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

许多在中活并取食昆幼统称，包括、蜂幼、甲和象甲以及双翅类昆蛆。

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

这是首次在我国发现可靠陷胸茎蜂化石，也是该亚科在侏罗纪首次报道。