Orchestina nahuelbuta 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 nahuelbuta Izquierdo , new species

Figures 164E , 167D–F , 169D , 171D , 173F , 174G , 176D , map 30

TYPES: Female holotype from Chile: Región de La Araucanía (IX): Provincia de Malleco: P.N. Nahuelbuta, Pichinahuel exit, fogging in Arau- caria araucana, 1182 m, -37.80473°, -73.03520°, Dec. 06, 2001, E. Arias et al., deposited in CAS 9023354, PBI_OON 2304 ; same data, 1 male and 1 female paratypes deposited in CAS 9023362, PBI_OON 2308 ; same data, Nov. 22, 2004, J.E. Barriga, 1 male paratype deposited in CAS 9023360, PBI_OON 2309 .

ETYMOLOGY: The specific name is a noun in apposition taken from the type locality.

DIAGNOSIS: Males are very similar to those of O. granizo , O. curico , O. jaiba , and O. quenies in the shape of copulatory bulb. They can be distinguished from those of O. curico by the shape of endites, slightly more pointed than those of that species (compare fig. 164E), and from other species by subtle differences in the course of the sperm duct and the shape of labium and endites. Females can be distinguished by the shape of the paired epigastric ridges, placed near median region, by the position of the external pockets, just below the level of the anterior apodemes of the anterior receptaculum, the more convex sclerotized margin of the epigastric area, and by the lumen of the anterior receptaculum with two chambers (figs. 169D, 171D, 176D).

MALE (PBI_OON 2309): Total length 1.09.

CEPHALOTHORAX: Labium nearly pentagonal, slightly swollen. Endites convergent, thin (fig. 164E). LEGS: Missing. GENITALIA: Bulb with no apophyses; embolus long; sperm duct slightly coiled (figs. 167D–F, 173F, 174G).

FEMALE (PBI_OON 2304): Total length 1.10.

CEPHALOTHORAX: Labium rectangular.

ABDOMEN: Separated from prosoma, ovoid, dorsum with purple bands. LEGS: Only left leg II present. GENITALIA: Epigastric region with external pockets almost over anterior apodemes (in transparency), epigastric ridges highly convex, near median region; anterior receptaculum with lumen formed by two chambers, anterior apodemes long, directed forward; posterior receptaculum absent, posterior apodeme formed by entire plate (figs. 169D, 171D, 176D).

DISTRIBUTION: Known only from the type locality in Chile (Malleco, map 30).

OTHER MATERIAL EXAMINED: Only one juvenile in the same vial as the holotype.

Figures

FIGURE 164. Orchestina spp., comparison of endites and labium of males. A. O . cachai. B. O . jaiba. C. O . pandeazucar. D. O . granizo. E. O . nahuelbuta. F. O . curico. G. O . quenies. Arrows point to the modification of endites. Scale bars: 0.2 mm. (PBI_OON 42203, 42186, 10557, 2309, 14871, 42335).

FIGURE 167. Orchestina spp., right male palps. A–C. O . jaiba. D–F. O . nahuelbuta. A, D. Prolateral. B, E. Dorsal. C, F. Retrolateral. Images flopped for consistency. Scale bars: 0.2 mm. (PBI_OON 15058, 2308).

FIGURE 169. Orchestina spp., female genitalia, ventral view. A. O . jaiba. B. O . osorno, holotype. C. O . curico, paratype. D. O . nahuelbuta, holotype. Abbreviation: SM, sclerotized margins in the epigastric area. Arrows point to the external pockets; asterisks show the sclerotized ridges in the epigastric fold area. Scale bars: 0.2 mm. (PBI_OON 42251, 51091, 2311, 2304).

FIGURE 171. Orchestina spp., cleared female genitalia, ventral view. A. O . jaiba, paratype. B. O. osorno, holotype. C. O . curico, paratype. D. O . nahuelbuta, holotype. Scale bars: 0.2 mm. (PBI_OON 14808, 51091, 2311, 2304).

FIGURE 173. Orchestina spp., drawing of male palps. A. O . pandeazucar, paratype. B. O . cachai. C. O . pizarroi, holotype. D. O . granizo, holotype. E. O . jaiba, paratype, right palp. F. O . nahuelbuta, paratype, right palp. G. O . curico, holotype. H. O . quenies, paratype. I. O . caleta, holotype. Images E and F flopped for consistency. Scale bars: 0.1 mm. (PBI_OON 42184, 14826, 10557, 15058, 2308, 14871, 42335, 42182).

FIGURE 174. Orchestina spp., drawings of male palps, dorsal view. A. O . pandeazucar. B. O . cachai. C. O . granizo, holotype. D. O . jaiba, paratype. E. O . curico. F. O . quenies, paratype. G. O . nahuelbuta, right palp. H. O . caleta, holotype. I. O . pizarroi, holotype. Images D and G flopped for consistency. Scale bars: 0.1 mm. (PBI_OON 42184, 14876, 10557, 15058, 14871, 42335, 2308, 42182, 42238).

FIGURE 176. Orchestina spp., drawings of female genitalia, ventral view. A. O . jaiba, paratype. B. O. osorno, holotype. C. O . curico, paratype. D. O . nahuelbuta, holotype (PBI_OON 2304). E. O . quenies. Arrows point to external pockets, asterisks to epigastric ridges. Scale bars: 0.1 mm. (PBI_OON 14808, 51091, 2311, 1946).