Armadillidium granulatum is a species of terrestrial isopod, commonly known as a pill bug or roly-poly. This species belongs to the Armadillidiidae family and is known for its ability to roll into a tight ball (conglobation) as a defensive mechanism. Armadillidium granulatum is particularly noted for its distinctive granulated exoskeleton, which sets it apart from other species in the Armadillidium genus.

Appearance

Armadillidium granulatum has a distinctive rough-textured exoskeleton with a granulated appearance, providing it with a somewhat rugged look. Its coloration typically ranges from gray to brown, often with mottled or speckled patterns that help it blend into its natural habitat.

Habitat

This species is native to parts of Europe, particularly in Mediterranean regions. It is commonly found in moist environments such as under rocks, logs, and leaf litter where it can find ample decaying organic matter to feed on. It thrives in environments with high humidity, which helps prevent desiccation.

Behavior

Armadillidium granulatum, like other pill bugs, is primarily nocturnal, becoming more active at night when the risk of desiccation is lower. During the day, it hides in damp, shaded areas. Its ability to roll into a ball protects it from predators and helps retain moisture.

Care in Captivity

For those interested in keeping Armadillidium granulatum as pets, it is essential to replicate their natural environment as closely as possible:

1. Enclosure: A terrarium or vivarium with good ventilation and a secure lid.
2. Substrate: A moist substrate composed of coconut coir, sphagnum moss, and leaf litter.
3. Humidity: Maintaining high humidity levels is crucial, achieved through regular misting and providing a moisture-retentive substrate.
4. Diet: A diet of decaying organic matter, such as leaf litter, rotting wood, and specially formulated isopod food.
5. Hiding Places: Provide ample hiding spots with rocks, bark, and leaf litter to mimic their natural habitat.

Armadillidium granulatum is a relatively low-maintenance pet, making it suitable for hobbyists interested in keeping isopods. With proper care, they can thrive in captivity and contribute to a fascinating invertebrate collection.