Three new species of Cryptachaea Archer, 1946 are described and illustrated based on males and females: Cryptachaea brescoviti sp. nov. from Beni, Bolivia and Bahia and Espírito Santo, Brazil; C. bonaldoi sp. nov. from Minas Gerais, Mato Grosso do Sul and Paraná and C. lisei sp. nov. from São Paulo and Rio Grande do Sul, Brazil. New synonymies proposed: Chrysso ribeirao Levi, 1962 and C. caraca Levi, 1962 with Chrysso arops Levi, 1962; Cryptachaea diamantina (Levi, 1963) with C. hirta (Taczanowski, 1873) and Cryptachaea maxima (Keyserling, 1884) with C. altiventer (Keyserling, 1884). Theridion altum Levi, 1963 is considered as a new synonym of Theridion soaresi Levi, 1963. Theridion melanosternum Mello-Leitão, 1947 is synonymized with Oedothorax bisignatus Mello-Leitão, 1944 and this species is removed from the synonymy with Theridion calcynatum Holmberg, 1876 and transferred to Theridion Walckenaer, 1805. Theridion tungurahua Levi, 1963 is the female of Theridion fungosum Keyserling, 1884 and the species is transferred to Exalbidion Wunderlich, 1995. Theridion antron Levi, 1963 is the female of Theridion filum Levi, 1963. Theridion nesticum Levi, 1963 is newly synonymized with Theridion teresae Levi, 1963. Theridion olaup Levi, 1963 is transferred to Kochiura Archer, 1950 and the female is described and illustrated for the first time. New combinations established: Cryptachaea dalana (Buckup & Marques, 1991), C. triguttata (Keyserling, 1891), C. dea (Buckup & Marques, 2006), C. digitus (Buckup & Marques, 2006), C. taim (Buckup & Marques, 2006) and Parasteatoda nigrovittata (Keyserling, 1884), all transferred from Achaearanea Strand, 1929. Cryptachaea rafaeli (Buckup & Marques, 1991) is transferred to Henziectypus Archer, 1946.
Spiders; taxonomy; Neotropical Region; new combinations; synonymies
