Tridontomidae is a small family of millipedes. Its members are endemic to Guatemala.[1] These millipedes range from 22 mm to 28 mm in length and are uniformly grayish in color; their legs and antennae are unusually long and slender.[2] This family includes the remarkable species Aenigmopus alatus, in which adult males feature no gonopods.[3][4] This millipede is the only species in the infraclass Helminthomorpha without gonopods.[5]
The family is divided into the following genera:[6]