The Thomisidae are a family of spiders, including about 170 genera and over 2,100 species. The common name crab spider is often linked to species in this family, but is also applied loosely to many other families of spiders. Many members of this family are also known as flower spiders or flower crab spiders.
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 500 species in thirty genera.
The genus Oxytate, commonly known as grass crab spiders, comprises a homogenous group of nocturnal crab spiders. The complete mitochondrial genome of the type species O. striatipes was determined in 2014.
Coriarachne is a genus of crab spiders that was first described by Tamerlan Thorell in 1870. Over half of described species have been synonymized or moved to similar genera, including Bassaniana, Bassaniodes, and Pycnaxis.
Boliscus is a genus of Asian crab spiders first described by Tamerlan Thorell in 1891. As of February 2019 it contains only three species.
Cymbacha is a genus of crab spiders that was first described by Ludwig Carl Christian Koch in 1874.
Holopelus is a genus of crab spiders that was first described by Eugène Louis Simon in 1886.
Avelis is a monotypic genus of African crab spiders containing the single species, Avelis hystriculus. It was first described by Eugène Louis Simon in 1895, and all identified species were found in the Cape Province of South Africa.
Bassaniodes is a genus of crab spiders that was first described by Reginald Innes Pocock in 1903.
Cetratus is a genus of South Pacific crab spiders that was first described by Władysław Kulczyński in 1911.
Geraesta is a genus of African crab spiders that was first described by Eugène Louis Simon in 1889.
Haplotmarus is a monotypic genus of Asian crab spiders containing the single species, Haplotmarus plumatilis. It was first described by Eugène Louis Simon in 1909, and is found in Vietnam.
Hedana is a genus of crab spiders that was first described by Ludwig Carl Christian Koch in 1874.
Iphoctesis is a monotypic genus of African crab spiders containing the single species, Iphoctesis echinipes. It was first described by Eugène Louis Simon in 1903, and is found on Madagascar.
Stephanopis is a genus of crab spiders first described by Octavius Pickard-Cambridge in 1869. It was erected for five then newly described species, including S. altifrons, from Australia. Stephanopis was characterized by the high cephalic region with unequally sized anterior eyes disposed in a strongly recurved row, opisthosoma ending in several spiniform projections and dorsoventrally depressed habitus. According to Pickard-Cambridge, the single specimen used for the description of S. altifrons was dry-pinned. Therefore the specimen could not be properly examined, so it was not possible to determine if the specimen was adult. Moreover, he states his own sketch of the spider as “hasty”. This may explain why the somatic characters were inadequately described, genitalic features were not mentioned at all, and the illustrations were not detailed enough, making the species unidentifiable.
Tharrhalea is a genus of crab spiders first described in 1875 by Ludwig Carl Christian Koch.
Boomerangiana is a monotypic genus of Australian crab spiders in the tribe Misumenini containing the single species, Boomerangiana dimidiata. They are small white spiders, only 2 to 3 millimetres long, with silvery round abdomen. The species was originally described in 1867 by Ludwig Koch from an immature female found in Brisbane. Though he originally placed it with Xysticus, after several more were found in Rockhampton and Gayndah and more information became available, he moved the species to Diaea. It was moved to its own genus in 2014 named Boomerangia, but was renamed Boomerangiana when it was discovered that the name was already in use for a family of nematodes.
Isala punctata is a species of South Pacific crab spiders. It is the only species in the monotypic genus Isala. It was first described by Ludwig Carl Christian Koch in 1876, and is found in Australia.
Bomis is a genus of crab spiders that was first described by Ludwig Carl Christian Koch in 1874.
Spiracme is a genus of crab spiders erected by Anton Menge in 1876 to contain S. striata, transferred from Xysticus. The exact relationship of these spiders and their closest relatives has been long debated, and many included species have been transferred to and from similar genera, namely Xysticus and Ozyptila. Most recently, Rainer Breitling conducted a DNA barcoding study in 2019 and grouped similar species based on the results:
