title: Revalidation of the spider genus Citharoceps Chamberlin, 1924 (Araneae, Segestriidae).
abstract: Citharoceps Chamberlin was diagnosed by the presence of a very distinctive stridulatory apparatus composed of two patches of ridges on the sides of the cephalic region, and a stridulatory thorn on the prolateral region of the femur I. Currently, this genus is a junior synonym of Ariadna Audouin, with the assumption that the stridulatory apparatus could constitute an exclusive feature of its unique known species, Citharocepsfidicina Chamberlin, currently senior synonym of Citharocepscalifornica Chamberlin & Ivie. In the present study, Citharoceps is revalidated and redescribed based on the occurrence of the stridulatory apparatus in Citharocepsfidicina and Segestriacruzana Chamberlin & Ivie, and also on the presence of distinguishable characters, such as the length of the labium-sternum junction, ventral median spine on male metatarsi I, and strong sclerotized interpulmonary fold in females, forming a conspicuous median flap. Segestriacruzana is transfered to Citharoceps, with Citharocepscalifornica removed from the synonym of Citharocepsfidicina, and proposed as a junior synonym of Citharocepscruzana, due to the similarity between the additional material examined and the original description. Males of Citharocepsfidicina and Citharocepscruzana are described for the first time.
authors.affiliation: Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, travessa 14, 321, 05508-090, São Paulo, São Paulo, Brazil ; Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brazil, 1500, 05503-090, São Paulo, São Paulo, Brazil.
authors.forename: André Marsola
authors.initials: AM
authors.lastname: Giroti
authors.affiliation: Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brazil, 1500, 05503-090, São Paulo, São Paulo, Brazil.
authors.forename: Antonio Domingos
authors.initials: AD
authors.lastname: Brescovit
keywords: California; Dysderoidea; Haplogynae; Synspermiata; Taxonomy; stridulatory apparatus