Orchestina magna Izquierdo, 2017

Izquierdo, Matías Andrés & Ramírez, Martín J., 2017, Taxonomic Revision Of The Jumping Goblin Spiders Of The Genus Orchestina Simon, 1882, In The Americas (Araneae: Oonopidae), Bulletin of the American Museum of Natural History 2017 (410), pp. 1-1 : 1-

Orchestina magna Izquierdo , new species

Figures 77 , 94A–C , 100H, I , map 10

TYPE: Male holotype from Ecuador: Orellana, Tiputini Biodiversity Station, near Yasuní National Park, 250 m, -0.63194°, -76.14416°, Oct. 24, 1998, T. Erwin et al., deposited in USNM, PBI_OON 37646.

ETYMOLOGY: The specific name refers to the strong development of the chelicerae.

DIAGNOSIS: Males are similar to those of O. ecuatoriensis by the shape of embolus and the spine-shaped apophysis, but in O. magna both structures are longer. Also, this species is easily distinguished by the presence of a laminar projection on the mesal margin of the chelicerae.

MALE (PBI_OON 37646): Total length 1.14. Habitus as in figure 77A, D. CEPHALOTHO- RAX: Carapace with brown stripe along margin of cephalic area (fig. 77E). Clypeus curved slightly downward in front view, vertical in lateral view (fig. 77E). Eyes as in figure 77B. Sternum as long as wide (fig. 77F). Anterior face of chelicerae with basal blunt projections, mesal margin with prominent lamina. Labium rectangular. ABDOMEN: Pale white. LEGS: Yellow; patella plus tibia I longer than carapace. GENITALIA: Palp proximal segments yellow; cymbium yellow; bulb yellow, tapering apically, with strong, spine-shaped apophysis near base of embolus; embolus with notch near base; sperm duct coiled with several loops (figs. 94A–C, 100H, I).

FEMALE: Unknown; females of morphospecies MI020, MI022–MI023, MI025–MI027, MI029, MI036, and MI038 from the same area are candidates to match this male.

DISTRIBUTION: Known only from the type locality in Ecuador (Orellana, map 10).

OTHER MATERIAL EXAMINED: Same data as holotype, Oct. 22, 1998, T. Erwin et al., 13 (USNM, PBI_ OON 37645).

Figures

FIGURE 77. Orchestina magna, male. A, B, D. Habitus. C, E, F. Cephalothorax. A, E. Lateral. B. Anterior; asterisks show conical projection of chelicerae. C. Dorsal. D. Anterolateral. F. Ventral. Arrow in E pointing to sclerotized band of carapace. Scale bars: 0.2 mm. (PBI_OON 37645).

FIGURE 94. Orchestina spp., palps of males. A–C. O . magna. D–F. O . waorani, right palp. A, F. Prolateral. B, E. Dorsal. C, D. Retrolateral. Scale bars: 0.2 mm. (PBI_OON 37646, 37136).

FIGURE 100. Orchestina spp., drawings of male palps. A, B. O . erwini. C–E. O. ecuatoriensis. F, G. O. sotoi. H, I. O. magna. J–L. O . shuar, right palp. M, N. O . waorani. A, F, H, M. Prolateral. J, L. Retrolateral. B, E, G, I, K, N. Dorsal. D. Scheme of sperm duct course. Images J and K have been flopped for consistency. Scale bars: 0.1 mm, except J, 0.25 mm. (PBI_OON 37574, 30516, 42145, 37646, 37650, 30217, 31114).