Keeper guide

Skeleton Leg Tarantula Moulting Guide — Ephebopus murinus

Moulting is a normal part of growth for Ephebopus murinus. Before a moult, Skeleton Leg Tarantulas may stop eating, spend more time hidden, increase webbing or show visible changes to the abdomen.

At a glance

Quick facts

World
New World
Origin
French Guiana, Suriname and Brazil
Lifestyle
Fossorial
UK hobby rarity
Uncommon
Maximum size
About 12–15 cm (4.5–6 in)
Growth rate
Moderate
Male lifespan
Around 3–4 years
Female lifespan
Often 10–15 years
Temperament
Fast, reclusive and defensive when exposed; usually retreats into the burrow
Venom
Venomous, but bites are not generally considered medically significant; urticating hairs are an important contact hazard
Temperature
22–26°C
Moisture / humidity
Moisture-dependent fossorial setup with damp lower substrate, a drying surface, water and strong cross-ventilation
CITES
Not CITES-listed

Recognising premoult

Food refusal is one common premoult sign in Ephebopus murinus, especially when it appears alongside heavier webbing, retreat closure or a darker exposed abdomen. Not every Skeleton Leg Tarantula shows every sign.

Once premoult looks likely, stop offering live prey and keep fresh water available. Do not keep testing Ephebopus murinus's appetite every day.

Preparing the enclosure

Leave the main retreat intact for Ephebopus murinus. Remove loose feeders, check the water dish and avoid unnecessary rehousing or major enclosure work while the spider is preparing to moult.

Stable temperature and normal moisture are more useful than sudden changes. Keep Ephebopus murinus within its normal range of 22–26°C and follow the usual moisture pattern for the species.

During the moult

A Skeleton Leg Tarantula may moult on its back, side or in another position that looks unusual to a new keeper. Do not flip the spider over or touch it simply because the posture looks alarming.

Give Ephebopus murinus space. Intervention during a normal moult can cause more harm than leaving the spider alone, so watch from outside the enclosure unless there is a clear, specific emergency.

After the moult

After Ephebopus murinus emerges, the new exoskeleton and fangs are soft. Keep water available and wait for the spider to harden before offering food.

Small Skeleton Leg Tarantulas harden sooner than large adults. Instead of using one fixed number of days for every spider, wait until movement looks normal and the fangs have darkened.

Using the exuvia

A well-preserved moult from Ephebopus murinus can be useful for confirming sex and keeping growth records. Remove it only when doing so will not disturb the spider.

Date the exuvia if you keep records for a Skeleton Leg Tarantula. Over time, moult dates provide a much clearer picture of growth than trying to estimate age from size alone.

When a delay is normal

Premoult can last much longer in a large Ephebopus murinus than in a tiny sling. A period of hiding and fasting is not automatically a failed moult or an emergency.

Keep the enclosure stable and watch for actual problems rather than the passage of time alone. If a Skeleton Leg Tarantula is secure, has water and is behaving like a premoult spider, patience is usually the right response.