Chrosiothes is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1894. It is considered a senior synonym of Theridiotis.
They have thick legs and two minute setae in place of a colulus. Males are noticeably smaller than females. Females of C. jamaicensis are about long, while males are only about .
They are closely related to members of Episinus, Spintharus, Thwaitesia and Anelosimus.
Species it contains twenty-seven species that occurs almost exclusively in the New World from the United States to Brazil, with one species found in China, Korea and Japan, and two species endemic to Taiwan. It also contains 7 extinct species, all found in Dominican ambers: Chrosiothes carajaensis Puchulú-Figueiredo, Santanna & Rodrigues, 2017 – Brazil Chrosiothes chirica (Levi, 1954) – USA, Mexico Chrosiothes cicuta Puchulú-Figueiredo, Santanna & Rodrigues, 2017 – Brazil Chrosiothes decorus Puchulú-Figueiredo, Santanna & Rodrigues, 2017 – Brazil Chrosiothes diabolicus Puchulú-Figueiredo, Santanna & Rodrigues, 2017 – Brazil Chrosiothes episinoides (Levi, 1963) – Chile Chrosiothes fulvus Yoshida, Tso & Severinghaus, 2000 – Taiwan Chrosiothes goodnightorum (Levi, 1954) – Mexico to Costa Rica Chrosiothes iviei Levi, 1964 – USA Chrosiothes jamaicensis Levi, 1964 – Jamaica, Dominican Rep. Chrosiothes jenningsi Piel, 1995 – USA Chrosiothes jocosus (Gertsch & Davis, 1936) – USA, Mexico Chrosiothes litus Levi, 1964 – Mexico Chrosiothes minusculus (Gertsch, 1936) – USA, Mexico Chrosiothes murici Puchulú-Figueiredo, Santanna & Rodrigues, 2017 – Brazil Chrosiothes niteroi Levi, 1964 – Bolivia, Brazil, Argentina Chrosiothes perfidus Marques & Buckup, 1997 – Brazil Chrosiothes portalensis Levi, 1964 – USA, Mexico Chrosiothes proximus (O. Pickard-Cambridge, 1899) – Mexico to Panama Chrosiothes silvaticus Simon, 1894 (type) – USA to Ecuador Chrosiothes sudabides (Bösenberg & Strand, 1906) – China, Korea, Japan Chrosiothes taiwan Yoshida, Tso & Severinghaus, 2000 – Taiwan Chrosiothes tonala (Levi, 1954) – Mexico to Honduras Chrosiothes una Puchulú-Figueiredo, Santanna & Rodrigues, 2017 – Brazil Chrosiothes valmonti (Simon, 1898) – St. Vincent Chrosiothes venturosus Marques & Buckup, 1997 – Brazil Chrosiothes wagneri (Levi, 1954) – Mexico †Chrosiothes biconigerus (Wunderlich, 1988) – Dominican Amber – Miocene †Chrosiothes curvispinosus (Wunderlich, 1988) – Dominican Amber – Miocene †Chrosiothes emulgatus (Wunderlich, 1988) – Dominican Amber – Miocene †Chrosiothes longispinosus (Wunderlich, 1988) – Dominican Amber – Miocene †Chrosiothes monoceros (Wunderlich, 1988) – Dominican Amber – Miocene †Chrosiothes tumulus (Wunderlich, 1988) – Dominican Amber – Miocene †Chrosiothes unicornis (Wunderlich, 1988) – Dominican Amber – Miocene
Formerly included: C. australis (Simon, 1896) (Transferred to Episinus)
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