Friday, January 31, 2020

[Arachnida • 2019] A Taxonomic Review of the Crab Spider Genus Sidymella (Araneae, Thomisidae) in the Neotropics


Sidymella lucida (Keyserling, 1880)

in Machado, Guzati, Viecelli, et al., 2019. 
Photo: Diego Galarraga Sugoniaev

Abstract
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).

Key Words: crab spiders, morphology, new records, Stephanopinae, Stephanopis

Figure 1. a–d Diagnostic sexual features of Sidymella a Detail of the nodose RTA surface on male palp b Tibial trichobothria on male palp (indicated by an arrow) c Glandular head on spermatheca d Walnut-shaped spermatheca
e, f Photos of live specimens of Sidymella lucida. Photo credits: e Diego Galarraga Sugoniaev; f Damián Hagopián.




Sidymella lucida (Keyserling, 1880)


 Miguel Machado, Catherine Guzati, Rafaela Viecelli, Diana Molina-Gómez and Renato Augusto Teixeira. 2019. A Taxonomic Review of the Crab Spider Genus Sidymella (Araneae, Thomisidae) in the Neotropics. Zoosystematics and Evolution. 95(2): 319-344. DOI: 10.3897/zse.95.34958