Piromis arenosus är en ringmaskart som beskrevs av Johan Gustaf Hjalmar Kinberg 1866. Piromis arenosus ingår i släktet Piromis och familjen Flabelligeridae.
Artens utbredningsområde är Röda havet. Inga underarter finns listade i Catalogue of Life.
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Kategori:Havsborstmaskar arenosus