Agyneta barfoot, Dupérré, Nadine, 2013

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, Zootaxa 3674 (1), pp. 1-189 : 91-92

Agyneta barfoot new species

Figs 274–282 , map 18

Type material: Male holotype from Arizona, Cochise County, Chiricahua Mountains, Barfoot Meadows, July 5, 1975 ( CAS). EXAMINED.

Etymology: The specific name is a noun in apposition taken from the type locality Barfoot Meadows, USA.

Diagnosis: Males and females are diagnosed by their dark gray abdomens with chevrons ( Figs 278, 279 ). Additionally males are distinguished from all species by their elongated, sword-shaped palpal retrolateral tibial apophysis ( Fig. 274 ). From closely related species A. sandia by the larger dorsal cymbial tubercle ( Fig. 275 ), very short in the latter ( Fig 284 ). Females are distinguished from all other Agyneta by their extremely large epigynal slits reaching the anterior part of the epigynum ( Fig. 280 ). From A. sandia by the elongated lateral lobes ( Fig. 281 ), short in the latter ( Fig. 288 ).

Description: Male: Total length 1.92; carapace length 0.83, width 0.66.

CEPHALOTHORAX: Carapace orange, shiny, finely reticulate; margin, radiating lines strongly suffused with dark gray; trident mark often present. Sternum strongly suffused with dark gray. Clypeus height 3. Chelicerae orange, excavated; ~ 13 seta-tipped tubercles; promargin four teeth, retromargin four tiny denticles; both margins with rounded projection at base of fang. Cheliceral stridulatory organ ~ 64 striae, narrowly spaced. ABDOMEN: Oval, uniformly light to dark gray or with five dark gray chevrons ( Fig. 278 ) LEGS: Yellow-orange; femora with retrolateral and prolateral sides suffused with gray; leg I total length: 3.44; leg III total length: 2.50; Tm I: 0.20, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis elongated and rugose; dorsal tibial apophysis short, rounded and rugose; two retrolateral, one dorsal trichobothrium ( Fig. 274 ). Cymbium triangular; glabrous depression present ( Fig. 274 ); prolateral notch shallow; dorsal cymbial turbercle sharp, pointed and smooth; ventral cymbial tubercle elongated, rounded and smooth ( Fig. 275 ). Paracymbium apical pocket medium, anterior pocket short and curved, posterior pocket small and straight ( Fig. 274 ). Embolus tip pointed and thin; basally with large prong; Fickert’s gland basal, slightly enlarged; ventral lamella transparent, pointed; thumb short, reaching below the embolus proper ( Fig. 276 ). Embolus proper set apically, of equal part ( Fig. 276 ). Anterior terminal apophysis long with very few short protrusions and a large well sclerotized, pointed process basally; posterior terminal apophysis pointed; lamella characteristica long, with trident-shaped tip ( Fig. 277 ).

Female: Total length 2.02; carapace length 0.88, width 0.65.

CEPHALOTHORAX: Coloration as in male. Chelicerae promargin five teeth, retromargin five denticles. Cheliceral stridulatory organ ~51 striae, narrowly spaced. ABDOMEN: Oval, uniformly light to dark gray or with five dark gray chevrons ( Fig. 279 ). LEGS: Coloration as male; palpal tarsal claw absent, palpal tibia and metatarsus suffused with dark gray; leg I total length: 3.46; leg III total length: 2.58; Tm I: 0.26, Tm IV: absent. GENITALIA: Epigynum with wide proximal part of scape; epigynal slits extremely large; pit hook depression absent ( Fig. 280 ); lateral lobes elongated; stretcher small; pit deep ( Fig. 281 ). Median part of scape long, narrow; genital pores situated at base of lateral lobes pockets ( Fig. 282 ). Internal genitalia with elongated, obliquely positioned ventral and dorsal receptaculas ( Figs 281, 282 ).

Distribution: Southwestern USA, Arizona.

Other material examined: USA: Arizona: 6.4km S Bing Park, Chiricahua Mountains, 28.vi. 1967, 2743m, 231Ƥ, W. Gertsch, Hastings ( AMNH); 8km W Portal, South Western Research Station, 15.vi. 1940, 2286m, under rocks, 1Ƥ, D. Lowrie ( AMNH); Barfoot Meadows, Chiricahua Mountains, 05.vii.1975, 231Ƥ, D. Ubick ( DUC); Barfoot Park, Chiricahua Mountains, 19.viii. 1990, 2743–2286m, 2Ƥ, V. Roth ( CAS); Barfoot Park, 16km W Portal, 19.vii.1964, 23, W. Gertsch, Woods ( AMNH); Green House Canyon, Chiricahua Mountains, 14.v.1968, 1Ƥ, L. Herman ( AMNH); Pinecrest, Graham Mountain, 13.ix.1950, 2Ƥ, W. Gertsch ( AMNH); Summerhaven, Santa Catalina Mountains, 10.ix.1963, 1Ƥ, W. Gertsch, V. Roth ( AMNH).

Figures

FIGURES 274 – 282. Agyneta barfoot n. sp. 274 – 278, Male. 279 – 282, Female. 274. Palp, retrolateral view. 275. Palp, prolateral view. 276. Embolus, prolateral view. 277. Radical division, retrolateral view. 278. 279. Abdomen, dorsal view. 280. Epigynum, ventral view. 281. Internal genitalia, ventral view. 282. Internal genitalia, dorsal view.

FIGURES 283 – 289. Agyneta sandia n. sp. 283 – 286, Male. 287 – 289, Female. 283. Palp, retrolateral view. 284. Palp, prolateral view. 285. Embolus, prolateral view. 286. Radical division, retrolateral view. 287. Epigynum, ventral view. 288. Internal genitalia, ventral view. 289. Internal genitalia, dorsal view.