Tarsal Organ Morphology and the Phylogeny of Goblin Spiders (Araneae, Oonopidae), With Notes on Basal Genera

NORMAN I. PLATNICK; NAIARA ABRAHIM; FERNANDO ÁLVAREZ-PADILLA; DANIELA ANDRIAMALALA; BARBARA C. BAEHR; LÉON BAERT; ALEXANDRE B. BONALDO; ANTONIO D. BRESCOVIT; NATALIA CHOUSOU-POLYDOURI; NADINE DUPÉRRÉ; BEATA EICHENBERGER; WOUTER FANNES; EVA GAUBLOMME; ROSEMARY G. GILLESPIE; CRISTIAN J. GRISMADO; CHARLES E. GRISWOLD; MARK S. HARVEY; ARNAUD HENRARD; GUSTAVO HORMIGA; MATIAS A. IZQUIERDO; RUDY JOCQUÉ; YVONNE KRANZBALTENSPERGER; CHRISTIAN KROPF; RICARDO OTT; MARTÍN J. RAMÍREZ; ROBERT J. RAVEN; CRISTINA A. RHEIMS; GUSTAVO R.S. RUIZ; ADALBERTO J. SANTOS; ALMA SAUCEDO; PETRA SIERWALD; TAMÁS SZÜTS; DARRELL UBICK; XIN-PING WANG

AMER MUSEUM NATURAL HISTORY

Lugar: New York; Año: 2012 p. 1 - 1

ased on a survey of a wide variety of oonopid genera and outgroups, we hypothesize new synapomorphies uniting the Oonopidae (minus the South African genus Calculus Purcell, which is transferred to the Orsolobidae). The groundplan of the tarsal organ in Oonopidae is hypothesized to be an exposed organ with a distinctive, longitudinal ridge originating from the proximal end of the organ, and a serially dimorphic pattern of 4-4-3-3 raised receptors on legs I?IV, respectively. Such organs typify the diverse, basal, and ancient genus Orchestina Simon. Several other genera whose members resemble Orchestina in retaining two plesiomorphic features (an H-shaped, transverse eye arrangement and a heavily sclerotized, thick-walled sperm duct within the male palp) are united by having tarsal organs that are partly (in the case of Cortestina Knoflach) or fully capsulate (in the case of Sulsula Simon, Xiombarg Brignoli, and Unicorn Platnick and Brescovit). The remaining oonopids are united by the l