Scaphiella osa, Platnick & Dupérré N., 2010

Platnick, N. & Dupérré N., 2010, The Goblin Spider Genus Scaphiella (Araneae, Oonopidae), Bulletin of the American Museum of Natural History 2010 (332), pp. 1-156 : 33-35

Scaphiella osa , new species Figures 279–297; map 4

TYPES: Male holotype and female allotype taken in litter at Estación Agujas, Península de Osa, Puntarenas, Costa Rica (Aug. 4–14, 2000; A. Azofeifa), deposited in INBIO ( PBI _OON 26358) .

DIAGNOSIS: Both sexes resemble those of S. virgen in having deep sternal furrows (fig. 280); males also resemble those of S. virgen in having a somewhat enlarged palpal femur but lack the anterior spine on the endites and have the embolus originating more distally on the palpal bulb (fig. 287); females have a much smaller anterior epigynal sclerite, with distinct anterior and posterior portions (figs. 295–297).

MALE (PBI_OON 26358, figs. 279–288). Total length 1.17. Carapace smooth. Sternum smooth. Endites without anteromedian modifications. Abdomen unpatterned, scuta smooth. Palpal femur moderately expanded; embolus originating at about half of tarsal length.

FEMALE (PBI_OON 26358, figs. 289–297). Total length 1.35. Anterior epigynal sclerite greatly widened posteriorly; apodemes anterolaterally directed.

OTHER MATERIAL EXAMINED: COSTA RICA: Puntarenas: Estación La Leonn, Sendero Río Madrigal, Península de Osa , Dec. 12–27, 2001, litter (A. Azofeifa, AMNH PBI _OON 26357), 1 -; Fundacion Neotropica Rincón Osa, Península de Osa , June 2001 (R. Anderson, C. Víquez, INBIO 78664 , PBI _OON 26361), 1 -; Rancho Quemado, Península de Osa , Mar. 1972 (F. Avesa, INBIO 45746 , PBO _OON 26363), 1 -, Sept. 1992 (F. Quesada, AMNH PBI _OON 26360), 1 U ; 5 km W Rincon de Osa, Península de Osa , 8u429N, 83u319W, Mar. 24, 1973, high ridge, Berlese of buttress litter, elev. 50 m (J. Wagner, J. Kethley, FMNH 34963 , PBI _OON 10634), 1 -, same, log, bark, root mat ( FMNH PBI _OON 37501), 1 U, same, leaf mold and chunks of laminate fungus ( FMNH PBI _ OON 306 ), 1 -, same, mixed litter at base of tree in primary forest ( FMNH PBI _ OON 307 ), 2 U, Mar. 25, 1973, Berlese, leaf litter (J. Wagner, J. Kethley, FMNH PBI _ OON 308 ), 1 -; Sirena, Península de Osa , May 18–30, 2001 (A. Azofeifa, AMNH PBI _OON 26365), 1 -.

DISTRIBUTION: Known only from the Osa peninsula, Puntarenas, Costa Rica (map 4).