Philodromidae, also known as philodromid crab spiders and running crab spiders, is a family of araneomorph spiders first described by Tord Tamerlan Teodor Thorell in 1870. It contains over 600 species in thirty genera. Most are dull colored- brown, gray, yellowish or mottled with a leaf-like cardiac mark on the anterior dorsal abdomen, and seldom reach above 10 millimetres (0.39 in) long. None of the species build webs, but they do use silk for draglines and egg sacs.
Amaurobiidae is a family of three-clawed cribellate or ecribellate spiders found in crevices and hollows or under stones where they build retreats, and are often collected in pitfall traps. Unlidded burrows are sometimes quite obvious in crusty, loamy soil. They are difficult to distinguish from related spiders in other families, especially Agelenidae, Desidae and Amphinectidae. Their intra- and interfamilial relationships are contentious. According to the World Spider Catalog, 2019, the family Amaurobiidae includes about 275 species in 49 genera.
Chira is a genus of jumping spiders that was first described by George Peckham & Elizabeth Peckham in 1896. It is currently named after Rio Chira, a river in Peru, but the Peckhams originally called the genus Shira, later emended by Eugène Simon.
Cotinusa is a genus of jumping spiders that was first described by Eugène Louis Simon in 1900.
Mopiopia is a genus of jumping spiders that was first described by Eugène Louis Simon in 1902.
Naubolus is a genus of South American jumping spiders that was first described by Eugène Louis Simon in 1901.
Noegus is a genus of jumping spiders that was first described by Eugène Louis Simon in 1900.
Semnolius is a genus of South American jumping spiders that was first described by Eugène Louis Simon in 1902.
Castianeira is a genus of ant-like corinnid sac spiders first described by Eugen von Keyserling in 1879. They are found in Eurasia, Africa, and the Americas, but are absent from Australia. Twenty-six species are native to North America, and at least twice as many are native to Mexico and Central America.
Senoculus is a genus of araneomorph spiders in the family Senoculidae, and was first described by Władysław Taczanowski in 1872. It is the only genus in the family Senoculidae.
Tasata is a genus of South American anyphaenid sac spiders first described by Eugène Simon in 1903.
Attacobius is a genus of South American corinnid sac spiders first described by Cândido Firmino de Mello-Leitão in 1925.
Isoctenus is a genus of South American wandering spiders first described by Philipp Bertkau in 1880.
Schaenicoscelis is a genus of South American lynx spiders that was first described by Eugène Louis Simon in 1898.
Cleocnemis is a genus of South American running crab spiders that was first described by Eugène Louis Simon in 1886.
Fageia is a genus of Brazilian running crab spiders that was first described by Cândido Firmino de Mello-Leitão in 1929.
Acentroscelus is a genus of South American crab spiders that was first described by Eugène Louis Simon in 1886. It is a senior synonym of Whittickius.
Titidius is a genus of spiders in the family Thomisidae. It was first described in 1895 by Eugène Simon. As of 2017, it contains 20 species.
Xenoctenidae is a family of araneomorph spiders separated from Miturgidae in 2017.
Retiro is a genus of South American and Central American tangled nest spiders first described by Cândido Firmino de Mello-Leitão in 1915.
