Agyneta dynica Saaristo & Koponen 1998

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 : 47-48

Agyneta dynica Saaristo & Koponen 1998

Figs 137–143 , map 6

Agyneta dynica Saaristo & Koponen 1998: 581 , f. 13A–D, 14A–D. (Description Ƥ).

Type material: Agyneta dynica Saaristo & Koponen 1998 , 3 HOLOTYPE from Canada: Nouveau-Québec, Kuujjuarapik, 6.6.– 17.8.1990, inland dyne, S. Koponen (MUS. Zool Turk AM629) deposited in AMNH. EXAMINED.

Diagnosis: Males are distinguished from all Agyneta species by their long, sinuous and narrow lamella characteristica with blunt tip ( Fig. 137 ). Females are distinguished from most Agyneta by their deep pit hook depression ( Fig. 141 ). From closely related species by the slightly oblique sides of the proximal part of scape ( Fig. 141 ), strongly oblique in A. nigripes ( Fig. 127 ) and straight A. rurestris , A. jacksoni and A. maritima ( Figs 112 , 120 , 134 ).

Description: Male: Total length 1.71; carapace length 0.75, width 0.61.

CEPHALOTHORAX: Carapace brown, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum brown strongly suffused with dark gray. Clypeus height 1. Chelicerae orange-brown, apical part lighter, excavated; seta-tipped tubercles absent; promargin three denticles, retromargin two denticles; without projections near base of fang. Cheliceral stridulatory organ ~38 striae, well spaced gradually getting closer. ABDOMEN: Uniformly dark gray. LEGS: Yellow-orange, leg I total length: 2.22; leg III total length: 1.82; Tm I: 0.28, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis absent; dorsal tibial apophysis absent; two retrolateral trichobothria and a dorsal one ( Fig. 137 ). Cymbium truncated; glabrous depression present ( Fig. 137 ); dorsal cymbial tubercle absent; ventral cymbial tubercle smooth, elongated and rounded; prolateral notch shallow ( Fig. 138 ). Paracymbium apical pocket short, anterior pocket curved and short, posterior pocket absent ( Fig. 137 ). Embolus tip pointed, with large prong; basally with large flange; Fickert’s gland absent; ventral lamella wide, apically serrated; thumb short reaching well below the embolus proper ( Fig. 139 ). Embolus proper very large, set apically, dorsal part wide, serrated ( Fig. 139 ). Anterior terminal apophysis wide with long protrusions; posterior terminal apophysis wide, twisted medially, striated; lamella characteristica large, margin with row of spurs, ending in two rounded points ( Fig. 140 ).

Female: Total length 2.14; carapace length 0.78, width 0.78.

CEPHALOTHORAX: Same coloration as male. Chelicerae yellow; promargin 3 teeth, retromargin four denticles. Cheliceral stridulatory organ visible ~32 striae, well spaced. ABDOMEN: Same as male. LEGS: Same as male; palpal tarsal claw absent; leg I total length: 2.78; leg III total length: 2.07; Tm I: 0.28, Tm IV: absent. GENITALIA: Epigynum with wide proximal part of scape, sides very slightly oblique; epigynal slits oval and short; pit hook depression deep ( Fig. 141 ); lateral lobes wide and short; stretcher seemingly absent; pit medium ( Fig. 142 ). Median part of scape long and wide with constriction; genital pores situated at base of lateral lobes pockets ( Fig. 143 ). Internal genitalia with oval ventral receptacula ( Figs 142, 143 ).

Other material examined: CANADA: Québec: Nouveau-Québec, Kuujjuarapik, 6.6.– 17.8.1990, inland dyne, 1Ƥ, S. Koponen (allotype, MUS. Zool Turk AM639) ( AMNH); Great Whale River, 15.vi.1949, 132Ƥ, J. Vockeroth ( CNC). USA: Colorado: Loveland Pass, 3505m, 26.vii.1966, tree-line area, 13, R. Shmoller ( AMNH). Distribution: Northeastern Canada and one isolated locality at high elevation in Colorado.

Figures

FIGURES 137 – 143. Agyneta dynica Saaristo & Koponen 1998. 137 – 140, Male. 141 – 143, Female. 137. Palp, retrolateral view. 138. Palp, prolateral view. 139. Embolus, prolateral view. 140. Radical division, retrolateral view. 141. Epigynum, ventral view. 142. Internal genitalia, ventral view. 143. Internal genitalia, dorsal view.

FIGURES 123 – 129. Agyneta nigripes (Simon 1884). 123 – 126, Male. 126 – 129, Female. 123. Palp, retrolateral view. 124. Palp, prolateral view. 125. Embolus, prolateral view. 126. Radical division, retrolateral view. 127. Epigynum, ventral view. 128. Internal genitalia, ventral view. 129. Internal genitalia, dorsal view.

FIGURES 108 – 115. Agyneta rurestris (C. L. Koch 1836). 108 – 111, Male. 112 – 115, Female. 108. Palp, retrolateral view. 109. Palp, prolateral view. 110. Embolus, prolateral view. 111. Radical division, retrolateral view. 112. Epigynum, ventral view. 113. Internal genitalia, ventral view. 114. Internal genitalia, dorsal view. 115. Internal genitalia, lateral view.

FIGURES 116 – 122. Agyneta jacksoni (Braendegaard 1937). 116 – 119, Male. 120 – 122, Female. 116. Palp, retrolateral view. 117. Palp, prolateral view. 118. Embolus, prolateral view. 119. Radical division, retrolateral view. 120. Epigynum, ventral view. 121. Internal genitalia, ventral view. 122. Internal genitalia, dorsal view.

FIGURES 130 – 136. Agyneta maritima (Emerton 1919). 130 – 133, Male. 134 – 136, Female. 130. Palp, retrolateral view. 131. Palp, prolateral view. 132. Embolus, prolateral view. 133. Radical division, retrolateral view. 134. Epigynum, ventral view. 135. Internal genitalia, ventral view. 136. Internal genitalia, dorsal view.