Costarina osa, Platnick & Berniker & Víquez, 2014

Platnick, Norman I., Berniker, Lily & Víquez, Carlos, 2014, The Goblin Spider Genus Costarina (Araneae, Oonopidae), Part 2: the Costa Rican fauna, American Museum Novitates 2014 (3794), pp. 1-76 : 75

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).

Figures

FIGURES 549–559. Costarina osa, new species, male (549–554) and female (555–559). 549. Left palp, prolateral view. 550. Same, ventral view. 551. Same, retrolateral view. 552. Left embolus, prolateral view. 553. Same, ventral view. 554. Same, retrolateral view. 555. Sternum, ventral view. 556. Abdomen, lateral view. 557. Same, ventral view. 558. Digested female genitalia, ventral view. 559. Same, dorsal view.