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Desert Millipede

Orthoporus ornatus

MillipedebeginnerHarmlessCommunal OK

No venom, no sting

Millipedes don't bite or sting and have no venom. Many do secrete defensive chemicals when stressed, so wash your hands after handling and keep them away from your eyes and mouth.

Secretes benzoquinones

Stains skin brown for several days and stings badly in the eyes or on broken skin. Wash your hands after handling, don't rub your face, and keep it well away from small children.

About

A hardy, handleable desert millipede and a classic beginner species — long-lived (around a decade with good care). Unlike tropical millipedes it needs strong ventilation: moisten only about a third of the substrate (deep, loose, with oak leaf litter on top) and let the rest stay drier, targeting 60-80% humidity without stagnation. Room warmth (75-80°F); never put a heat mat under the substrate. A detritivore — the leaf litter and rotting wood are its food, plus a calcium source. Harmless, though it can release a staining defensive fluid, so wash hands after handling.

Taxonomy

FamilySpirostreptidae
GenusOrthoporus
Native regionSouthwestern USA, northern Mexico
TypeTerrestrial
Temperamentdocile; handleable

Size & growth

Adult size4-9 inches
Body length3.94–9.06 in
Growth rateslow
Life stagesNo distinct stages
DevelopmentAnamorphic — gains segments with each moult

Millipedes molt underground in a small chamber and can stay buried for weeks. If yours has disappeared into the substrate, leave it be — digging it up mid-molt can kill it.

Climate

Temperature75–80°F
Humidity60–80%

Enclosure

Adult sizeterrestrial tank with deep substrate; good ventilation
Substratedeep coco/soil + decaying hardwood leaf litter & rotten wood; add calcium (cuttlebone)
Substrate depth3-4 inches
Water dishOptional
Moisture gradientRequired — keep one end damp, one end dry

Feeding

Feeding modeDetritivore (decaying matter)
Food & schedulecontinuous — leaf litter, decaying hardwood, veg + calcium
Supplemental calciumRequired — cuttlebone or a calcium powder

Times kept: 0