Austrochilus parwis Wunderlich 2017, sp. n.
Creators: name: Wunderlich, Joerg
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Austrochilidae
Austrochilus
Austrochilus parwis

description: Austrochilus parwis sp. n.
(Figs 1–13)
Type material. Male holotype and three female paratypes from Chile, Region IX (Araucanía), west of Angol, 10 km around the Nahuelbuta National Park, 900 m, margin of the forest, collected at night, 15 February 2002, leg. Parwis Nabavi, deposited in MNHNC and ZIMG (holotype MNHNC-8020; paratypes ZIMG II-28327-28329).
Other material examined. CHILE: Region IX (Araucanía): Same data as the types (1 female deposited in SMF; 2 penultimate males in ZSM; 1 female, 1 penultimate male in BMNH; 1 female, 3 penultimate males in CJW; 2 females, 4 penultimate males in ZIMG).
Derivatio nominis: The species epithet is a noun in apposition in honour of the collector of the type material, Parwis Nabavi (Freiburg, Germany).
Diagnosis. General body appearance as in other Austrochilus species (Fig. 1), and similar to A. forsteri by the clypeal height (around 3–3.5 x the diameter of AME) (Figs 2, 3; see also Grismado et al. 2003, p. 149). Males of A. parwis sp. n. resemble those of the remaining congeners by the general morphology of the copulatory bulb, with a median apophysis of similar length to the embolus (Figs 4, 14–19), but clearly differ by the hook-shaped tip of the tegulum and the shape of the subtegulum (Figs 4, 14–19; see also Forster et al. 1987, figs 124, 130, 136, 142, 148; Grismado et al. 2003, fig. 1). The shape of subtegulum, median apophysis and conductor are similar to A. forsteri, but the subtegular process is more slender in A. parwis sp. n. and the dorsal hump on the prolateral side of the subtegulum is less prominent (Figs 4–6, 19; see also Grismado et al. 2003, fig. 1). The female genitalia have a prominent scape (‘anterior knob’ sensu Forster et al. 1987) as in A. franckei, A. newtoni and A. forsteri, but this is more rounded in A. parwis sp. n. (Figs 7, 8; see also Forster et al. 1987, figs 145, 151; Grismado et al. 2003, fig. 4). The internal genitalia are most similar to A. forsteri, but the lateral lobes are longer, distally curved and connected to the anterior lobe (Fig. 9; see also Grismado et al. 2003, fig. 6).
Description. Male (holotype, MNHNC-8020). Total length 8.2. Prosoma 4.5 long, 3.4 wide. Leg formula: 1243. Leg measurements: total length (femur/patella/tibia/metatarsus/tarsus): I 29.6 (7.5/1.9/8.5/8.3/3.4), tibia II 6.8, tibia III 3.8, tibia IV 5.8, pedipalpal femur 2.5. Coloration: Prosoma mainly light brownish, darkened medially and laterally, sternum brown, legs medium brown, opisthosoma mainly dark grey brown, book lungs and tracheal patches yellow. Prosoma: 1.32 x longer than wide; cuticule smooth, with feathery hairs similar to those on the pedipalpal and leg articles; fovea well developed; posterior row of eyes distinctly procurved, AME 0.15, ALE 0.27, PME 0.24, PLE 0.25, clypeus height at midline 0.45 (= three times the diameter of AME); basal cheliceral article large, promargin with five large teeth, retromargin with denticles on a hump, laterally with a small field of stridulatory files, fangs large in an oblique position. Legs: long, numerous bristles of medium length, single lined calamistrum in the middle third of metatarsus IV. Opisthosoma: oval, covered with short hairs, cribellum large and undivided. Pedipalp (Figs 4–6): Trochanter proventrally with a blunt stridulatory outgrowth facing the stridulatory files (no pick); tibia with two irregular rows of more than a dozen long trichobothria and feathery hairs; cymbium long and slender, subtegulum with large hook-like retrolateral process, and dorsal hump on prolateral side (Fig. 4, arrowhead), tegulum with a blunt hook-like tip, median apophysis slender and weakly sclerotized in basal half, embolus large with retrolateral sclerotized tip, distal part of spermophor clearly visible (Fig. 4, arrow). Note that the prosoma of the holotype is dorsally compressed and the right legs I and II are missing.
Female. Similar to male but larger, the stridulatory files slightly corniculate and without a distinct hump on the pedipalpal trochanter. Total length 11–14, prosoma 5.5–6.2 long, 4.2–5.3 wide; leg I 8.2/2.5/9.8/8.7/3.8, tibia II 6.9, tibia III 4.5, tibia IV 6.0, pedipalpal tarsus 2.5. Eyes and clypeus variable, clypeus at midline 2.6–4.5 x diameter of AME. Pedipalp large and spiny, tarsal claw well developed, toothed. Genitalia (Figs 7–13): scape prominent and rounded, extending over epigastric furrow, cuticle anterior to scape folded (Fig. 11); genital opening with strong and large sclerotized area (=transversal plate sensu Forster et al. 1987) with ridge-like sclerotization pattern laterally (Figs 10, 11), anterior lobe (aL) weakly sclerotized anteriorly and with strongly sclerotized plate (aP) (Figs 11, 12), long, curved lateral lobes (LL) connecting the anterior lobe with the basis of the uterus externus (Figs 9, 13).
Distribution. Known only from type locality.
description: Published as part of Wunderlich, Joerg, 2017, The spider genus Austrochilus Gertsch & Zapfe, 1955 (Araneae: Austrochilidae) - a new species from Chile and a documentation of the male genitalia of austrochilines, pp. 323-332 in Zootaxa 4312 (2) on pages 325-327, DOI: 10.11646/zootaxa.4312.2.7, http://zenodo.org/record/852900