Armadillidium is a genus of the small terrestrial crustacean known as the woodlouse. Armadillidium are also commonly known as pill woodlice, leg pebbles, pill bugs, roly-poly, or potato bugs, and are often confused with pill millipedes such as Glomeris marginata. They are characterised by their ability to roll into a ball ("volvation") when disturbed.
Porcellionidae is a terrestrial family of the order Isopoda.
Haplophthalmus is a genus of woodlice in family Trichoniscidae. It contains 47 described species, of which two are listed as vulnerable species on the IUCN Red List – Haplophthalmus abbreviatus and Haplophthalmus rhinoceros.
Styloniscus is a genus of woodlice in the family Styloniscidae. It contains the following species as of 2010:
Mahehia is a genus of woodlice in the family Porcellionidae, which is endemic to the Seychelles. It contains the following species:
Lucasius is a genus of the family Porcellionidae. It includes the following species:
Trichoniscidae are a family of isopods (woodlice), including the most abundant British woodlouse, Trichoniscus pusillus.
Ligiidae is a family of woodlice, the only family in the infraorder Diplocheta. Its members are common on rocky shores, in similar habitats to those inhabited by species of the bristletail Petrobius and the crab Cyclograpsus. The family contains the following genera:
Porcellionides is a genus of woodlice in the family Porcellionidae. It includes the following species :
Ligidium is a genus of woodlice. It contains approximately 46 species, six of which are probably taxonomic synonyms of Ligidium hypnorum or Ligidium germanicum. Of the remainder, eight species are found in North America, six in Japan, two in Taiwan, four in China, twelve in Turkey, the Caucasus and Central Asia, and six in Greece.
Hemilepistus reaumuri is a species of woodlouse that lives in and around the deserts of North Africa and the Middle East, "the driest habitat conquered by any species of crustacean". It reaches a length of 22 mm (0.87 in) and a width of up to 12 mm (0.47 in), and has seven pairs of legs which hold its body unusually high off the ground. The species was described in the Description de l'Égypte after the French Campaign in Egypt and Syria of 1798–1801, but was first formally named by Henri Milne-Edwards in 1840 as Porcellio reaumuri. It reached its current scientific name in 1930 after the former subgenus Hemilepistus was raised to the rank of genus.
Porcellio pumicatus is a species of woodlouse in the genus Porcellio belonging to the family Porcellionidae. This species is known to occur in Central Italy and on Sardinia. Adults reach about 15 millimetres (0.59 in) long and can mostly be encountered under stones.
Trachelipus is a genus of woodlice in the family Trachelipodidae, containing the following species:
Hemilepistus schirasi is a species of woodlouse that lives in and around the deserts of central and southern Iran. It can be distinguished from other species of Hemilepistus in Iran by the pattern of tubercles on the head. H. schirasi has six large tubercles in a semicircle, and rows of three tubercles extending to the outside corners of the head; other species have more tubercles, in different arrangements.
Armadillidae is a family of woodlice, comprising around 80 genera and 700 species. It is the largest family of Oniscidea, and one of the most species-rich families of the entire Isopoda. Armadillids generally have a strongly convex body shape, with some rather shallowly convex. Like members of the woodlice family Armadillidiidae, armadillids are capable of enrolling into a sphere (conglobation), and are commonly known as pill bugs. Armadillids differ from the Armadillidiidae in that the antennae are fully enclosed within the sphere.
Armadillidium nasatum is a large, Britain-based species of woodlouse that has been introduced to North America, along with Armadillidium vulgare also found in other parts of Europe.
Rhyscotus is a genus of armadillo woodlice, land crustacean isopods of the family Rhyscotidae. It was first described in 1885 by Gustav Budde-Lund.
Alloniscus is the sole genus in the woodlice family Alloniscidae. There are more than 20 described species in Alloniscus.
Helleria brevicornis, the sole species of the monotypic genus Helleria, is a terrestrial woodlouse endemic to the islands and coastal regions of the northern Tyrrhenian sea. H. brevicornis is of interest due to its endemism, unique ecology and basal position in the suborder Oniscidea.
Alpioniscus is a southern European genus of woodlice in the family Trichoniscidae. Alpioniscus consists of two subgenera: Alpioniscus s.s. and Illyrionethes. A 2019 study used molecular and taxonomic analyses to verify the validity of the current taxonomy, resulting in the redescription of several species and the description of two new species.
