Expanded Isopod

Porcellio expansus

Cultivar name: “White”



12 mixed: $150
50 mixed: $500
100 mixed: $800


Detailed Species Stats -Click-

  • Adult Size: 25-35 mm.
  • Care Level: Intemediate.
  • Temperature Requirements: 70-85 degrees Fahrenheit.
  • Air Humidity: Dry.
  • Substrate Humidity: Moist.
  • Favorite Foods: Not picky.
  • Locality: None.

This giant isopod is perhaps one of the largest terrestrial species in existence. Hailing from montane regions in northeastern Spain, this species inhabits leaf litter accumulations and rock crags which are used for shelter during dry periods. This “White” color form is found further north and east than the “Orange” color form. In captivity good ventilation is important, though the substrate should still be consistently moist as the young are particularly susceptible to drying out. As with some other large Porcellio species, male expanded isopods may establish small territories in their enclosure, keeping a harem of mature females nearby and lazily defending it from other males. Only males possess the long, flamboyant uropods, which do not fully extend until the male has completed a molt to maturity. The Latin name “expansus” may refer to the extended, flattened body segments, or to the expansion of the male’s uropods upon maturity. As with most isopods this species is not picky and Roach Crossing’s colony does well on diet of well-rotted black oak leaves, assorted fruits, and low-quality dog food.