Gertschiola neuquena, HUBER, 2000

HUBER, BERNHARD A., 2000, New World Pholcid Spiders (Araneae: Pholcidae): A Revision At Generic Level, Bulletin of the American Museum of Natural History 2000 (254), pp. 1-348 : 92-94

Gertschiola neuquena , new species Figures 351 356

TYPE: Male holotype from Confluencia , Neuquén, Argentina ; Feb. 1976 (O. de Ferrariis), in AMNH .

ETYMOLOGY: The species name is an adjective, derived from the Argentinean state Neuquén.

DIAGNOSIS: Distinguished from G. macrostyla by the narrower procursus (compare figs. 346, 353), and the much longer tubular structure in the female internal genitalia (compare figs. 349, 354).

MALE (holotype): Total length 2.0, carapace width 0.9; leg 1: 8.9 (2.3+0.3+ 2.6+2.9+0.8), tibia 2: 2.2, tibia 3: 1.8, tibia 4: 2.3; tibia 1 l/d: 28. Habitus as in G. macrostyla (cf. fig. 342); entire prosoma ochre, only carapace with darker median line; thoracic groove very shallow, eight eyes on slightly elevated ocular area; distance PME- ALE about 35% of PME diameter. Sternum without humps. Chelicerae with frontal humps that are set with modified hairs (figs. 351 352), with stridulatory ridges laterally. Palps ochre to light brown, coxa without re- trolateral apophysis, femur proximally with stridulatory pick (modified hair) on prolateral side, inconspicuous apophysis on retrolateral side, tibia enlarged, procursus simple but long, ribbon-shaped (fig. 353), bulb with distinctive hooked apophysis and larger membranous embolar division (fig. 353). Legs ochre-yellow, no rings visible; without spines, but with some slightly curved hairs on metatarsi 1 and 2, and some vertical hairs on tibiae and metatarsi; retrolateral trichobothrium of tibia 1 at 73%; tarsus 1 with ~ 9 pseudosegments (difficult to see). Opisthosoma globular (rather as illustrated for Ibo- typoranga naideae , cf. fig. 357), greenishochre, covered with many darker spots, except ventrally.

FEMALE (Planicie Banderita): Very similar to male, but without curved hairs on legs. Carapace width 0.9; tibia 1: 1.9. Epigynum as in fig. 356; internal genitalia with long tubular structure (figs. 354 355).

VARIATION: Measurements of male from Planicie Banderita: carapace width 1.0; tibia 1: 3.5. Tibia 1 in the females from Loma de la Lata: 1.9, 2.1.

DISTRIBUTION: Known only from Neuquén, Argentina.

MATERIAL EXAMINED: ARGENTINA: Neuquén: Confluencia: type above. Planicie Banderita: Feb. 1, 1976 (Coscarón), 13 1♀ in AMNH. Loma de la Lata, Jan. 1, 1973 (O. de Ferrariis), 2♀ 1 juvenile in AMNH. Loma de la Lata, Confluencia, Nov. 26, 1972 (O. de Ferrariis), 1 penultimate male in AMNH.

Figures

Figs. 351 356. Gertschiola neuquena, n. sp. 351. Male chelicerae, frontal view. 352. Modified hair on male chelicera. 353. Left male palp, retrolateral view. 354. Epigynum, dorsal view (arrow points to possible pore plate). 355. Schematic representation of course of duct in female internal genitalia. 356. Epigynum, ventral view. Scale lines: 0.2 mm (351, 353 354, 356), 0.05 mm (352).