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 Author Dupérré, Nadine text Zootaxa 2013 3674 1 1 189 journal article 10.11646/zootaxa.3674.1.1 9c8e7b58-7cc0-407f-a8e9-d76311dcd290 1175-5326 283954 981F80ED-96D7-40C7-8A3C-677954416A2E Agyneta decora ( O . Pickard-Cambridge 1871 ) Figs 1–12 , 29 a,b–31, 34, 36–41, 64–71, map 1 Neriene decora O . Pickard-Cambridge 1871 : 438 . (Description 3). Microneta decora Simon 1884 : 441 . Microneta clypeata F. O . Pickard-Cambridge 1894 : 90 , pl. 1, f. 5. Microneta passiva O . Pickard-Cambridge 1906 : 77 , 89, pl. 27, f. 22–26. (3, not Ƥ, = Meioneta lugubris ). Agyneta decora Hull 1911 : 583 . (Transferred from Microneta ); Jackson 1912 : 135 , pl. 8, f. 3 (3, description Ƥ). Type material: Neriene decora O . Pickard-Cambridge 1871 , 3 HOLOTYPE from Great Britain , Formby Hall, Liverpool, roots of grass and low plants, O . Pickard-Cambridge 1859, ( OUMNH ), NOT EXAMINED . FIGURES 34–39. 34, 36–39. Agyneta decora (O. Pickard-Cambridge 1871) . 35. Agyneta rurestris (C.L. Koch 1836) . 34 . Palp expanded, prolateral view. 35 . Palp expanded, prolateral view. 36 . Epigynum, ventral view. 37 . Internal genitalia, ventral view. 38 . Internal genitalia, dorsal view. 39 . Internal genitalia, lateral view Diagnosis: Males can be distinguished from all species by the leaf-like shape of the lamella characteristica ( Fig. 64 ). From A. allosubtilis by the larger fused ventral cymbial tubercle ( Fig. 65 ), of equal size in the latter ( Fig. 80 ). Females can be distinguished from most Agyneta by the wide proximal part of scape with long, sinuous sides ( Fig. 68 ). From A. perspicua by the oval receptacula of the internal genitalia ( Fig. 69 ), peanut-shaped in the latter ( Fig. 95 ). Description: Male : Total length 1.9; carapace length 0.83, width 0.70. CEPHALOTHORAX: Carapace orange-brown, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum orange-brown strongly suffused with dark gray. Clypeus height 4. Chelicerae orange-brown, excavated, with transverse gray band; fangs thick and wide ( Fig. 5 ); seta-tipped tubercles absent; promargin two teeth, retromargin one denticle, both margins without projections near base of fang. Cheliceral stridulatory organ ~59 striae, narrowly spaced throughout. ABDOMEN: Uniformly dark gray. LEGS: Yellow, leg I total length: 2.23; leg III total length: 1.79; Tm I: 0.93, Tm IV: present. GENITALIA: Palpal retrolateral tibial apophysis rounded, smooth; dorsal tibial apophysis rugose; one retrolateral, one dorsal trichobothria ( Fig. 64 ). Cymbium triangular; glabrous depression present ( Figs 9 , 64 ), dorsal and ventral cymbial tubercles fused; prolateral notch shallow ( Figs 10 , 65 ). Paracymbium apical pocket short, anterior pocket long and curved, posterior pocket long and straight ( Fig. 64 ). Embolus tip pointed, straight; basally with row of spines; Fickert’s gland absent; ventral lamella pointed apically; thumb reaching below the embolus proper ( Fig. 66 ). Embolus proper set apically, with associated prong ventrally ( Fig. 66 ). Anterior terminal apophysis narrow with few protrusions; posterior terminal apophysis wide, twisted; lamella characteristica large, with numerous small spikes, rounded apically ( Fig. 67 ). Female : Total length 1.63; carapace length 0.72, width 0.62. CEPHALOTHORAX: Same coloration as male. Chelicerae orange, not excavated; promargin four teeth, retromargin five denticles. Cheliceral stridulatory organ ~41 striae, narrowly spaced throughout. ABDOMEN: Same as male. LEGS: Same as male, leg I total length: 2.43; leg III total length: 1.88; palpal tarsal claw absent; Tm I: 0.92, Tm IV: present. GENITALIA: Epigynum with wide proximal part of scape, sides sinuous, tapering apically; epigynal slits very large; pit hook depression shallow ( Fig. 68 ); lateral lobes medium and folded; stretcher and pit small ( Fig. 69 ). Median part of scape long and narrow; genital pores situated at base of lateral lobes pockets ( Fig. 70 ). Internal genitalia with a large, roughly oval ventral receptacula ( Figs 69, 70 ). Other material examined: CANADA : Yukon Territory : km 155 Dempster Hwy., 28.vi–02.vii.1982 , pan trap, 13, D.M. Wood ( CNC ). SWEDEN : Jamtland, Undersaker, 30.vi.1941 , 131Ƥ, A. Holm ( AMNH ). USA : Alaska : North Slope Brgh., Meade River, 96km S Barrow, 11.vii.1978 , 43, 15.vii.1978 , 731Ƥ, B. Vogel ( AMNH ). Distribution: Holarctic (Northwest North America ). Notes: This is the first time that A. decora has been recorded in North America . Both sexes of Old World and New World specimens have been studied and no major morphological differences have been found. MAP. 1. Localities of Agyneta decora ( O . Pickard-Cambridge 1871 ) , A. watertoni n. sp. , A. aquila n. sp.