The Goblin Spider Genus Costarina (Araneae, Oonopidae), Part 2: the Costa Rican fauna Author Platnick, Norman I. Author Berniker, Lily Author Víquez, Carlos text American Museum Novitates 2014 2014-01-06 2014 3794 1 76 http://www.bioone.org/doi/abs/10.1206/3794.1 journal article 10.1206/3794.1 0003-0082 5365505 Costarina osa , new species ( Figures 549–559 ) TYPE: Male holotype from lowland forest litter taken at an elevation of 250 m at Cerro Helado , 17 km northeast of Rincón , Península de Osa , 8°45′30″N , 83°25′00″W , Puntarenas , Costa Rica ( June 21, 1997 ; R. Anderson ), deposited in INBIO (PBI_OON 29776) . DIAGNOSIS: Males resemble those of C. nara (cf. figs. 177–187), but have a broader, distally bent tip on the distal embolar prong (figs. 549–554); females have fully fused ventral scuta, a tiny genital atrium, and heavily sclerotized apodemes (figs. 556–559). MALE (PBI_OON 29776, figs. 549–554): Total length 1.83. Both processes on endite elongated, dorsal process directed anteriorly. Femur I r0-1-0. Embolus proximal prong with retrolaterally directed knob at base; distal prong sharply bent distally ( N = 1). FEMALE (PBI_OON 51307, figs. 555–559): Total length 2.21. Spination typical. Genital atrium oval, filled with protruding sclerotization, anterior, posterior margins both rebordered ( N = 4). DISTRIBUTION: Southern Puntarenas (known only from the Osa Peninsula).