Periaulax is an extinct genus of gastropods in the family Trochidae.
Species Species in the genus Periaulax include: Periaulax rimosusKollmann H. A. & Odin G. S. (2001) "Chapter D2 Gastropods from the Upper Cretaceous geological site at Tercis les Bains (SW France)".Developments in Palaeontology and Stratigraphy 19: 437-451. . Periaulax tsheganica Amitrov, 2010 - It existed in what is now Kazakhstan during the Eocene period.Amitrov O. (2010). "Gastropods of rare families from the Tshegan Formation of Kazakhstan". Paleontological Journal 44(4): 384-390. .
It formerly contained the species Periaulax spiratus, which is currently recognized as Margarites spiratus.(1984). Annales de la Société royale zoologique de Belgique, Published by the Society 114-116: 316.
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