On 2 Jun 1997, Mark Armitage wrote:
> Dear all,
> Being ignorant in the area of snails (first intermediate hosts for trematodes) I am stumped on two definitions: Hydrobiid and Amnicolid....any
> Mark Armitage
Amnicola and Hydrobia are genera of fresh water snails belonging to the
family Hydrobiidae. They are prosobranch (subclass) snails which are
characterized by true gills and opercula which are generally lacking in
pulmonate, or air- breathing, snails. I hope this helps.