Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.
软体动物不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食物鳃送到口部.
Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.
软体动物不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食物鳃送到口部.
The mandibles are usually lost, the labrum is reduced to a narrow transverse sclerite, and the labium is a small flap ( though its palps retain quite large).
上颚消,上唇退化为一条窄横片,下唇退化为一小片(下唇须发达)。
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