Any of various insect larvae that live and feed within a leaf, including caterpillars, sawfly larvae, beetle and weevil grubs, and dipteran maggots.

许多在叶中生活并取食幼统称，包括毛、叶蜂幼、和象以及双翅类。

This is the first reliable trematothoracin sawfly discovered in China and in the Jurassic Period.

首次在我国发现可靠陷胸茎蜂化石，也该亚科在侏罗纪首次报道。