豪猪亚目（学名：Hystricomorpha）在历史上曾有过许多含义。广义上是指所有具有豪猪型颧弓－咬肌结构（Zygomasseteric system）的啮齿目动物（跳鼠类除外），包括豪猪下目（Hystricognathi）、栉趾鼠科（Ctenodactylidae）、鳞尾松鼠科（Anomaluridae）、跳兔科（Pedetidae）。分子及形态学研究表明，将鳞尾松鼠科与跳兔科列入其中是有争议的。根据Carleton与Musser的研究，这两科被分为鳞尾松鼠亚目（Anomaluromorpha）。

The term Hystricomorpha (from Latin hystrix "porcupine" and Greek μορφή, morphē "form") has had many definitions throughout its history. In the broadest sense, it refers to any rodent (except dipodoids) with a hystricomorphous zygomasseteric system. This includes the Hystricognathi, Ctenodactylidae, Anomaluridae, and Pedetidae. Molecular and morphological results suggest the inclusion of the Anomaluridae and Pedetidae in Hystricomorpha may be suspect. Based on Carleton & Musser 2005, these two families are treated here as representing a distinct suborder Anomaluromorpha.