Agyneta bucklei, 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 : 70-71

Agyneta bucklei new species

Figs 202–208 , map 13

Type material: Male holotype and female allotype taken in Washington, Chelan County, Boulder Creek, 1350’, 48.335ºN 120.683ºW, 24.ix. 1998, 3 in Acer-Cornus litter in ravine, Ƥ under stone in ravine, R. Crawford ( UWBM). EXAMINED.

Etymology: The specific name is a patronym in honor of Don Buckle for his contribution to Linyphiidae taxonomy, and for his support and friendship.

Diagnosis: Males are diagnosed from all species by the large, rugose and squared dorsal cymbial tubercle ( Fig. 203 ). Females are distinguished from all species by the narrow, dark proximal part of scape ( Fig. 206 ). From A. fillmorana and A. darrelli , by the vertical sides of the proximal part of scape ( Fig. 206 ), oblique in A. fillmorana and A. darrelli (Figs 181, 191).

Description: Male: Total length 2.20; carapace length 1.00, width 0.76.

CEPHALOTHORAX: Carapace orange, shiny, finely reticulate; lightly suffused with dark gray along radiating lines, pars cephalica and margin. Sternum completely suffused with dark gray. Clypeus height 2. Chelicerae orange; not excavated; seta-tipped tubercles absent; promargin three denticles, retromargin two tiny denticles. Cheliceral stridulatory organ easily visible ~20 striae, well spaced. ABDOMEN: Uniformly light to dark gray. LEGS: Light orange; leg I total length: 4.81; leg III total length: 3.43; Tm I: 0.27, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis absent; dorsal tibial apophysis triangular, rugose; one retrolateral and one dorsal trichobothria ( Fig. 202 ). Cymbium with retrolateral fold; glabrous depression present ( Fig. 202 ); dorsal cymbial tubercle large and square; ventral cymbial tubercle absent; prolateral notch shallow ( Fig. 203 ). Paracymbium apical pocket small, anterior pocket absent, posterior pocket small and rounded ( Fig. 202 ). Embolus tip pointed; tiny spines apically and basally; large spikes retro-ventrally; Fickert’s gland medial, bulbous; ventral lamella enlarged basally into a plate with small short spines, extending on the retrolateral side of the embolus all the way to the the embolus proper, with a row of spines; thumb short not reaching the embolus proper ( Fig. 204 ). Embolus proper set apically, serrated, crest-like, reaching the tip of embolus ( Fig. 204 ). Anterior terminal apophysis extremely wide with numerous, long protrusions; posterior terminal apophysis with sclerotized tip with ridges and an elongated prong basally; lamella characteristica narrow, with dentate curved tip, somewhat transparent ( Fig. 205 ).

Female: Total length 1.97; carapace length 0.89, width 0.68.

MAP. 13. Localities of Agyneta bucklei n. sp.

CEPHALOTHORAX: Same coloration as male. Chelicerae promargin five denticles, retromargin five tiny denticles. Cheliceral stridulatory organ easily visible ~9 striae, well spaced. ABDOMEN: Same as male. LEGS: Same as male; palpal tarsal claw absent; leg I total length: 4.39; leg III total length: 3.61; Tm I: 0.21, Tm IV: absent. GENITALIA: Epigynum with narrow, dark proximal part of scape with vertical sides; epigynal slits oval; pit hook depression shallow ( Fig. 206 ); lateral lobes very short and wide; stretcher medium; pit deep ( Fig. 207 ). Median part of scape narrow basally, widening apically; genital pores located at base of lateral lobes pockets ( Fig. 208 ). Internal genitalia with a small, rounded receptacula ventrally and large, rounded receptacula dorsally ( Figs 207, 208 ).

Other material examined: CANADA: British Columbia: DND Rocky Point, 27.xi.1994, malaise trap, garry oak in open meadow, 13, N. Winchester ( DBC); Saanich Inlet, Vancouver, 14.ix.1935, 1Ƥ, R. Chamberlin, W. Ivie ( AMNH); Terrace, 1937, 131Ƥ, W. Clark ( AMNH). USA: Oregon: Ashland, 02.ix.1959, 13, W. Gertsch, V. Roth ( AMNH); Ashland Watershed, 11.x.1998, pitfall, 13, R. Peck ( DBC); Jenny Creek, Medford District, pitfall, old growth, 1Ƥ, R. Peck ( DBC); Lookout Creek [44.218N, 122.249W] 502m, 18.x–09.xi.1983, pitfall, douglas fir, 13, G. Parsons ( UWBM). Washington: Bald Hill [46.822N, 122.439W] 259–310m, 25.iv.1992, 1Ƥ, 25.x.1992, 436Ƥ, oak litter, S. Choe, G. Matos ( UWBM); Blackberry Creek [48.341N, 120.715W] 362m, 23.ix.1998, mixed litter in alder forest, 23, R. Crawford ( UWBM); Boulder Creek [48.335N, 120.683W] 411m, 24.ix–13.x.1998, pitfall in ravine, 23, R. Crawford ( UWBM); Bullfrog Pond [47.193N, 121.005W] 597m, Populus leaf litter, 1Ƥ, R. Nelson ( UWBM); Chuckanut Mountain [48.671N, 122.471W] 396m, pitfall, forest floor, 2131Ƥ, R. Crawford ( UWBM); Cle Elum River [47.237N, 121.054W] 640m, 31.ix.2005, Berlese, cottonwood and douglas fir litter, 531Ƥ, R. Crawford ( UWBM); East of Lone Tree Mountain [46.48N, 121.8W] 1121m, 0 4–21.ix.1983, pitfall in clearcut, 131Ƥ, K. Johnson ( UWBM); Hollies Creek [47.892N, 118.219W] 719m, 21.v.1974, under rock, 1Ƥ, R. Crawford ( UWBM); Little Patos Island [48.784N, 122.964W] 9m, 24.ix–18.xii.1998, pitfall in grassland, 33, J. Bergdahl ( UWBM); Milk Canyon [46.855N, 120.819W] 911m, 09-11.xi.1996, litter, stony debris, 138Ƥ, Y. Marusik ( UWBM); Stehekin River [48.336N, 120.704W] 350m, 22.ix–13.x.1998, pitfall in meadow, 132Ƥ, R. Crawford ( UWBM); Swauk Pairie NW cemetery [47.203N, 120.744W] 713m, 22.v.2008, hawthorn litter, 1Ƥ, R. Crawford ( UWBM); W Badger Peak [46.285N, 121.913W] 1319m, 16.vi–02.vii.1983, pitfall at edge of clearcut, 1Ƥ, K. Johnson ( UWBM); W Spirit Lake [46.262N, 122.189W] 1042m, 0 2–11.x.1983, pitfall in pyrosclatics rocks, 1Ƥ, C. Becker ( UWBM); Weir Prairie [46.918N, 122.692W] 163m, 25.iii.1993, Quercus garrayana litter, 1Ƥ, J. Miller ( UWBM).

Distribution: Northwest Canada and USA (British Columbia to Oregon).

Figures

FIGURES 202 – 208. Agyneta bucklei n. sp. 202 – 205, Male. 206 – 208, Female. 202. Palp, retrolateral view. 203. Palp, prolateral view. 204. Embolus, prolateral view. 205. Radical division, retrolateral view. 206. Epigynum, ventral view. 207. Internal genitalia, ventral view. 208. Internal genitalia, dorsal view.