this species eats?
Is it right, that Peristernia feed mainly polychaetes, sipuncula worms, gastropods, barnacles and tunicates, or do they also eat algae and detritus?
You certainly find lots of interesting snails! I enjoy seeing the pics.
Thank you, I am pleased that you like my pictures.
best wishes
Gerrit
pagojoe
12/15/2011, 11:54 PM
Yes, they are all either predators or scavengers, or both. They really aren't equipped to eat algae, and any detritus they might consume is probably inadvertent. The Peristernia and Latirus species usually kill their own prey, mostly other molluscs.
Cheers,
Don
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