Monotypic Thomisidae genera

Metadiaea is a genus of spiders in the family Thomisidae. It was first described in 1929 by Mello-Leitão. , it contains only one species, Metadiaea fidelis, from Brazil.

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.

Heriaesynaema is a monotypic genus of African crab spiders containing the single species, Heriaesynaema flavipes. It was first described by Lodovico di Caporiacco in 1939, and is found in Ethiopia.

Lampertia is a genus of spiders in the family Thomisidae. It was first described in 1907 by Strand. , it contains only one species, Lampertia pulchra, found in Madagascar.

Narcaeus is a genus of spiders in the family Thomisidae. It was first described in 1890 by Tamerlan Thorell. , it contains only one species, Narcaeus picinus, found on Java.

Hexommulocymus is a monotypic genus of South American crab spiders containing the single species, Hexommulocymus kolosvaryi. It was first described by Lodovico di Caporiacco in 1955, and is found in Venezuela.

Cymbachina is a monotypic genus of South Pacific crab spiders containing the single species, Cymbachina albobrunnea, found on the South Island of New Zealand. The species was first described in 1893 by A. T. Urquhart under the name Xysticus albo-brunnea. As classification became more focused on physical structure rather than colour patterns or teeth on tarsal claws, this species was re-examined in 1933 and placed into its own genus.

Pseudamyciaea is a genus of spiders in the family Thomisidae. It was first described in 1905 by Simon. , it contains only one species, Pseudamyciaea fuscicauda, found in Java.

Indosmodicinus is a monotypic genus of Asian crab spiders containing the single species, Indosmodicinus bengalensis. It was first described by S. Sen, S. Saha & D. Raychaudhuri in 2010, and is found in China and India.

Bonapruncinia is a monotypic genus of Atlantic crab spiders containing the single species, Bonapruncinia sanctaehelenae. It was first described by P. L. G. Benoit in 1977, and is found on Saint Helena.

Plastonomus is a genus of spiders in the family Thomisidae. It was first described in 1903 by Simon. , it contains only one species, Plastonomus octoguttatus, found in Madagascar.

Corynethrix is a monotypic genus of South Pacific crab spiders containing the single species, Corynethrix obscura. It was first described by Ludwig Carl Christian Koch in 1876 based on a female specimen. They have been found in New South Wales and Queensland. A male has not yet been identified, and there is very little known about the biology and behaviour of this species and its relatives.

Latifrons is a genus of spiders in the family Thomisidae. It was first described in 1911 by Władysław Kulczyński. , it contains only one species, Latifrons picta, of New Guinea.

Dimizonops is a monotypic genus of Asian crab spiders containing the single species, Dimizonops insularis. It was first described by Reginald Innes Pocock in 1903, and is found on Socotra.

Carcinarachne is a monotypic genus of South American crab spiders containing the single species, Carcinarachne brocki. It was first described by Günter E. W. Schmidt in 1956, and has only been found in Ecuador.

Micromisumenops is a genus of spiders in the family Thomisidae. It was first described in 2010 by Tang & Li. , it contains only one Chinese species, Micromisumenops xiushanensis.

Heterogriffus is a monotypic genus of African crab spiders containing the single species, Heterogriffus berlandi. It was first described by Norman I. Platnick in 1976, and is found in Africa.

Herbessus is a monotypic genus of African crab spiders containing the single species, Herbessus decorsei. It was first described by Eugène Louis Simon in 1903, and is found on Madagascar.

Haedanula is a monotypic genus of African crab spiders containing the single species, Haedanula subinermis. It was first described by Lodovico di Caporiacco in 1941, and is found in Ethiopia.