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Rough Giant Vinegaroon

Mastigoproctus scabrosus

VinegaroonbeginnerHarmless

No venom, no sting

Vinegaroons are harmless to humans — no venom and no sting. If threatened they can spray a fine acetic-acid mist (it smells like vinegar) and give a firm pinch, but neither is dangerous. Avoid getting the spray in your eyes.

Sprays acetic acid

Can spray a fine, concentrated vinegar mist when threatened. Not dangerous to skin, but genuinely painful in the eyes — keep it below face level when handling.

About

A giant vinegaroon recently recognized as a full species (long lumped under Mastigoproctus giganteus). Care is identical to the giant vinegaroon: a deep, burrowable substrate kept with a moisture gradient, a hide, and a water dish at warm temps. It has no venom — it sprays a vinegar-like acetic-acid mist in defense (avoid getting it in your eyes). Docile, hardy, and long-lived; an excellent beginner arachnid.

Taxonomy

FamilyThelyphonidae
GenusMastigoproctus
Native regionSouthwestern USA and Mexico
TypeFossorial
Temperamentdocile; sprays acetic acid when threatened

Size & growth

Adult size2.5-3 inches
Body length1.97–2.95 in
Growth rateslow
Life stagesNumbered instars

Climate

Temperature75–85°F
Humidity60–75%

Enclosure

Adult sizeterrestrial tank with deep substrate
Substratedeep coco/topsoil that holds a burrow; hide; light moisture gradient; water dish
Substrate depth4-6 inches
Water dishRequired

Feeding

Feeding modePredator (live prey)
Prey sizecrickets, roaches
Adult cadence1 prey per week

Times kept: 0