Agyneta ordinaria ( Chamberlin & Ivie 1947 )

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 : 145-148

Agyneta ordinaria ( Chamberlin & Ivie 1947)

Figs 474–480 , map 32

Meioneta ordinaria Chamberlin & Ivie 1947: 59 , f. 74–75. (Description Ƥ). Agyneta ordinaria Buckle et al. 2001: 101 . (Transferred from Meioneta ).

Type material: Meioneta ordinaria Chamberlin & Ivie 1947 , Ƥ HOLOTYPE from Alaska, Haines, August 25, 1945, J.C. Chamberlin ( AMNH). Not found, NOT EXAMINED.

Diagnosis: Males are distinguished from all Agyneta species by their extremely long ventral cymbial tubercle ( Fig. 475 ). Females are distinguished from most species by the parallel sides of the proximal part of scape ( Fig. 478 ), from A. manni by their rounded receptacula ( Fig. 480 ), elongated in the latter ( Fig. 490 ).

Description: Male: Total length 1.79; carapace length 0.83, width 0.64.

CEPHALOTHORAX: Carapace dark orange-brown, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum orange-brown suffused with dark gray. Clypeus height 2. Chelicerae orange-brown, with transverse gray band, excavated; ~15 seta-tipped tubercles; promargin four teeth, retromargin four denticles, both margins with rounded projections near base of fang. Cheliceral stridulatory organ ~30 strong striae, well spaced, gradually getting closer basally. ABDOMEN: Uniformly dark gray. LEGS: Orange, patella and tarsus light orange; leg I total length: 3.02; leg III total length: 2.22; Tm I: 0.20, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis pointed, rugose; dorsal tibial apophysis absent; two retrolateral trichobothria and one dorsal ( Fig. 474 ). Cymbium triangular; glabrous depression present ( Fig. 474 ); dorsal cymbial tubercle small, rounded; ventral tubercle elongated, rounded and rugose; prolateral notch shallow ( Fig. 475 ). Paracymbium apical pocket short, anterior pocket curved making a large cover, posterior pocket absent ( Fig. 474 ). Embolus tip pointed; Fickert’s gland elongated situated medially; ventral lamella transparent, spiny; thumb short, reaching below the embolus proper ( Fig. 476 ). Embolus proper set apically, of equal part, associated with embolus tip ( Fig. 476 ). Anterior terminal apophysis with wide tip with a few protrusions; posterior terminal apophysis small, not well sclerotized; lamella characteristica large, with two fold, one small, serrated and one with pointed tip ( Fig. 477 ).

Female: Total length 1.78; carapace length 0.74, width 0.58.

MAP. 32. Localities of Agyenta ordinaria ( Chamberlin & Ivie 1947) , Agyneta flibuscrocus n. sp., Agyneta angulata ( Emerton 1882) , Agyneta leucophora ( Chamberlin & Ivie 1944) .

CEPHALOTHORAX: Same coloration as male. Chelicerae yellowish; promargin four teeth, retromargin one denticle. Cheliceral stridulatory organ ~26 striae, well spaced slowly getting closer basally. ABDOMEN: Same as male. LEGS: Same as male; palpal claw absent; leg I total length: 2.81; leg III total length: 2.19; Tm I: 0.23, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape wide, sides parallel; epigynal slits small; pit hook depression deep ( Fig. 478 ); lateral lobes medium; stretcher indiscernible; pit deep ( Fig. 479 ). Median part of scape long, narrow; genital pores situated at base of lateral lobes pockets ( Fig. 480 ). Internal genitalia with large, rounded receptacula ( Figs 479, 480 ).

Other material examined: CANADA: Alberta: Waterton Lakes National Park, 1584m, pitfalls in lodgepole pine and aspen forest, burned and unburned, 26.vi–03. vii.2000, 23, 27.vi–04.vii.2000, 33, 31.vii–07. viii.2000, 13, 28.viii–11. ix.2000, 13, E. Kinsella ( DBC); Waterton Lakes National Park, waterton River, 07–11.vi.1980, aspen grove, 1Ƥ, I. Smith ( CNC). British Columbia: Manning Provincial Park, 19.vi–04.vii.1979, pitfall in shrubs at edge of beaver pond, 1132Ƥ, 20.vi–03.vii.1979, pitfall in rhododendron flat, 53, C. Dondale ( CNC); Mount Cain, pan trap, 10.viii.1996, 13, 27.viii.1996, 13, N. Winchester ( DBC); Pinkut Creek, Babine Lake, 14.viii.1998, moss litter, 133Ƥ, R. West ( CNC); Terrace, 0 1–10. vi.1931, 13, M. Hippisley ( AMNH). USA: Washington: Asahel Curtis Trail, 682m, 06.v–13.ix.1995, pitfalls in forest, 23, J. Bergdahl ( UWBM); Denny Creek, Snoqualmie Pass, 16.ix.1935, 332Ƥ, R. Chamberlin, W. Ivie ( AMNH); E of Bean Creek, 1200m, 25.vi–09.vii.1982, pitfalls in volcanic blowdown, 1Ƥ, R. Sugg ( UWBM); E of Lone Tree Mountain, 1121m, 15.vi–02.vii.1983, pitfalls in clearcut, 23, K. Johnson ( UWBM); Muddy River, 1264m, 30.ix–16.x.1981, pitfalls in mudflow, 1Ƥ, D. Mann ( UWBM); N of Butte Camp, 1386m, pitfalls in talus, 15–28. vii.1981, 13, 28.vii–11.viii.1981, 33, 30.vii.1983, 13, D. Mann ( UWBM); N of Hemlock Creek, 1182m, pitfalls in forest, 16.vi–02. vii.1983, 13, 05–23. viii.1983, 13, K. Johnson ( UWBM); Phelps Creek, 838m, 03.vii.1988, willow-alder litter, 1Ƥ, R. Crawford ( UWBM); Scatter Creek, 1024m, 04.vi.1988, moss on forest floor, 1Ƥ, R. Crawford ( UWBM); Upper Rock Rabit Lake, 1274m, 01.vii.2009, white-pine cones, 1Ƥ, L. Ramseyer ( UWBM); W of Badger Peak, 1319m, pitfalls edge of clearcut, 16.vi–02.vii.1983, 53, 04–20. ix.1983, 1 Ƥ, K. Johnson ( UWBM); W of Black Lake, 1330m, pitfalls on hillside, 04.vii–25. x.1995, 13, J. Bergdahl ( UWBM); W side of Lake Kachess, 707m, 10.v.1981, forest floor moss, 1Ƥ, R. Nelson ( UWBM); Waterhole Camp, 1516m, 08.viii.1986, under wood and bark of standing trees, 1Ƥ, R. Crawford ( UWBM).

Distribution: Northwestern Canada and USA.

Notes: Despite the fact that the female holotype was not found, and no specimens from the type locality or from Alaska were studied, I feel confident that the specimen described here represents the right species, based on Chamberlin & Ivie 1947 description and illustrations (figs. 74-75).

Figures

FIGURES 474 – 480. Agyneta ordinaria (Chamberlin & Ivie 1947). 474 – 477, Male. 478 – 480, Female. 474. Palp, retrolateral view. 475. Palp, prolateral view. 476. Embolus, prolateral view. 477. Radical division, retrolateral view. 478. Epigynum, ventral view. 479. Internal genitalia, ventral view. 480. Internal genitalia, dorsal view.

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.