Agyneta grandcanyon, Dupérré, Nadine, 2013

Agyneta grandcanyon View in CoL new species

Figs 326–335 View FIGURES 326 – 335 , map 23

Type material: Male holotype and female allotype from Arizona, Grand Canyon, Colorado River-side, mile 169, Oct. 27, 1982, V. Roth ( AMNH). EXAMINED.

Etymology: The specific name is a noun in apposition taken from the type locality Grand Canyon National Park, USA.

Diagnosis: Males and females are diagnosed by their abdominal patterns ( Figs 330, 331 View FIGURES 326 – 335 ). Males are distinguished by their unique small, pointed dorsal cymbial tubercle ( Fig. 327 View FIGURES 326 – 335 ) and their elongated retrolateral tibial apophysis ( Fig. 326 View FIGURES 326 – 335 ). Female are differentiated from all other Agyneta by their uniquely long and narrow proximal part of scape ( Fig. 332 View FIGURES 326 – 335 ).

Description: Male: Total length 1.64; carapace length 0.78, width 0.64.

MAP. 23. Localities of Agyneta barrowsi ( Chamberlin & Ivie 1944) , Agyneta grandcanyon n. sp.

CEPHALOTHORAX: Carapace light yellow-orange, shiny, finely reticulate; suffused with gray along radiating lines. Sternum suffused lightly with gray, darker along margin, reaching all the way between coxae four to the pedicel. Cypeus low ( 2x AME). Chelicerae light yellow; not excavated, seta-tipped tubercles absent; promargin three denticles, retromargin three tiny denticles. Cheliceral stridulatory organ ~14 striae, well spaced throughout. ABDOMEN: Off-white with dark median band and transverse bands on posterior half or dark median band broken, with a large arrow-shaped mark ( Fig. 330 View FIGURES 326 – 335 ) or else same as female, off-white with basal, lateral dark marks ( Fig. 331 View FIGURES 326 – 335 ).

LEGS: Light yellow; leg I total length: 3.61; leg III total length: 2.37; Tm I: 0.23, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis long, smooth and narrow; dorsal tibial apophysis with curved, pointed tip; two retrolateral trichobothria and one dorsal ( Fig. 326 View FIGURES 326 – 335 ). Cymbium triangular; glabrous depression present ( Fig 326 View FIGURES 326 – 335 ); dorsal cymbial tubercle small, smooth and pointed; ventral tubercle large and smooth; prolateral notch shallow ( Fig. 327 View FIGURES 326 – 335 ). Paracymbium apical pocket short, anterior pocket short, posterior pocket absent ( Fig. 326 View FIGURES 326 – 335 ). Embolus tip wide, rounded with long prong; ventrally rugose; basally with one large spike; Fickert’s gland absent; ventral lamella absent; thumb reaching the embolus proper ( Fig. 328 View FIGURES 326 – 335 ). Embolus proper set apically on a vertical ridge, of equal part ( Fig. 326 View FIGURES 326 – 335 ). Anterior terminal apophysis large with numerous, long protrusions and extra bifid apophysis basally; posterior terminal apophysis long, basally with large tooth-like extension with numerous small spines; lamella characteristica elongated with pointed tip ( Fig. 329 View FIGURES 326 – 335 ).

Female: Total length 1.88; carapace length 0.68, width 0.58.

CEPHALOTHORAX: Coloration as in male. Chelicerae light yellow; promargin four denticles, retromargin two tiny denticles. Clypeus height 2. Cheliceral stridulatory organ visible ~10 striae, well spaced. ABDOMEN: Off-white with median dark band and dark transverse band or off-white with small, dark latero-basal marks ( Fig. 331 View FIGURES 326 – 335 ). LEGS: Same as male; palpal tarsal claw absent; leg I total length: 3.90; leg III total length: 2.71; Tm I: 0.24; Tm IV: absent. GENITALIA: Epigynum with long and narrow proximal part of scape, slightly narrowing apically; epigynal slits large; pit hook depression absent ( Fig. 332 View FIGURES 326 – 335 ); lateral lobes very long; stretcher long; pit deep ( Fig. 335 View FIGURES 326 – 335 ). Median part of scape long, narrow and parallel; genital pores located at the base of the lateral lobes ( Fig. 334 View FIGURES 326 – 335 ). Internal genitalia with rounded ventral receptacula, dorsal receptacula elongated ( Figs 333, 334 View FIGURES 326 – 335 ).

Other material examined: USA: Arizona: 16km E Sierra Vista, San Pedro River, 09.iv.1973, 1Ƥ ( AMNH); 45km E Douglas, Guadalupe Canyon, 11.vi.1968, 1Ƥ, 13.vii.1972, 437Ƥ, 16.viii.1983, 131Ƥ, V. Roth ( CAS); Chiricahua Mountains, Stewart Campground, 12.viii.1981, riparian under rocks, 133Ƥ, D. Ubick ( DUC); Chiricahua Mountains, Southwestern Research Station, 1645m, 16.xi.1964, 1Ƥ, 08.xi.1965, 1Ƥ, V. Roth ( DUC); Chiricahua Mountains, Southwestern Research Station, 1645m, 31.viii.1970, 1Ƥ, 01–15. iii.1972, 13, V.R o t h ( CAS); Chiricahua Mountains, Southwestern Research Station, 1645m, 15.iii.1965, 131Ƥ, 04.iv.1966, 1Ƥ, V.Roth ( AMNH); Chiricahua Mountains, Southwestern Research Station, 1676m, 25.vii.1996, riparian forest, 333Ƥ, D. Ubick ( DUC); Chiricahua Mountains, Southwestern Research Station, 1645m, 12.ix.1971, pitfall, 23, A. Jong ( CAS); Chiricahua Mountains, Southwestern Research Station, 8km W Portal, 1645m, 09.vii.1963, 1Ƥ, V. Roth ( AMNH); Grand Canyon, Colorado, mile 169, 17.x.1982, Tamarix duff, river side, 43, V. Roth ( AMNH); Grand Canyon, Colorado, mile 48, 18.x.1982, Tamarix duff, river side, 133Ƥ, V. Roth ( CAS); Monument Valley, 23 ( AMNH); Patagonia, 29.xii.1940, 434Ƥ, D., S. Mulaik ( AMNH); Phoenix, 02.iv.1938, 13 ( AMNH); South Mountain View, 09.ix.1941, 131Ƥ, W. Ivie ( AMNH); South Fork, 6.4km W Portal, 09.viii.1965, 1Ƥ, W. Gertsch ( AMNH); Virgin Narrows, 8km E Littlefield, 11.vi.1934, 131Ƥ, W. Ivie, H. Rasmussen ( AMNH); Virgin Narrows, near Littlefield, 19.iv.1932, 5Ƥ, W. Ivie ( AMNH). California: 11km W El Centro, 14.iii.1941, 1Ƥ, W. Ivie ( AMNH); Cow Creek Canyon, Funeral Mountains, 25.iv.1955, 1Ƥ, R. Schick ( AMNH); Fort Yuma, 131Ƥ ( AMNH); Palm Canyon, Palm Springs, 27.iii.1960, 131Ƥ, W. Gertsch, W. Ivie ( AMNH). Nevada: Muddy River, 22km SE of Moapa, 10.vi.1934, 331Ƥ, W. Ivie, H. Rasmussen ( AMNH). Utah: Bluff, 11.v.1933, 43, 12.v.1933, 43, W. Ivie ( AMNH); Zion National Park, 09.vi.1927, 131Ƥ, R. Chamberlin ( AMNH); Zion National Park, viii.1937, 1 Ƥ ( AMNH).

Distribution: Southwest USA.