Isopoda is an order of crustacean, which includes woodlice and their relatives. Members of this group are called Isopods and include both terrestrial and aquatic species. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration. Females brood their young in a pouch under their thorax.
Armadillidiidae is a family of woodlice, a terrestrial crustacean group in the order Isopoda. Unlike members of some other woodlice families, members of this family can roll into a ball, an ability they share with the outwardly similar but unrelated pill millipedes and other animals. This ability gives woodlice in this family their common names of pill bugs or roly polies. Other common names include slaters,potato bugs, butchy boys and doodle bugs. Most species are native to the Mediterranean Basin, while a few species have wider European distributions. The best-known species, Armadillidium vulgare, was introduced to New England in the early 19th century and has become widespread throughout North America.
The Madison Cave isopod, Antrolana lira, is a freshwater, cave-dwelling crustacean species. It is in the family Cirolanidae and it is the only species of its genus Antrolana. This isopod can be found in flooded limestone caves and karst aquifers throughout the Great Appalachian Valley of Virginia and West Virginia. The Madison Cave isopod has been listed as a vulnerable species on the IUCN Red List since 1983 and as a threatened species under the United States Endangered Species Act since 1982. The species was named after the cave in which it was first discovered, Madison Saltpetre Cave. Very little is known about the life history and behavior of the Madison Cave isopod.
Arubolana imula is a species of crustacean in the family Cirolanidae, endemic to Aruba. It was described in 1979 by Lazare Botosaneanu and Jan Hendrik Stock.
Caecidotea barri, commonly known as the Clifton Cave isopod, is a species of crustacean in the family Asellidae. It is endemic to Kentucky in the United States.
Caecidotea nickajackensis is a species of isopod crustacean in the family Asellidae. It was believed to be endemic to a single cave in Tennessee, and was thought to have been exterminated when that cave was flooded in 1967 by the building of the Nickajack Dam, however, in 2013 the species was discovered within Horseskull Cave and Raccoon Mountain Caverns.
Lirceus culveri, the Rye Cove cave isopod, is a species of isopod in the family Asellidae. It is endemic to McDavids Cave in Scott County, Virginia in the United States.
Lirceus is a genus of isopod crustaceans in the family Asellidae that live in southern Canada and the eastern United States as far west as the Great Plains. Of the 15 species in the genus, two are listed as either endangered (EN) or vulnerable (VU) on the IUCN Red List.
Lirceus usdagalun is a rare species of crustacean known by the common name Lee County cave isopod. It is endemic to Virginia in the United States, where it is known from a single network of karst cave systems in Lee County. It is threatened by a number of processes. It is a federally listed endangered species of the United States, and is assessed as "endangered" by the International Union for Conservation of Nature.
Mexistenasellus is a genus of isopod crustaceans in the family Stenasellidae.
Mexistenasellus nulemex is a species of isopod crustacean in the family Stenasellidae. It is endemic to Mexico.
Mexistenasellus wilkensi is a species of isopod crustacean in the family Stenasellidae. It is endemic to Mexico.
Onchotelson is a genus of isopod crustaceans in the family Phreatoicidae, which is endemic to Tasmania. It contains two species, both of which are listed as vulnerable on the IUCN Red List:
Speocirolana thermydronis is a species of crustacean in the family Cirolanidae. It is endemic to Mexico and only known from springs near Cuatro Ciénegas, Coahuila. Its habitat is threatened by irrigation.
Sphaerolana is a genus of isopod crustaceans in the family Cirolanidae, all of which are endemic to Mexico.
Uramphisopus pearsoni is a species of isopod crustaceans in the family Phreatoicidae. It is only found in Brandum Bay basin in the north of Great Lake, Tasmania.
A woodlouse is any crustacean belonging to the suborder Oniscidea within the order Isopoda. They get their name from often being found in old wood, and from louse, a parasitic insect, although woodlice are neither parasitic nor insects.
Porcellio spinicornis is a species of woodlouse in the family Porcellionidae. This species is widespread in Europe, and has also been introduced to North America. It has wide spiny frontal lateral lobes.
Stenasellidae is a family of isopods belonging to the order Isopoda.
Mexistenasellus floridensis, the Florida cave isopod, is a species of isopod crustacean in the family Stenasellidae. It is endemic to Jackson County, Florida in the United States, where it is found only a single cave system within the Floridan aquifer.
