Tylidae is a

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

woodlice A woodlouse (plural woodlice) is an isopod crustacean from the polyphyleticThe current consensus is that Oniscidea is actually triphyletic suborder Oniscidea within the order Isopoda. They get their name from often being found in old wood. ...

. It contains approximately 27 species, all but one in the genus ''

Tylos Tylos ( grc, Τύλος) was the Greek exonym of ancient Bahrain in the classical era, during which the island was a center of maritime trade and pearling in the Eurythraean Sea.Curtis E. Larsen, ''Life and Land Use on the Bahrain Islands: The ...

'', the other being ''

Helleria brevicornis ''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 ...

''. Together with the family

Ligiidae Ligiidae is a family (biology), family of woodlouse, 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 ...

, Tylidae appears to have diverged early from the remaining woodlouse families.

References

Woodlice Crustacean families {{isopod-stub