Polydesmida is the largest order of millipedes, containing approximately 3,500 species, including all the millipedes reported to produce hydrogen cyanide (HCN). Polydesmids have no eyes, and vary in length from 3 to 130 mm. Including the telson, adults have 19 or 20 rings. Polydesmids are very common in leaf litter, where they burrow by levering with the anterior end of the body.
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From album: National Parks and examples of Linking Tourism & Conservation of Ecuador