Coastal
Guides
Tylidae
Calloused Beach Pillbugs and Heller's Isopod
Tylidae is a family of terrestrial isopods (woodlice) comprising approximately 27 species, with all but one species placed in the genus Tylos; the sole exception is Helleria brevicornis. Together with Ligiidae, Tylidae represents an early-diverging lineage among woodlouse families. Members are primarily associated with coastal sandy beach habitats in the supralittoral zone.
Tylos niveus
Snowy Calloused Beach Pillbug
Tylos niveus is a coastal isopod in the family Tylidae, first described by Budde-Lund in 1885. A 2000 redescription provided a new diagnosis for the species and documented its expanded latitudinal distribution. The species has been recorded from sandy beach habitats in Brazil, with a new occurrence reported from Taquaras, Santa Catarina, extending its known range to 27°S.