Agyneta bronx, 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 : 133-134

Agyneta bronx new species

Figs 432–438 , map 29

Type material: Male from New York, Bronx , Van Cortland Park, W73.53:N40.53, 12 April, 1964, Jean and Wilton Ivie ( AMNH). EXAMINED.

Etymology: The specific name is a noun in apposition taken from the type locality, Bronx , New York, USA.

Diagnosis: Males are distinguised from all species by their large double triangular-shaped dorsal cymbial tubercle ( Fig. 433 ), from A. llanoensis by the long, sinuous lamella characteristica ( Fig. 432 ), short in the latter ( Fig. 425 ). Females are diagnosed from all Agyneta by their by the diverging copulatory ducts visible on the proximal part of scape ( Fig. 436 ), from a A. llanoensis , see diagnosis of the latter.

Description: Male: Total length 1.85; carapace length 0.88, width 0.76.

CEPHALOTHORAX: Carapace light yellow, shiny, finely reticulate. Sternum light yellow, slightly suffused with dark gray. Clypeus height 3. Chelicerae light orange, not excavated; seta-tipped tubercles absent; promargin five teeth, retromargin four denticles, retromargin with triangular projection near base of fang. Cheliceral stridulatory organ ~52 strong striae, well spaced, getting closer basally. ABDOMEN: Uniformly offwhite. LEGS: Light yellow; leg I total length: 4.18; leg III total length: 2.32; Tm I: 0.23, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis large, pointed, rugose; dorsal tibial apophysis rugose; two retrolateral trichobothria and one dorsal ( Fig. 432 ). Cymbium triangular; glabrous depression present ( Fig. 432 ); dorsal cymbial tubercle with two triangular tips, rugose; ventral tubercle, rounded and striated; prolateral notch deep ( Fig. 433 ). Paracymbium apical pocket long, anterior pocket long and curved making a small cover, posterior pocket medium ( Fig. 432 ). Embolus tip wide, no retrolateral extension; basally with row of spines; ventrally with numerous small spines; Fickert’s gland globulous situated medially; ventral lamella reduced or absent; thumb going slightly over the embolus proper ( Fig. 434 ). Embolus proper set apically, dorsal part wider, not serrated with associated large dentate prong ( Fig. 434 ). Anterior terminal apophysis wide with numerous, long protrusions and one large spike basally; posterior terminal apophysis short with three spines; lamella characteristica large and elaborate ( Fig. 435 ).

Female: Total length 1.99; carapace length 0.83, width 0.41.

MAP. 29. Localities of Agyneta bronx n. sp., Agyneta paquini n. sp., Agyneta serrata ( Emerton 1909) .

CEPHALOTHORAX: Same coloration as male. Chelicerae yellow; promargin five teeth, retromargin four denticles. Cheliceral stridulatory organ ~37 striae, well spaced getting closer basally. ABDOMEN: Same as male. LEGS: Same as male; palpal claw absent; leg I total length: 4.23; leg III total length: 3.10; Tm I: 0.25, Tm IV: absent. GENITALIA: Epigynum with wide proximal part of scape, slightly enlarging in a plate; epigynal slits elongated, oval; pit hook depression small ( Fig. 436 ); lateral lobes broad and short; stretcher medium; pit deep ( Fig. 438 ). Median part of scape short and wide; genital pores situated at base of lateral lobes pockets ( Fig. 438 ). Internal genitalia with ventral comma-shaped receptacula and a large oval dorsal receptacula ( Figs 437, 438 ).

Other material examined: USA: Missouri: 20km SE Sullivan, Great Scott Cave, 13.ix.1979, 1Ƥ, J. Gardner ( CAS). North Dakota: DSU Research Station, site 2, 23.vi.1992, 13, Mott ( DBC). Nebraska: Lincoln, 1941, 13, M. Hargbaugh ( AMNH). Pennsylvania: 4.8km SO Rector, 27.iv.1967, 13, B. Vogel ( AMNH).

Distribution: Northeastern USA west to North Dakota and Nebraska.

Figures

FIGURES 432 – 438. Agyneta bronx n. sp. 432 – 435, Male. 436 – 438, Female. 432. Palp, retrolateral view. 433. Palp, prolateral view. 434. Embolus, prolateral view. 435. Radical division, retrolateral view. 436. Epigynum, ventral view. 437. Internal genitalia, ventral view. 438. Internal genitalia, dorsal view.

FIGURES 425 – 431. Agyneta llanoensis (Gertsch & Davis 1936). 425. Palp, retrolateral view. 426. Palp, prolateral view. 427. Embolus, prolateral view. 428. Radical division, retrolateral view. 429. Epigynum, ventral view. 430. Internal genitalia, ventral view. 431. Internal genitalia, dorsal view.