A taxonomic review of the crab spider genus Sidymella (Araneae, Thomisidae) in the Neotropics

Four Neotropical species of Sidymella Strand, 1942, S. furcillata Keyserling, 1880, S. longispina (Mello-Leitão, 1943), S. lucida (Keyserling, 1880), and S. kolpogaster (Lise, 1973) are redescribed from both sexes. The holotype of S. nigripes (Mello-Leitão, 1947) is lost and this taxon is considered a species inquierenda. Sidymella obscura (Mello-Leitão, 1929), S. parallela (Mello-Leitão, 1929), and S. spinifera (Mello-Leitão, 1929) are all nomina dubia. Two new species are described: Sidymella excavata sp. nov. (males and females) and S. marmorata sp. nov. (female)