Atopochetus dollfusii (trade name: Tonkinbolus dollfusi)
Identity confidence: provisional. This is a genus, group, or trade name rather than a confirmed species. Treat it as the closest match we can stand behind, and use the more conservative end of any range.
Red Dragon Millipede: Advanced Care Guide
Keeper Snapshot: The Vietnamese red dragon is a striking communal tropical millipede with dark body and red-banded segments. Sold under the trade name Tonkinbolus dollfusi, but the accepted name is Atopochetus dollfusii (Pocock, 1893). Standard humid-tropical millipede care: deep edible leaf-litter substrate, calcium, moisture with airflow. Adults reach about 4-5 inches.
Group: Industry StaplesDifficulty: Spice 2-3: Beginner / IntermediateSetup: Tropical communal millipede (humid)Handling: Brief contact tolerated. Handling is optional and never required for good care, and a fall can injure the animal.
Use This Guide Safely
- Confirm the exact animal. Match this guide to the species, locality, size, and life stage on your label. If the ID is uncertain, use the more conservative part of the range and ask before changing the setup.
- Change one thing at a time. Treat temperature and humidity as target zones, then watch posture, burrowing, drinking, feeding, and molt behavior before making another adjustment.
- Respect the handling boundary. If the guide says no handling, fast, defensive, or medically significant, plan transfers with catch cups, locked lids, and no bare hands. For serious bites, stings, or symptoms, seek emergency medical care.
Quick Snapshot
| Temperature | 72-80°F |
|---|---|
| Humidity | Moderate-High with cross ventilation; moist lower layer, drier surface (70-85%) |
| Setup Type | Tropical communal millipede (humid) |
| Substrate | Deep hardwood-leaf/rotted-wood substrate with organic soil; moist lower layer |
| Feeding | Decaying hardwood leaves, rotted wood, calcium, veggie supplements; no citrus |
| Care Difficulty | Spice 2-3: Beginner / Intermediate |
| Handling | Brief contact tolerated. Handling is optional and never required for good care, and a fall can injure the animal. |
Humidity zones: Very Low under 30% - Low 30-60% - Low-Moderate 40-70% - Moderate 60-80% - Moderate-High 70-85% - High 80%+ - Very High 90%+
Enclosure Format / Size Class
- terrestrial burrow setup for adults and groups
Warnings First
- Substrate is food: deep, edible, hardwood-leaf based
- Moist lower layer, ventilated above; don't let it dry out
- Needs calcium
- 'Ventilated above' works best as vents low on two opposite walls, so air crosses the food layer rather than passing over the lid.
Simple Care
- Deep edible substrate: decayed hardwood leaves, rotted wood, organic soil.
- Cross ventilation low on two opposite walls so the substrate surface keeps exchanging air.
- Moist lower layer with surface airflow; a moss patch helps.
- Shallow water dish packed with pebbles so juveniles cannot drown.
- Communal-tolerant in a roomy, deep, well-fed bin.
- Cuttlebone for calcium; veggies as treats; no citrus.
Advanced Keeper Notes
Enclosure & Microclimate
- A single hobby species: T. dollfusi (red dragon), Vietnam. Standard humid-tropical millipede setup: a deep, edible, hardwood-leaf-and-rotted-wood substrate kept moist below with airflow above.
- Communal groups are fine when substrate depth, leaf litter, and rotting wood are scaled to the group instead of the display cup.
- The red-banded coloring is the appeal; care is the same as any tropical millipede: deep edible substrate, moisture, calcium.
- Put the airflow low rather than only above: vents on two opposite walls at or just above the substrate, so air crosses the surface of the food layer. Because the substrate doubles as food, a still damp bin does not simply grow mold, it composts anaerobically and the substrate sours to the point the animals stop grazing.
- Ventilation and ambient humidity trade against each other. Carry the moisture in the deep layer rather than in still air, then ventilate freely.
- Judge by squeeze and smell rather than by gauge. Lower substrate clumps like a wrung-out sponge, releases no free water, and smells like forest floor. Sour or ammonia means more airflow and a substrate refresh.
- Keep a shallow water dish packed with pebbles so the waterline sits below the rim, and mist under the leaf litter and moss rather than over the surface. On a display species that also keeps the visible surface looking clean rather than permanently sodden.
Feeding, Growth & Maintenance
- Decayed hardwood leaves and rotted wood are the staple diet; cuttlebone for calcium; veggies as occasional supplements. No citrus, no treated wood or pesticides.
- Keep supplemental fruit/veg light to avoid flies and mold; remove it before it spoils.
- Molting: millipedes molt underground, sealing into a chamber and going still for days or weeks. Never dig up or disturb a buried animal, keep that part of the substrate from drying out, and keep cuttlebone available, since they eat the shed exoskeleton to reclaim calcium.
Possible Origin / Range
- Likely native range: Vietnam: tropical forest leaf litter.
- Habitat translation: A deep, edible, hardwood-leaf-and-rotted-wood substrate, moist below with airflow above, plus a cuttlebone and detritus to graze on.
Advanced Keeper Details
- Adult size ~4-5 in; a long-lived detritivore.
- Beginner-friendly once you've got the deep-edible-substrate concept; the 'beginner-intermediate' nod is mostly availability.
- Communal-tolerant in a roomy, deep, well-fed bin.
- Taxonomy note: the trade name for this animal is wrong on three counts, and it is worth knowing because it is repeated by nearly every vendor. The epithet is usually spelled 'dollfusi' but the original is dollfusii (Pocock, 1893). The genus Tonkinbolus Verhoeff, 1938 is itself unaccepted in MilliBase, with Litostrophus as the valid name for that genus. And this particular species does not sit there anyway: the accepted combination is Atopochetus dollfusii (Pocock, 1893), family Pachybolidae. Sold as Tonkinbolus dollfusi because that is what suppliers and customers search for. That name is a trade alias, not the currently accepted binomial.