Siphonocryptida is an order of millipedes, comprising the sole family Siphonocryptidae. With only seven described species, the Siphonocryptida is the second smallest millipede order, surpassed only by Siphoniulida, with two species. A 2026 paper found the order to be nested inside Polyzoniida.
Classification Hirudicryptus Enghoff & Golovatch, 1995 Hirudicryptus canariensis (Loksa, 1967) - Canary Islands Hirudicryptus taiwanensis Korsós et al., 2008 - Taiwan Hirudicryptus quintumelementum Korsós et al., 2009 - Nepal Hirudicryptus abchasicus Golovatch, Evsyukov & Reip, 2015 - NW Caucasus Siphonocryptus Pocock, 1894 Siphonocryptus compactus Pocock, 1894 - Sumatra Siphonocryptus latior Enghoff & Golovatch, 1995 - Peninsular Malaysia Siphonocryptus zigzag Enghoff, 2010 - Pahang
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