The family Cyrtaucheniidae, known as wafer-lid trapdoor spiders, are a widespread family of Mygalomorphae spiders.
Dolichothele is a genus of spiders in the family Theraphosidae found in Brazil and Bolivia. It was first described in 1923 by Mello-Leitão.
Nemesiidae, also known as funnel-web trapdoor spiders, is a family of mygalomorph spiders first described by Eugène Simon in 1889, and raised to family status in 1985. Before becoming its own family, it was considered part of "Dipluridae".
Catumiri chicaoi is a species of spider, in the family Theraphosidae. It is endemic to Brazil.
Catumiri is a genus of South American tarantulas that was first described by J. P. L. Guadanucci in 2004. The name is derived from the Tupi "Catumiri", meaning "very small".
Chaco is a genus of spider in the family Nemesiidae.
Lycinus is a genus of spider in the family Pycnothelidae, found in parts of South America.
Stenoterommata is a genus of South American araneomorph spiders in the family Pycnothelidae. It was first described by E. L. Holmberg in 1881. Originally placed with the Ctenizidae, it was transferred to the funnel-web trapdoor spiders in 1985, then to the Pycnothelidae in 2020. It is a senior synonym of Ctenochelus.
Tmesiphantes is a genus of Brazilian tarantulas in the subfamily Theraphosinae that was first described by Eugène Louis Simon in 1892. The genera Magulla and Melloleitaoina were brought into synonymy in 2019.
Fufius is a genus of Central and South American Rhytidicolidae that was first described by Eugène Simon in 1888. Originally placed with the curtain web spiders, it was moved to the Cyrtaucheniidae in 1941 and to Rhytidicolidae in 2022.
Guyruita is a genus of South American tarantulas that was first described by J. P. L. Guadanucci in 2007.
Schismatothele is a genus of South American tarantulas that was first described by Ferdinand Anton Franz Karsch in 1879.
Pycnothele is a genus of South American mygalomorph spiders in the family Pycnothelidae. First described by Ralph Vary Chamberlin in 1917, it was moved to the funnel-web trapdoor spiders in 1985, but moved back to Pycnothelidae in 2020. It is a senior synonym of Agersborgia and Androthelopsis.
Guyruita cerrado is a species of spider in the genus Guyruita. The species has originally been described by José P.L. Guadanucci, Sylvia M. Lucas, Rafael P. Indicatti and Flávio U. Yamamoto.
Yanomamius is a genus of South American tarantulas first erected by Rogério Bertani and M. Q. Almeida in 2021 for two newly discovered species and one previously described species from Brazil. In one of Bertani's prior studies, he investigated a tarantula collected by the Yanomami as a source of food. Based on the limited material available for study- two adult females and one immature spider- the species was placed into Holothele. The next year, it was moved to newly erected genus Guyruita due, in part, to the multi-lobed shape of its spermathecae. When the first male was found and described, the diagnostic characteristics didn't match that of Holothele or Guyruita, so a new genus was erected for Y. waikoshiemi and three other closely related species.
Rhytidicolidae, also known as golden tunnel-web spiders, is a small Neotropical family of mygalomorph spiders first described by Eugène Simon in 1903. It was originally described as a tribe and considered a junior synonym of Aporoptychinae Simon, 1889 by Raven in 1985.
