Ephebopus spp.
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.
Skeleton Tarantulas: Advanced Care Guide
Keeper Snapshot: The skeleton tarantulas: a defensive, fast burrower that's the most 'Old World-like' New World tarantula, and the only tarantula with urticating hairs on its pedipalps (it kicks them off the palps at threats). E. cyanognathus has blue chelicerae. Adults reach about 4.5-6 inches across.
Group: Industry StaplesDifficulty: Spice 3: IntermediateSetup: Fossorial (deep burrow)Handling: Not recommended
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 | 75-82°F |
|---|---|
| Humidity | Moderate ambient (65-75%) with cross ventilation at substrate level; moist burrow-holding substrate |
| Setup Type | Fossorial (deep burrow) |
| Substrate | Moist soil/coco mix, 6 in+, that holds a burrow; cork-bark burrow entrance |
| Feeding | Medium-fast feeder: slings weekly, adults every 1-2 weeks |
| Care Difficulty | Spice 3: Intermediate |
| Handling | Not recommended |
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
- Compact secure enclosure while it's a tiny sling
- Deep moist fossorial burrow setup for juveniles and adults: needs more substrate depth than a Burrow Buddy can give
Warnings First
- Defensive and fast for a New World species: the most 'OW-like' NW tarantula
- Urticating hairs on the pedipalps, not the abdomen: kicked at threats
- Obligate burrower. Give real depth, don't dig it out
- A deep moist burrow exchanges almost no air at the bottom. Cross ventilation at the substrate line is what connects the tunnel to fresh air.
Simple Care
- Deep moist substrate (6 in+) that holds a burrow, with a cork-bark entrance.
- Cross ventilation low on two opposite walls, at the substrate line, so the burrow column can breathe.
- A water dish with pebbles in it so slings cannot drown; keep the substrate moist, not soggy.
- Tool-based maintenance; expect a defensive burrower, not a pet rock.
Advanced Keeper Notes
Enclosure & Microclimate
- The hobby names: E. murinus (skeleton tarantula), E. cyanognathus (blue-fang), E. uatuman (red skeleton), E. rufescens: gallery forest of northern South America.
- Ephebopus sits in Psalmopoeinae alongside Psalmopoeus, Pseudoclamoris and Tapinauchenius, not in Aviculariinae where older care sheets place it. Despite having arboreal relatives, these are fossorial: a deep, moisture-holding substrate with a cork-bark burrow entrance, not a vertical arboreal setup.
- Build cross ventilation in at the substrate line rather than relying on the lid. Put vents low on two opposite walls so air crosses the top of the damp column and stays connected to the burrow below. A six-inch moist column vented only through the lid leaves a drying surface over a stagnant tunnel, which is where the spider actually lives.
- Ventilation and ambient humidity are one system, and on a fossorial the substrate carries the moisture rather than the air. Hold 65 to 75% by keeping the column moist and running a dish under free-flowing vents, not by sealing the enclosure.
- Judge by the substrate rather than a gauge. It should pack well enough to hold a tunnel and feel moist at depth without weeping water when squeezed, with the top surface allowed to look drier. Collapsing tunnels means too dry; a sour smell means too wet or too still.
- Keep a water dish with pebbles or coarse grit so the waterline sits below the rim. Slings drown in dishes, and on a defensive burrower a safe permanent dish means fewer reasons to go in.
- Water at the burrow entrance or down one side rather than misting the surface. That recharges the column where the microclimate is and leaves the surface and the airflow alone.
Feeding, Growth & Maintenance
- Medium-fast feeders: slings weekly, adults every week or two; prey dropped near the burrow mouth.
- Defensive and quick; the unique trick is that the urticating setae are on the pedipalps and get kicked at a threat. Maintenance is hands-out.
- Molting: a premolt tarantula turns sluggish, seals up its burrow, and refuses food for days or even weeks. Pull any uneaten feeders, leave it strictly alone, and wait 5-10 days after the molt (until the new fangs and exoskeleton harden) before feeding again.
Possible Origin / Range
- Likely native range: Northern South America: gallery forest.
- Habitat translation: Deep, moisture-holding substrate that supports a burrow, a cork-bark burrow entrance, a water dish, and a moist (not soggy) microclimate.
Advanced Keeper Details
- Adult size ~4.5-6 in DLS; medium-fast growth; females ~10-12 years.
- Genuinely the most 'Old World-like' New World tarantula: defensive, fast and a committed burrower; a useful stepping stone in temperament between docile NW terrestrials and true OW.
- E. cyanognathus's blue chelicerae are the genus showpiece, visible mostly when it threat-postures from the burrow mouth.
- Taxonomy note: Ephebopus is one of the most-moved genera in Theraphosidae and has been placed in nearly every subfamily at some point. Molecular phylogenetics (Luddecke et al. 2018; Turner et al. 2018) places it in Psalmopoeinae with Psalmopoeus, Pseudoclamoris and Tapinauchenius. Care sheets that call it an aviculariine, or that reason from pinktoe husbandry, are working from an outdated placement.