Agyneta aquila, 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 : 24

Agyneta aquila new species

Figs 86–89 , map 1

Type material: Male holotype from Canada, Yukon Territory, Eagle River, 23.vi-01.vii.1981, pitfalls in spruce bog, C.D. Dondale ( CNC). EXAMINED.

Etymology: The specific name is a noun in apposition signifying eagle, in reference to the type locality, Eagle River in Yukon Territory.

Diagnosis: Males can be differentiated from all Agyneta species by their bifid lamella characteristica with deep disjunction ( Fig. 86 ). From A. olivacea , A. watertoni by the large thumb-shaped ventral cymbial tubercle ( Fig. 87 ), triangular in A. olivacea and A. watertoni ( Figs 73 , 105 ).

Description: Male: Total length 1.45; carapace length 0.69, width 0.57.

CEPHALOTHORAX: Carapace light yellow, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum yellow suffused with dark gray. Clypeus height 5. Chelicerae light yellow-brown with transverse gray band, excavated; fangs thick and wide; seta-tipped tubercles absent; promargin one tiny denticle, retromargin 0 denticles, both margins without projections near base of fang. Cheliceral stridulatory organ ~51 striae, narrowly spaced throughout. ABDOMEN: Uniformly light gray. LEGS: Yellow; leg I total length: 1.94; Tm I: 0.85, Tm IV: present. GENITALIA: Palpal retrolateral tibial apophysis rounded, smooth; dorsal tibial apophysis rugose; one retrolateral and one dorsal trichobothria ( Fig. 86 ). Cymbium triangular, glabrous depression present ( Fig. 86 ); dorsal cymbial tubercle absent; ventral tubercle large, rounded and smooth; prolateral notch medium ( Fig. 87 ). Paracymbium apical pocket long, anterior pocket curved making a small cover, posterior pocket small and pointed ( Fig. 86 ). Embolus tip pointed, with extension retrolaterally; basal flange with two sharp points; basally with a few spikes; Fickert’s gland elongated, situated medially; ventral lamella serrated, pointed; thumb reaching below the embolus proper ( Fig. 88 ). Embolus proper set apically, ventral part slightly wider ( Fig. 88 ). Anterior terminal apophysis tip wide with a few, short protrusions; posterior terminal apophysis extremely wide, twisted; lamella characteristica large, with two large prongs and a large serrated lamella ( Fig. 89 ).

Female: Unknown.

Other material examined: CANADA: British Columbia: Summit lake, 01.vi–08.vii.1981, pitfalls in moss above tree line, 13, C. Dondale ( CNC).

Distribution: Northwest Canada.

Figures

FIGURES 86 – 89. Agyneta aquila n. sp. 86 – 89, Male. 86. Palp, retrolateral view. 87. Palp, prolateral view. 88. Embolus, prolateral view. 89. Radical division, retrolateral view.

FIGURES 72 – 78. Agyneta olivacea (Emerton 1882). 72 – 75, Male. 76 – 78, Female. 72. Palp, retrolateral view. 73. Palp, prolateral view. 74. Embolus, prolateral view. 75. Radical division, retrolateral view. 76. Epigynum, ventral view. 77. Internal genitalia, ventral view. 78. Internal genitalia, dorsal view.

FIGURES 104 – 107. Agyneta watertoni n. sp. 104 – 107, Male. 104. Palp, retrolateral view. 105. Palp, prolateral view. 106. Embolus, prolateral view. 107. Radical division, retrolateral view.