叶菊石亚目（学名Phylloceratina）是一类生存于下三叠纪至上白垩纪的菊石目。它们一般都很粗壮及极度卷曲，中心细小，缝合线有很多碎屑装饰。所有其他侏罗纪及白垩纪的菊石目，包括菊石亚目、弛菊石亚目及勾菊石亚目都是衍生自叶菊石亚目。

The Phyllocertina comprise a suborder of ammonoid cephalopods, belonging to the Ammonitida, whose range extends from the Lower Triassic to the Upper Cretaceous. Shells of the Phylloceratina are generally smooth with small to large umbilici and complex sutures with leaf-like phylloid saddle endings and lobes with thorn-like projections.