Agyneta sandia Dupérré, 2013, new species
Creators: name: Dupérré, Nadine
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Agyneta
Agyneta sandia

description: Agyneta sandia new species
Figs 283–290, map 19
Type material: Male holotype from New Mexico, Bernalillo County, Sandia Mountains, C.C. Hoff (AMNH). EXAMINED.
Etymology: The specific name is a noun in apposition taken from the type locality Sandia Mountains, New Mexico, USA.
Diagnosis: Males are diagnosed from all Agyneta species by their straight, Y-shaped lamella characteristica (Fig. 283). From other species of the group by the large gap between the dorsal and ventral cymbial tubercles (Fig. 284), narrower in all other species (Figs 255, 266, 275). Females are diagnosed from all Agyneta by their basally narrow proximal part of scape enlarging in a spatula-shaped plate (Fig. 287). To distinguish it from A. barfoot see diagnosis of the latter.
Description: Male: Total length 1.90; carapace length 0.84, width 0.72.
MAP. 19. Localities of Agyneta sandia n. sp.
CEPHALOTHORAX: Carapace yellow, shiny, finely reticulate; margin, radiating lines suffused with dark gray. Sternum suffused with dark gray. Clypeus height 2. Chelicerae yellow, excavated; ~ 11 seta-tipped tubercles; promargin two teeth, retromargin three tiny denticles; both margins with rounded projection at base of fang, smaller on promargin. Cheliceral stridulatory organ ~ 58 striae, well spaced slowly getting close together basally. ABDOMEN: Oval, uniformly light to dark gray. LEGS: Yellow; leg I total length: 3.63; leg III total length: 2.47; Tm I: 0.20, Tm IV absent. GENITALIA: Palpal retrolateral tibial apophysis curved, smooth; dorsal tibial apophysis absent; two retrolateral, one dorsal trichobothria (Fig. 283). Cymbium triangular; glabrous depression present (Fig. 283); dorsal cymbial turbercle sharp and rugose; ventral cymbial tubercle elongated, pointed and smooth; prolateral notch shallow (Fig. 284). Paracymbium apical pocket medium, anterior pocket short and curved, posterior pocket angled (Fig. 283). Embolus tip pointed and thin; small spines apically; basally with two spikes; Fickert’s gland basal, slightly enlarged; ventral lamella slender and pointed; thumb short, reaching below the embolus proper (Fig. 285). Embolus proper set apically, of equal part (Fig. 285). Anterior terminal apophysis long, narrow with thin long protrusions, no extra process; posterior terminal apophysis with two sharp pointed tip; lamella characteristica long, ending in two large well sclerotized point, with a transparent lamella in between (Fig. 286).
Female: Total length 1.99; carapace length 0.75, width 0.59.
CEPHALOTHORAX: Coloration as in male. Chelicerae promargin five teeth, retromargin four denticles. Cheliceral stridulatory organ ~ 51 striae, narrowly spaced. ABDOMEN: Oval, uniformly light to dark gray. LEGS: Coloration as male; palpal tarsal claw absent; leg I total length: 3.00; leg III total length: 2.13; Tm I: 0.22, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape narrow basally, enlarging (2.5x) and spatula-shaped; epigynal slits large, not reaching the anterior part of epigynum; pit hook depression absent (Fig. 287); lateral lobes long and folded; stretcher minuscule; pit deep (Fig. 288). Median part of scape narrow, short, wrinkled; genital pores situated at base of lateral lobes pockets (Fig. 289). Internal genitalia with an oval ventral receptacula and an elongated horizontally positioned dorsal one (Figs 288, 289).
Other material examined: USA: Arizona: 45km E Douglas, Guadalupe Canyon, 13.vii.1972, 4Ƥ (CAS); Chiricahua Mountains, 11.vi. 1973, 2743m, 23, V. Roth (CAS); Chiricahua Mountains, Barfoot Meadows, 05.vii.1975, 131Ƥ, D. Ubick (DUC); Chiricahua Mountains, Cave Creek Canyon, 28.viii.1982, 1554– 1615m, pitfall, 23, V. Roth (CAS); Chiricahua Mountains, Cave Creek Canyon, outside of Woodcutter’s Cave, 26.vii.1996, 5200ft, 2Ƥ, P. Craig, V. Roth, D. Ubick (DUC); Chiricahua Mountains, E Turkey Creek, 10.viii.1991, under rocks, 237Ƥ, A. Jung (DUC); Chiricahua Mountains, Upper Cave Creek, 1828-2286m, can traps, 27.vii.1984, 73, 22.viii.1984, 23, V. Roth (CAS); Flagstaff, 16.vi.1934, 13, W. Ivie, H.A.R (AMNH); Hualpal Mountains, 6500ft, 04.viii.1956, 1Ƥ, R. Schick (AMNH); Santa Catalina Mountains, Nugget Cave, 21.vii.1993, 13, R. Pape (DUC); Santa Catalina Mountains, Mount Bigelow, 24.vii.1965, 1Ƥ, W. Gertsch, R. Hastings (AMNH). New Mexico: Emory Pass Summit, Mimbres Mountains, 06.ix.1941, 13, W. Ivie (AMNH); Sandia Mountains, 13, C. Hoff (AMNH). Texas: 6.4km N Lockhart, 13.iv.1963, 6Ƥ, W. Gertsch, W. Ivie (AMNH); Bastrop State Park, 24– 27.v.1983, oak woods, 1Ƥ, S., J. Peck (AMNH); Bill Haney Pecan Orchard, FM 1476, 3.2km E US 377/67, 02 - 09.v.2001, pitfall in pecan orchard, 232Ƥ, A. Calixto (TAMU); Constant Sorrow Cave, Camp Bullis, 17.iv.2001, 1Ƥ, J. Reddell, J. Reyes (TMM); Get a Rope Cave, Camp Bullis, 23.viii.2000, 1Ƥ, G. Veni (JCC); Mastodon Pit, 17.vi.1993, 1Ƥ, S. Harden, G. Veni (JCC). Utah: Verdure, 12.v.1933, 13, W. Ivie (AMNH).
Distribution: Southwestern USA (Arizona to Texas).
The parva group is the largest and includes eleven species, the group contains some Eastern species, A. parva (Banks 1896), A. evadens (Chamberlin 1925), A. unimaculata (Banks 1892), A. barrowsi (Chamberlin & Ivie 1944), and A. regina (Chamberlin & Ivie 1944), and some Southwestern species, A. spicula n. sp., A. grandcanyon n. sp., A. chiricahua n. sp., A. crista n. sp., A. tuberculata n. sp. and A. catalina n. sp.
The group is defined by two unique characters. The first is the presence of a prong (serrated or not) at the tip of embolus (Figs 292, 311, 318, 339, 371; note that this prong is not an extension of the embolus proper like in the A. fillmorana group). Second, the embolus proper set vertically and not related to the tip of the embolus (Fig. 292).
Within the group we can easily cluster some similar species, A. parva (Banks 1896), A. evadens (Chamberlin 1925), A. unimaculata (Banks 1892), A. spicula n. sp., A. grandcanyon n. sp., A. chiricahua n. sp. and A. regina (Chamberlin & Ivie 1944). They all share non-excavated chelicerae without seta-tipped tubercles in males and the none serrated prong at the tip of the embolus.
In A. barrowsi (Chamberlin & Ivie 1944), A. crista n. sp., A. tuberculata n. sp. and A. catalina n. sp., males have excavated chelicerae with seta-tipped tubercles, a serrated prong at the tip of the embolus (Figs 356, 363, 371, 378) and an associated prong at the base of the posterior terminal apophysis (Figs 357, 364, 372, 379).
Members of the parva group can be characterized as such, palpal tibia with two retrolateral trichobothria and a dorsal one; very well developed retrolateral and dorsal tibial apophyses (Fig. 290); embolus with apical prong; Fickert’s gland absent; ventral lamella reduced to absent. Note that the ventral lamella in this group is sometimes difficult to observe. Females have long lateral lobes (sometimes folded) and long stretchers (Figs 297, 314, 353).
description: Published as part of Dupérré, Nadine, 2013, Taxonomic revision of the spider genera Agyneta and Tennesseellum (Araneae, Linyphiidae) of North America north of Mexico with a study of the embolic division within Micronetinae sensu Saaristo & Tanasevitch 1996, pp. 1-189 in Zootaxa 3674 (1) on pages 92-96, DOI: 10.11646/zootaxa.3674.1.1, http://zenodo.org/record/283954