Acanthogonatus is a genus of South American mygalomorph spiders in the family Pycnothelidae. It was first described by Ferdinand Anton Franz Karsch in 1880. Originally placed with the brushed trapdoor spiders, it was transferred to the funnel-web trapdoor spiders in 1985, then to the Pycnothelidae in 2020. Species it contains twenty-nine species, found in Uruguay, Peru, Brazil, Argentina, and Chile: Acanthogonatus alegre Goloboff, 1995 – Chile Acanthogonatus birabeni Goloboff, 1995 – Argentina Acanthogonatus brunneus (Nicolet, 1849) – Chile Acanthogonatus campanae (Legendre & Calderón, 1984) – Chile Acanthogonatus centralis Goloboff, 1995 – Argentina Acanthogonatus chilechico Goloboff, 1995 – Chile Acanthogonatus confusus Goloboff, 1995 – Chile, Argentina Acanthogonatus ericae Indicatti, Lucas, Ott & Brescovit, 2008 – Brazil Acanthogonatus francki Karsch, 1880 (type) – Chile Acanthogonatus fuegianus (Simon, 1902) – Chile, Argentina Acanthogonatus hualpen Goloboff, 1995 – Chile Acanthogonatus huaquen Goloboff, 1995 – Chile Acanthogonatus incursus (Chamberlin, 1916) – Peru Acanthogonatus juncal Goloboff, 1995 – Chile Acanthogonatus minimus Indicatti, Folly-Ramos, Vargas, Lucas & Brescovit, 2015 – Brazil Acanthogonatus mulchen Goloboff, 1995 – Chile Acanthogonatus nahuelbuta Goloboff, 1995 – Chile Acanthogonatus notatus (Mello-Leitão, 1940) – Argentina Acanthogonatus parana Goloboff, 1995 – Argentina Acanthogonatus patagallina Goloboff, 1995 – Chile Acanthogonatus patagonicus (Simon, 1905) – Chile, Argentina Acanthogonatus peniasco Goloboff, 1995 – Chile Acanthogonatus pissii (Simon, 1889) – Chile Acanthogonatus quilocura Goloboff, 1995 – Chile Acanthogonatus recinto Goloboff, 1995 – Chile Acanthogonatus subcalpeianus (Nicolet, 1849) – Chile Acanthogonatus tacuariensis (Pérez-Miles & Capocasale, 1982) – Brazil, Uruguay Acanthogonatus tolhuaca Goloboff, 1995 – Chile Acanthogonatus vilches Goloboff, 1995 – Chile Formerly included: A. argentina (Simon, 1897) (Transferred to Stenoterommata) Nomen dubium A. gounellei (Simon, 1886 See also List of Pycnothelidae species References Further reading Mygalomorphae genera Pycnothelidae Spiders of South America