Agyneta manni ( Crawford & Edwards 1989 )

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 : 149-150

Agyneta manni ( Crawford & Edwards 1989)

Figs 485–491

Meioneta manni Crawford & Edwards 1989: 437 , f. 36–40. (Description Ƥ). Agyneta manni Buckle et al. 2001: 100 . (Transferred from Meioneta ).

Type material: Meioneta manni Crawford & Edwards 1989 , 3 HOLOTYPE from Muir Ridge, 10-25.vii.1975, pitfalls at snow and rock edge, R. Crawford ( UWBM). NOT EXAMINED.

Paratypes series EXAMINED.

Diagnosis: Males are diagnosed from most species in the genus by the absence of the anterior and posterior pockets of the paracymbium ( Fig. 485 ), from all species of the fillmorana group by their none serrated embolus proper ( Fig. 487 ). Females are distinguished from most Agyneta by their wide proximal part of scape with straight sides and shallow but broad pit hook depression ( Fig. 489 ), to distinguish from A. ordinaria see diagnosis of the latter.

Description: Male: Total length 2.02; carapace length 0.91, width 0.70.

CEPHALOTHORAX: Carapace orange-brown, shiny, finely reticulate; suffused with dark gray along margin and radiating lines; trident mark present. Sternum orange-brown suffused with dark gray. Clypeus height 3. Chelicerae orange-brown, strongly excavated; ~12 seta-tipped tubercles; promargin three teeth, retromargin four denticles, promargin with large triangular projection near base of fang, retromargin with truncated projection. Cheliceral stridulatory organ ~29 strong striae, well spaced, slowly getting closer basally. ABDOMEN: Uniformly gray. LEGS: Orange; total length leg I: 3.44, total length leg III: 2.50; Tm I: 0.21, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis elongated, tip rounded, with a spike medially; dorsal tibial apophysis wide and smooth; two retrolateral trichobothria and a dorsal one ( Fig. 485 ). Cymbium triangular; glabrous depression present ( Fig. 485 ); cymbial tubercles absent; prolateral notch shallow ( Fig. 486 ). Paracymbium apical pocket short, anterior and posterior pocket absent, with one spine posteriorly ( Fig. 485 ). Embolus tip pointed, with large “swirled element”; Fickert’s gland medial, elongated; ventral lamella transparent, large and spiny with two large prongs basally, joining the thumb; thumb short, reaching well below the embolus proper ( Fig. 487 ). Embolus proper set apically on a horizontal ridge associated with the embolus tip, dorsal part slightly wider ( Fig. 487 ). Anterior terminal apophysis wide, tip with long protrusions; terminal apophysis narrow and blunt; lamella characteristica small, one narrow, one large triangular tip ( Fig. 488 ).

Female: Total length 1.69; carapace length 0.80, width 0.64.

CEPHALOTHORAX: Same coloration as male. Chelicerae orange; promargin five teeth, retromargin five denticles. Cheliceral stridulatory organ ~29 striae, well spaced slowly getting closer basally. ABDOMEN: Same as male. LEGS: Same as male; palpal claw absent; total length leg I: 3.46, total length leg III: 2.55; Tm I: 0.27, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape wide, sides parallel; epigynal slits small; pit hook depression shallow ( Fig. 489 ); lateral lobes elongated and folded; stretcher small; pit deep ( Fig. 490 ). Median part of scape narrow; genital pores situated at base of lateral lobes pockets ( Fig. 491 ). Internal genitalia with large, oval receptacula obliquely positioned ( Figs 490, 491 ).

Other material examined: USA: Washington: Beardhead Mountain summit, 15.viii. 1982, 1855m, under rocks, 131Ƥ (paratypes), R. Crawford ( UWBM); Golden Gate, 1950m, pitfalls in heath and sedge meadow, 04– 11.viii.1975, 131Ƥ, 11–25. viii.1975, 13 (paratypes), D. Mann ( UWBM); McClure Rock, 2225m, pitfalls in fellfield meadow, 11–25. viii.1975, 13, 24.ix.1975 – 04.viii.1976, 1Ƥ, 15.viii–04. viii.1976, 1 Ƥ (paratypes), D. Mann ( UWBM).

Distribution: Northwestern USA, Washington (for complete list of localities see Crawford & Edwards, 1989).

Figures

FIGURES 485 – 491. Agyneta manni (Crawford & Edwards 1989). 485 – 488, Male. 489 – 491, Female. 485. Palp, retrolateral view. 486. Palp, prolateral view. 487. Embolus, prolateral view (arrow points to swirled element). 488. Radical division, retrolateral view. 489. Epigynum, ventral view. 490. Internal genitalia, ventral view. 491. Internal genitalia, dorsal view.