Arachosia is a genus of anyphaenid sac spiders that was first described by Octavius Pickard-Cambridge in 1882.
Species it contains twenty-one species, found in the Americas, including the Greater Antilles: Arachosia albiventris Mello-Leitão, 1922 – Brazil, Argentina Arachosia anyphaenoides O. Pickard-Cambridge, 1882 (type) – Brazil Arachosia arachosia Mello-Leitão, 1922 – Venezuela, Brazil Arachosia avalosi Rubio & Ramírez, 2015 – Brazil, Argentina Arachosia bergi (Simon, 1880) – Brazil, Uruguay, Argentina Arachosia bifasciata (Mello-Leitão, 1922) – Brazil, Argentina Arachosia carancho Rubio & Ramírez, 2015 – Argentina Arachosia cubana (Banks, 1909) – USA, Cuba Arachosia freiburgensis Keyserling, 1891 – Brazil, Argentina Arachosia honesta Keyserling, 1891 – Brazil, Argentina Arachosia kapiipeoi Rubio & Ramírez, 2015 – Venezuela, Brazil, Ecuador, Peru, Bolivia, Chile, Argentina Arachosia magna Rubio & Ramírez, 2015 – Brazil, Argentina Arachosia minensis (Mello-Leitão, 1926) – Brazil, Argentina Arachosia monserrate Rubio & Ramírez, 2015 – Colombia Arachosia oblonga (Keyserling, 1878) – Mexico Arachosia pinhalito Rubio & Ramírez, 2015 – Argentina Arachosia praesignis (Keyserling, 1891) – Brazil, Argentina Arachosia proseni (Mello-Leitão, 1944) – Brazil, Argentina, Uruguay Arachosia puta O. Pickard-Cambridge, 1892 – Panama, Brazil Arachosia striata (Keyserling, 1891) – Brazil Arachosia tungurahua Rubio & Ramírez, 2015 – Ecuador
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