Sidymella Strand, 1942

Machado, Miguel & Teixeira, Renato Augusto, 2021, Phylogenetic relationships in Stephanopinae: systematics of Stephanopis and Sidymella based on morphological characters (Araneae: Thomisidae), Organisms Diversity & Evolution (New York, N. Y.) 21 (2), pp. 281-313 : 296

Sidymella Strand, 1942

Type species: Sidymella lucida (Keyserling, 1880)

Diagnosis. The component species of Sidymella (stricto sensu) can be distinguished from other thomisids by the presence of stout spines on the mesial surface of femur I and macrosetae above their ALE. Males are diagnosed by their long and laminar embolus with well-developed pars pendulum curving at their terminal portion. Unlike other stephanopines, which have smooth-surfaced RTAs or with parallel creases on it, males of Sidymella present a rounded RTA with nodose texture and truncated short RTAvbr; a prominent trichobotrium can be observed on the dorsum of the palpal tibia. Females differ from those of other genera by their coiled copulatory ducts leading to a pair of walnut-shaped spermathecae internally compartmentalized in small chambers.

Composition. The genus Sidymella (stricto sensu) is composed of six valid species with distribution range restricted to the Neotropical region: Sidymella lucida (Keyserling, 1880) ; Sidymella excavata Machado & Guzati, 2019 ; Sidymella furcillata (Keyserling, 1880) ; Sidymella longispina (Mello-Leitão, 1943) ; Sidymella marmorata Machado & Guzati, 2019 and Sidymella kolpogaster ( Lise, 1973) .

Note. Other valid species that are currently described in Sidymella that were not listed above will be properly addressed in future taxonomic works where new genera will be officially proposed.