Agyneta hedini Paquin & Dupérré 2009

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 : 124-126

Agyneta hedini Paquin & Dupérré 2009

Figs 402–411 , map 27

Agyneta hedini Paquin & Dupérré 2009 , in Paquin, Dupérré & Reddell 2009: 47, f. 12–23 (Description Ƥ).

Type material: Agyneta hedini Paquin & Dupérré 2009 , 3 HOLOTYPE, Ƥ ALLOTYPE, from Colorado: Fremont Co., 13 mi N Cañon City, Five Mile Creek, Marble Cave, 6 May 1992, on ground in flood debris in dark zone of cave, M.C. Hedin ( AMNH). EXAMINED.

Diagnosis: Males and females are separated from all other species in the genus by their unique abdominal pattern ( Figs 406, 407 ). Males can be distinguished from all other species by their uniquely large, rugose ventral cymbial tubercle associated with adjacent protuberance ( Fig. 403 arrow). Females are differentiated from all Agyneta species by the conspicuous converging copulatory ducts visible on the epigynum ( Fig. 408 ), from A. platnicki by the converging copulatory ducts almost reaching the apex of the proximal part of scape, whereas the copulatory ducts are not reaching the proximal part of scape in A. platnicki ( Fig. 418 ).

Description: Male: Total length 2.51; carapace length 1.09, width 0.90.

CEPHALOTHORAX: Carapace yellow, shiny, finely reticulate; margin suffused with gray. Sternum light yellow, lightly suffused with gray. Clypeus height 3. Endites with seta-tipped tubercles. Chelicerae yellow, excavated; ~ 21 seta-tipped tubercles; promargin four teeth, retromargin three denticles. Cheliceral stridulatory organ visible ~32 striae, evenly spaced. ABDOMEN: Off-white with gray pattern ( Fig. 406 ). LEGS: Light yellow; leg I total length: 5.70; leg III total length: 4.59; Tm I: 0.22, Tm IV: absent. GENITALIA: Palpal tibia with elongated, smooth retrolateral tibial apohysis; dorsal tibial apophysis absent; two retrolateral trichobothria and a dorsal one ( Fig. 402 ). Cymbium with conical extension; glabrous depression present ( Fig. 402 ); dorsal cymbial tubercle small; ventral tubercle rugose with associated large protuberance; prolateral notch extremely deep ( Fig. 403 ). Paracymbium apical pocket small, anterior pocket long and curved, posterior pocket absent ( Fig. 402 ). Embolus tip bent, with spiny extension apically; basally and ventrally spiny; Fickert’s gland bulbous; ventral lamella absent; thumb extending beyond the embolus proper ( Fig. 404 ). Embolus proper set medially, with transparent hooked flange ( Fig. 404 ). Anterior terminal apophysis large, sickle-shaped; posterior terminal apophysis, large, striated; lamella characteristica small, well sclerotized and bifid tip with protrusions ( Fig. 405 ).

Female: Total length 2.37; carapace length 1.04, width 0.82.

MAP. 27. Localities of Agyneta hedini Paquin & Dupérré 2009 , Agyneta platnicki n. sp., Agyenta ledfordi n. sp.

CEPHALOTHORAX: Coloration as in male. Chelicerae light yellow; promargin four teeth, retromargin five large denticles. Cheliceral stridulatory organ ~27 striae, evenly spaced. ABDOMEN: Off-white with gray pattern ( Fig. 407 ). LEGS: Same as male; palpal tarsal claw absent; leg I total length: 6.33; leg III total length: 4.27; Tm I: 0.26, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape narrow, sides parallel slightly enlarging apically; epigynal slits rounded; pit hook depression absent ( Fig. 408 ); lateral lobes elongated; stretcher small; pit deep ( Fig. 410 ). Median part of scape very narrow ( Fig. 410 ); genital pores positioned in the beginning of median part of scape ( Fig. 411 ). Internal genitalia with small curved, ventral receptacula, dorsal receptacula oval ( Figs 409, 410 ).

Other material examined: USA: Arizona: 32km W Winslow, Buffalo Crack, 01.ii.1976, 131Ƥ, C. Welbourn ( AMNH); Moqui Cave, 08.x.1953, twilight zone to total dark, 13, R. deSaussure ( AMNH); Rattlesnake, 14.vii.1962, 131Ƥ, 15.vii.1962, 1Ƥ, R. Graham ( AMNH).

Distribution: Southwestern USA.

Figures

FIGURES 402 – 411. Agyneta hedini Paquin & Dupérré 2009. 402 – 406, Male. 407 – 411, Female. 402. Palp, retrolateral view. 403. Palp, prolateral view (arrow points to protuberance). 404. Embolus, prolateral view. 405. Radical division, retrolateral view. 406. 407. Abdomen, dorsal view. 408. Epigynum, ventral view. 409. Internal genitalia, ventral view. 410. Internal genitalia, dorsal view. 411. Internal genitalia, lateral view.

FIGURES 412 – 420. Agyneta platnicki n. sp. 412 – 416, Male. 417 – 420, Female. 412. Cymbium, prolateral view. 413. Palpal tibia, retrolateral view. 414. Embolus, prolateral view. 415. Radical division, retrolateral view. 416. 417. Abdomen, dorsal view. 418. Epigynum, ventral view. 419. Internal genitalia, ventral view. 420. Internal genitalia, dorsal view.