Agyneta flibuscrocus, 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 : 148-149

Agyneta flibuscrocus new species

Figs 481–484 , map 32

Type material: Male holotype and male paratype from Wyoming, Yellowstone National Park, Mt. Washburn N of Summit, 44º19’N, 110º25’W, August 13, 1940, Wilton Ivie ( AMNH). EXAMINED. Etymology: Specific epithet is an arbitratry composition of letters.

Diagnosis: Males are diagnosed from all Agyneta by the presence of a prong on the paracymbium ( Fig. 481 arrow).

Description: Male: Total length 2.35; carapace length 1.04, width 0.85.

CEPHALOTHORAX: Carapace dark orange-brown, shiny, finely reticulate; suffused with dark gray along margin and radiating lines; trident mark present. Sternum suffused with dark gray. Clypeus height 2.5. Chelicerae orange-brown, with transverse gray band; not excavated; seta-tipped tubercles absent; promargin four teeth, retromargin two denticles. Cheliceral stridulatory organ ~25 strong striae, well spaced throughout. ABDOMEN: Uniformly dark gray. LEGS: Light orange; leg I total length: 4.80; leg III total length: 3.59; Tm I: 0.22, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis rounded smooth; dorsal tibial apophysis absent, tibia rugose dorsally; two retrolateral trichobothria and one dorsal ( Fig. 481 ). Cymbium rounded; glabrous depression present ( Fig. 481 ); dorsal cymbial tubercle triangular, smooth; ventral cymbial tubercle absent; prolateral notch shallow ( Fig. 481 ). Paracymbium apical pocket medium, anterior pocket absent, bearing an anterior prong, posterior pocket absent ( Fig. 481 ). Embolus tip pointed and wide with large prong retrolaterally; basally enlarged with two small spines; Fickert’s gland absent; ventral lamella transparent, few spines basally; thumb long reaching over the embolus proper ( Fig. 483 ). Embolus proper set apically on a vertical ridge, not associated with embolus tip, of equal part ( Fig. 483 ). Anterior terminal apophysis narrow tip with long protrusions; posterior terminal apophysis pointed, not well sclerotized; lamella characteristica with three sharp prongs ( Fig. 484 ).

Female: Unknown.

Other material examined: One male collected with the type.

Distribution: Western USA, Wyoming.

Figures

FIGURES 481 – 484. Agyneta flibuscrocus n. sp. 481 – 484, Male. 481. Palp, retrolateral view (arrow points to paracymbial prong). 482. Palp, prolateral view. 483. Embolus, prolateral view. 484. Radical division, retrolateral view.