| Spirobolida | |
|---|---|
| | |
| Narceus americanus | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Myriapoda |
| Class: | Diplopoda |
| Superorder: | Juliformia |
| Order: | Spirobolida Bollman, 1893 |
| Families | |
12: See text | |
| Synonyms | |
| |
Spirobolida is an order of "round-backed" millipedes containing approximately 500 species in 12 families. [1] Its members are distinguished by the presence of a "pronounced suture that runs "vertically down the front of the head". [2] Most of the species live in the tropics, and many are brightly coloured. [2] 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 are fused into a single plate-like structure. [3]
The families are divided into two suborders: [1]
Suborder Spirobolidea
Suborder Trigoniulidea