腹足类的一个很大的目，包含单壳软体动物，有一个梳状鳃。
Large order of gastropods comprising univalve mollusks that have a single gill resembling a comb.
肉食性腹足类减少了草食性软体动物和固着无脊椎动物的数量；
Predaceous gastropods reduced the abundance of herbivorous molluscs and sessile invertebrates.
湖泊生物种群少且生物量低，缺失蓝藻和腹足类、瓣鳃类、甲壳类动物等为其区别于一般中、碱性湖泊最显著的特点。
Few species, low biomass and lack of blue green algae, Gastropoda, Lamellibranchia and Crustacea are most notable characteristics distinguished from general neutral and alkaline lakes.
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