Tylobolus
Sign in to saveTylobolus 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.
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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.
==Description== Species of Tylobolus are medium to large millipedes ranging from long and wide, with females attaining larger sizes than males. They are cylindrical, or nearly so, and possess 40 to 54 segments (body rings) as adults. Body color ranges from black to reddish brown, the posterior margin of each ring may be faintly or strongly colored in red or yellow. The body rings are mostly smooth or with a very fine texture. The two eyes, each composed of 27-50 ocelli in a patch or "ocular field", are widely separated, with more than twice the width of a patch between them.