This very large species is native to the southern Iberian Peninsula, Morocco and the Balearic Islands.

Porcellio hoffmannseggii is considered to be one of the largest terrestrial isopod species, with adults able to grow to be over 1.5 inches (3.8 cm) long.

They are typically dark grey or black, with a thin white skirt around the edge of their body.

There are current 4 identified subspecies, which are as follows:[3] Porcellio hoffmannseggii does not conglobate like some of their other isopod cousins, commonly called pillbugs.

[5] Porcellio hoffmannseggii is common in the Oued Laou region of north-eastern Morocco, when compared to the distribution of other isopod species in the country.