Aucana platnicki, 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 : 106

publication ID

https://doi.org/ 10.1206/0003-0090(2000)254<0001:NWPSAP>2.0.CO;2

persistent identifier

https://treatment.plazi.org/id/03ACD276-8F3D-FF80-FF66-FC0C44B53A87

treatment provided by

Felipe

scientific name

Aucana platnicki
status

new species

Aucana platnicki , new species Figures 17 View Figs , 44 View Figs , 85 86 View Figs , 133 View Figs , 157 View Figs , 395 View Figs 405

TYPES: Male holotype, 63 11♀ paratypes from Choapa : Nague, 10 km N Los Vilos, km 236, Rt 5 (31°50'S, 71°31'W), Coquimbo, Chile GoogleMaps ; elev. 40 m, Nov. 13, 1993 (N. I. Platnick, K. Catley, M. Ramirez, R. T. Allen), in AMNH .

ETYMOLOGY: Named for the principal collector of the type material.

DIAGNOSIS: Distinguished from the closely related A. ramirezi by the straighter procursus (compare figs. 403, 407), from A. petorca by the stronger tip and proximal apophysis of the procursus (compare figs. 403, 411); from other congeners also by the three tiny cones frontally on the male chelicerae (fig. 400).

MALE (holotype): Total length 1.35, carapace width 0.61; leg 1: 4.06 (1.03+0.19 +1.13+1.23+0.48), tibia 2: 0.81, tibia 3: 0.68, tibia 4: 1.03; tibia 1 l/d: 17. Habitus as in fig. 395. Entire prosoma orange to light brown, only carapace slightly darker medially; no thoracic groove (fig. 397), distance PME-ALE about 35% of PME diameter. Sternum without anterior humps. Chelicerae light brown, with stridulatory ridges laterally (pick is a modified hair proximally on palpal femur), and three pairs of tiny black cones frontally (fig. 400). Palps as in figs. 398 399, coxa without retrolateral apophysis, femur proximally with retrolateral apophysis; procursus with proximal apophysis, and black, slightly bent distal tip (figs. 402 403); tarsal organ exposed (fig. 86); bulb large, with several short distal elements (figs. 398 399). Legs monochromous orange-ochre, with very faint darker rings on femora and tibiae (subdistally), each followed by lighter tips; legs without spines, without curved and vertical hairs; retrolateral trichobothrium of tibia 1 at 59%; tarsus 1 with ~ 5 6 pseudosegments. Opisthosoma ochre, covered dorsally with blackish spots; without epiandrous spigots (fig. 133), ALS with piriform gland spigots (fig. 157).

VARIATION: Tibia 1 in 9 males: 0.97 1.16 (x¯ = 1.09). In the single male from Bío-Bío the proximal apophysis on the procursus is less well developed. For this reason, and because of the geographic distance to the type locality, the specimen is assigned tentatively to the species.

FEMALE: Total length (N = 11) 1.2 1.7 (x¯ = 1.4); tibia 1 (N = 10) 1.00 1.10 (x¯ = 1.05). In general very similar to male. Epigynum light brown, very simple externally (fig. 404); internally with transparent median sac (receptacle?) (fig. 405).

DISTRIBUTION: Known from Coquimbo and Valparaiso ( Chile) (and maybe Bío-Bío, see above).

MATERIAL EXAMINED: CHILE: Coquimbo: Choapa: Nague: types above ; Nague , Sept. 26, 1980 (L. E. Pena), 13 in AMNH ; Valparaiso: Vina del Mar , Apr. 1979 (A. Tobar), 33 1♀ in AMNH ; Bío-Bío: Arauco: Pata de Gallina , elev. 560 m, Feb. 11, 1992 (N. I. Platnick, P. Goloboff, M. Ramirez), 13 in AMNH (tentatively assigned; see above) .

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Aucana