Order
Spirobolida
Tylobolus uncigerus. Photo: (c) León Simón Sánchez, some rights reserved (CC BY-NC)
Spirobolida is an order of “round-backed” millipedes containing approximately 500 species in 12 families. Its members are distinguished by the presence of a “pronounced suture that runs “vertically down the front of the head”. Most of the species live in the tropics, and many are brightly coloured. Mature males have two pairs of modified legs, the gonopods, consisting of the 8th and 9th leg pair: the posterior gonopods are used in sperm-transfer while the anterior gonopods…
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