Spirobolida

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 eighth and ninth leg pairs: the posterior gonopods are used in sperm-transfer while the anterior gonopods are fused into a single plate-like structure. thumb|Front and rear views of the anterior (A, B) and posterior left (

species of myriapod

species of myriapod

Pachybolidae is a family of round-backed millipedes of the order Spirobolida. The family includes 49 different genera. Two subfamilies are recognized.

Pseudospirobolellidae is a family of round-backed millipedes of the order Spirobolida. The family includes 12 species belonging to seven genera.

Rhinocricidae is a family of millipedes, that occurs disjunctly in Malesia and neighbouring parts of Australasia and in the Neotropics. The family contains the following genera:

species of myriapod

Typhlobolellidae is a family of millipedes belonging to the order Spirobolida.

species of myriapod

Spirobolidae is a family of millipedes in the order Spirobolida. The family consists of several genera with numerous species, and is commonly divided into the subfamilies Spirobolinae and Tylobolinae.

Narceus is a genus of large cylindrical millipedes of the family Spirobolidae native to eastern North America. The genus comprises three or four species, two of which are endemic to Florida, and the remainder forming a species complex. The species of Narceus include some of the largest and most recognizable millipedes in eastern North America.

Atopetholidae is a family of millipedes in the order Spirobolida. There are about 18 genera and at least 60 described species in Atopetholidae.

species of myriapod

The family Messicobolidae is one of the smaller families of millipedes in the order Spirobolida (fewer than 30 described species). In general appearance, messicobolids are medium to large size spirobolids and are often brightly colored. Messicobolids occur in mountainous regions of Mexico, Guatemala, Honduras and El Salvador. Oak/pine forest and montane rain forest are the typical habitats in these environments and messicobolids are generally associated with decomposing logs and leaf litter of broad-leaved trees.

Allopocockiidae is a family of millipedes in the order Spirobolida. There are about five genera and eight described species in Allopocockiidae.

species of myriapod

thumb | right | alt=Spirobolus marginatus | Spirobolus marginatus Spirobolus is a genus of millipedes in the family Spirobolidae.

Spirobolellidae is a family of millipedes in the order Spirobolida. There are about 11 genera and more than 100 described species in Spirobolellidae.

species of myriapod

Trigoniulus is a genus of millipede in the family Trigoniulidae. There are at least 90 described species in Trigoniulus.

Tylobolus is a genus of millipedes in the order Spirobolida with seven known species found in western North America. It is in the family Spirobolidae, and is the type genus of the subfamily Tylobolinae. The genus was named by Orator F. Cook in 1904.

Spiromimus is a genus of millipedes in the family Pachybolidae. They mostly live in rainforests and dry land.

Trigoniulidae, is a family of round-backed millipedes of the order Spirobolida. The family includes 171 species in 25 genera.