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.
Misumena is a genus of crab spiders sometimes referred to as flower crab spiders. They are similar in appearance to several other genera in the family Thomisidae, such as Misumenoides and Mecaphesa.
Xysticus is a genus of ground crab spiders described by C. L. Koch in 1835, belonging to the order Araneae, family Thomisidae. The genus name is derived from the Ancient Greek root xyst, meaning "scraped, scraper".
Thanatus is a genus of false crab spiders described by Carl Ludwig Koch in 1837, belonging to the order Araneae, family Philodromidae.
Cheiracanthium, commonly called yellow sac spiders, is a genus of araneomorph spiders in the family Cheiracanthiidae, and was first described by Carl Ludwig Koch in 1839. They are usually pale in colour, and have an abdomen that can range from yellow to beige. Both sexes range in size from 5 to 10 millimetres. They are unique among common house spiders because their tarsi do not point either outward, like members of Tegenaria, or inward, like members of Araneus, making them easier to identify.
Drassodes is a genus of ground spiders that was first described by Niklas Westring in 1851. They are brown, gray, and red spiders that live under rocks or bark in mostly dry habitats, and are generally 3.8 to 11.6 millimetres long, but can reach up to 20 millimetres (0.79 in) in length.
The genus name is a combination of the Ancient Greek "argyros" (άργυρος), meaning "silver", and the suffix "-odes", meaning "like".
Pistius is a genus of crab spiders with nine described species. Most occur in Asia, only P. truncatus has a palaearctic distribution.
Runcinia is a genus of crab spiders that was first described by Eugène Louis Simon in 1875. The former R. elongata is a synonym of Thomisus elongatus.
Tmarus is a genus of crab spiders, comprising 227 species:
Thomisus is a genus of crab spiders with around 142 species described. The genus includes species that vary widely in their ecology, with some that are ambush predators that feed on insects visiting flowers. Like several other genera in the family Thomisidae, they are sometimes referred to as flower crab spiders, from their crab-like motion and their way of holding their front legs, reminiscent of a crab spreading its claws as a threat.
Tibellus is a genus of slender crab spiders described by Simon in 1875, belonging to the order Araneae, family Philodromidae. Species of this genus are present in Eurasia, Africa, Americas and Australia.
Synema is a genus of spider in the family Thomisidae, found in most parts of the world.
Epidius is a genus of crab spiders that was first described by Tamerlan Thorell in 1877. It is a senior synonym of Pothaeus.
Angaeus is a genus of Asian crab spiders first described by Tamerlan Thorell in 1881. It is considered a senior synonym of Paraborboropactus.
Ebrechtella is a genus of crab spiders that was first described by Friedrich Dahl in 1907.
Massuria is a genus of spiders in the family Thomisidae. It was first described in 1887 by Tamerlan Thorell. As of 2017, it contains 8 Asian species.
Pharta is a genus of crab spiders, family Thomisidae, first described by Tamerlan Thorell in 1891.
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:
