Alalcomenaeus
（重定向自Alalcomeneus）
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![](/Images/godic/202412/18/AlalcomenaeusCambricus-ROM-June11-104203.jpg")
Alalcomenaeus is one of the most widespread and longest surviving arthropod genera of the Early and Middle Cambrian. Known from over 300 specimens in the Burgess shale, and the Chengjiang, it bears great similarity to the opabiniids.