This one comes from a single small corner of the world: a scatter of caves and hills around Verona, and nowhere else. Rarity is written into its geography. Armadillidium ruffoi, or Ruffo's Pillbug, is a rare Italian pillbug endemic to the Province of Verona in northern Italy, where it lives in and around cool limestone caves and the rocky slopes above them. That tiny natural range is the whole appeal, and it is also why captive-bred stock is the responsible way to keep the species: there is no wild population to spare, so every animal you take on should trace back to a settled colony rather than a collecting trip.
It is a medium Armadillidium, reaching somewhere around 16mm when fully grown, so it carries a little more presence than the smaller members of the genus without ever looking bulky. The body is dark grey, closer to slate than black, marked with paler marbling that breaks the shell into soft, irregular patches rather than crisp bands. Like every pillbug it conglobates, rolling into a tight, seamless ball when it feels exposed or when you lift a piece of cork to look for it, then unfurling a few seconds later and carrying on. That quiet, armoured character is a good part of why keepers want it.
Beyond the looks, it earns its place through temperament. This is a slow, steady breeder rather than an explosive one, and it is unusually long-lived for an isopod, averaging around two and a half years. Those two traits together give you a colony that stays manageable, never outgrows its tub in a season, and lets you follow individuals over a long stretch. If you already keep collectable Mediterranean species such as Armadillidium gestroi, Armadillidium granulatum or the familiar Armadillidium maculatum, Ruffo's Pillbug settles in comfortably beside them, and it makes a natural shelf-mate for another cave-country rarity, Armadillidium beieri. The full range sits in the Armadillidium collection.
Care sits at a medium level, well within reach of anyone with a little Armadillidium experience behind them. Keep the tub at room temperature, since a normal heated home suits it the year round with no extra warmth. Aim for moderate humidity with a gradient across the enclosure, damp at one end and noticeably drier at the other, so the animals choose their own comfort rather than sitting in constant wet, and back that up with medium-to-high ventilation to keep the air fresh. Give them a deep substrate, using a rich base such as flake soil, and work in chunks of limestone and plenty of cork bark so the layout echoes the cave edges they come from. Leaf litter is the base of the diet, topped up often and left to soften down, with calcium on offer at all times through cuttlebone or crushed limestone mixed through the soil. A springtail culture makes a useful clean-up partner, holding mould in check in the damper corners.
Breeding rewards patience above all. Ruffo's Pillbug builds its numbers gradually, adding a few young at a time instead of flooding the tub, so the colony grows on a timescale of seasons rather than weeks. Give it stable warmth, steady moisture with that drier end kept intact, and a constant supply of calcium and leaf litter, then leave it largely undisturbed and let the population find its own pace. Start with a slightly larger group where you can, since a broader base of adults makes for a healthier, more resilient colony and a touch more genetic spread. If the way markings and colour pass down the generations draws you in, our guide to isopod genetics, colours and morphs is a good place to read on.
Every order is captive-bred and packed for the journey, with a ventilated tub bedded on damp sphagnum and cushioned inside a double-walled box. We send them out Monday to Thursday on a tracked next-day Royal Mail service, delivered by 1pm, and every parcel is covered by our live-arrival guarantee. We always tuck in a 20% overcount too, so you receive a few more than the number on the label.
