title: First Harvestman Record for the Juan Fernández Archipelago, Chile, with Morphological Notes on Acropsopilio chilensis (Opiliones: Caddidae: Acroposopilioninae).
abstract: Acropsopilio chilensis Silvestri, 1904 (Eupnoi: Caddidae: Acropsopilioninae), is recorded for Robinson Crusoe Island, Chile. This is the first harvestman species recorded for the Juan Fernández Archipelago and also the first extra-continental record for this species. During the comparison with continental co-specific specimens, some previously unknown, remarkable morphological characteristics were discovered, among them: the absence of ovipositor seminal receptacles and tracheal system, small and probably imperforate spiracles and the presence of a subdistal spiny structure, maybe a stylus, in the major branch of the penis.
authors.affiliation: División Aracnología, Museo Argentino de Ciencias Naturales - CONICET, Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina; Email: abelaracno@gmail.com.
authors.forename: Abel
authors.initials: A
authors.lastname: Pérez-González
authors.affiliation: División Aracnología, Museo Argentino de Ciencias Naturales - CONICET, Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina; Email: unknown.
authors.forename: Martín J
authors.initials: MJ
authors.lastname: Ramírez
authors.affiliation: Departamento de Ecología, Genética y Evolución, IEGEBA (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, C1428EHA, Buenos Aires, Argentina; Email: unknown.
authors.forename: Eduardo M
authors.initials: EM
authors.lastname: Soto
authors.affiliation: Laboratorio de Entomología Ecológica, Departamento de Biología, Facultad de Ciencias, Universidad de La Serena, Casilla 599, La Serena, Chile; Email: unknown.
authors.forename: Jaime
authors.initials: J
authors.lastname: Pizarro-Araya
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001097:Arachnida / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D049628:Body Size; D002677:Chile; D017753:Ecosystem; D005260:Female; D062312:Islands; D008297:Male; D009929:Organ Size