mollusc

There are two types of mollusc that are actively venomous.

有两种随释放毒素软。

Many molluscs have tentacles.

很多软有触角。

Snails and octopuses are molluscs.

蜗牛和章鱼是软。

To avoid sampling bias, they restricted their analysis to one group of animals—the bivalve molluscs—that fossilise well.

为了防止取样偏颇，他们将分析对象限制在一类化石记录保存完备——双壳类软。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软不同是,双壳贝缺乏齿舌,具有唇瓣,可将食由鳃送到口部.