Barychelidae

Barychelidae, also known as brushed trapdoor spiders, is a spider family with about 300 species in 39 genera.

Behaviour
Most spiders in this family build trapdoor burrows. For example, the 20 mm long Sipalolasma builds its burrow in rotted wood, with a hinged trapdoor at each end. The 10 mm long Idioctis builds its burrow approximately 5 cm deep, just below the high tide level, sealing the opening with a thin trapdoor.

Some species avoid flooding by plugging their burrows, while others can avoid drowning by trapping air bubbles within the hairs covering their bodies. Some members of this group have a rake on the front surface of their chelicerae used for compacting burrow walls. These spiders can run up glass like tarantulas, and some can stridulate, though it isn't audible to humans.

Distribution
Barychelids are found in Australia, New Caledonia, South America, Africa, Madagascar, India, New Guinea, and Pacific islands.

Genera
, the World Spider Catalog accepts the following genera:


 * Adelonychia Walsh, 1890 – India
 * Ammonius Thorell, 1899 — Cameroon
 * Atrophothele Pocock, 1903 — Yemen
 * Aurecocrypta Raven, 1994 — Australia
 * Barycheloides Raven, 1994 — New Caledonia
 * Barychelus Simon, 1889 — New Caledonia
 * Cosmopelma Simon, 1889 — Brazil
 * Cyphonisia Simon, 1889 — Africa
 * Encyocrypta Simon, 1889 — New Caledonia
 * Eubrachycercus Pocock, 1897 — Somalia
 * Fijocrypta Raven, 1994 — Fiji
 * Idioctis L. Koch, 1874 — Oceania, Africa, Singapore
 * Idiommata Ausserer, 1871 — Australia
 * Idiophthalma O. Pickard-Cambridge, 1877 — South America
 * Mandjelia Raven, 1994 — Australia
 * Monodontium Kulczyński, 1908 — Singapore, Papua New Guinea, Indonesia
 * Moruga Raven, 1994 — Australia
 * Natgeogia Raven, 1994 — New Caledonia
 * Neodiplothele Mello-Leitão, 1917 — Brazil
 * Nihoa Raven & Churchill, 1992 — Papua New Guinea, Vanuatu
 * Orstom Raven, 1994 — New Caledonia
 * Ozicrypta Raven, 1994 — Australia
 * Paracenobiopelma Feio, 1952 — Brazil
 * Pisenor Simon, 1889 — Africa
 * Plagiobothrus Karsch, 1892 — Sri Lanka
 * Questocrypta Raven, 1994 — New Caledonia
 * Rhianodes Raven, 1985 — Malaysia, Singapore, Philippines
 * Sason Simon, 1887 — Asia, Oceania, Seychelles
 * Sasonichus Pocock, 1900 — India
 * Seqocrypta Raven, 1994 — Australia
 * Sipalolasma Simon, 1892 — Asia, Africa
 * Strophaeus Ausserer, 1875 — Brazil, Peru, Panama
 * Synothele Simon, 1908 — Australia
 * Tigidia Simon, 1892 — Madagascar, Mauritius
 * Trittame L. Koch, 1874 — Australia
 * Troglothele Fage, 1929 — Cuba
 * Tungari Raven, 1994 — Australia
 * Zophorame Raven, 1990 — Australia
 * Zophoryctes Simon, 1902 — Madagascar
 * †Megamonodontium McCurry, Frese & Raven, 2023