Identification
The Texas Crested Millipede (*Abacion texensis*) is a striking departure from the smooth, "hot dog" shape of common garden millipedes. Measuring between 20mm and 50mm, this species is exceptionally slender and cord-like. Its most distinguishing field mark is the series of prominent longitudinal ridges, or "crests," that run the length of its 45–60 body segments, giving it a rugged, armored appearance. Coloration is typically a sophisticated charcoal or brownish-grey, accented by a pale, creamy mid-dorsal stripe and lighter-colored legs that create a flickering effect when the animal is in motion.
Habitat & Range
True to its name, this species is a staple of the South-Central United States, ranging from the limestone plateaus of Texas through the Ozark plateau and into the Gulf States. You’ll find them in the "duff" layer—the moist, decaying interface between fallen leaves and soil. They are particularly fond of oak-hickory forests and rocky outcrops where limestone provides the calcium necessary for their rigid exoskeletons.
Behaviour
While most millipedes react to danger by curling into a tight, passive spiral, *Abacion texensis* is a "thrasher." If uncovered, it will sprint with surprising agility or whip its body violently to deter predators. They are primarily nocturnal, emerging from deep leaf litter during humid nights to explore. During the breeding season, males can be distinguished by their specialized legs (gonopods) on the seventh segment, used to transfer sperm to the female in a slow, rhythmic courtship.
Diet
These are the forest’s essential recyclers. As detritivores, they use their tiny, scraping mandibles to consume decaying wood, fungal spores, and leaf litter. By breaking down tough cellulose, they return vital nutrients to the soil, acting as a microscopic "clean-up crew" for the woodland floor.
Fascinating Fact
Unlike many of their cousins, members of the order Callipodida possess silk-spinning organs! *Abacion texensis* has specialized spinnerets located on its final body segment, which it uses to weave silken "molting chambers" or protective mats for its eggs, a rare architectural feat in the millipede world.