Agyneta delphina, 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 : 156-158

Agyneta delphina new species

Figs 511–519 , map 34

Type material: Male holotype and female allotype from California, 5 mi south Monticello, 38.30N, 122.12W, January 6, 1957, R. O. Schuster coll. ( AMNH). EXAMINED.

Etymology: The specific name is a noun in apposition referring to the shape of the embolus, similar to a dolphin.

Diagnosis: Males and females can be diagnosed by their dark gray abdomen with white apical mark ( Figs 515, 516 ). Additionally, males are diagnosed from all other species in the genus by their pointed, sharp basal flange of the embolus ( Fig. 512 arrow). Females are distinguished from most species by their narrow proximal part of scape with parallel sides ( Fig. 517 ). From A. darrelli by their broad median part of scape ( Fig. 519 ), narrow in the latter ( Fig. 193 ) and from A. bucklei by the pointed tip of the lateral lobes ( Fig. 519 arrow), rounded in the latter ( Fig. 207 )

Description: Male: Total length 1.39; carapace length 0.70, width 0.58.

MAP. 34. Localities of Agyneta delphina n. sp.

CEPHALOTHORAX: Carapace light orange, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum orange-brown strongly suffused with dark gray. Clypeus height 2. Chelicerae light yellow-orange, with transverse suffused dark gray band, not excavated; seta-tipped tubercles absent; promargin five teeth, retromargin five denticles, no projection near base of fang. Cheliceral stridulatory organ ~54 striae, apical half widely spaced basal half very narrowly spaced. ABDOMEN: Dark gray with white apical hourglass-shaped mark ( Fig. 515 ). LEGS: Yellow; femurs, metatarsus I lightly suffused with gray, leg I total length: 3.13, leg III total length: 2.11, Tm I: 0.24, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis small, pointed; dorsal tibial apophysis rugose, lip-like; two trichobothria retrolaterally, one dorsally ( Fig. 511 ). Cymbium rounded; glabrous depression absent ( Fig. 511 ); cymbial tubercles absent; prolateral notch shallow ( Fig. 512 ). Paracymbium apical pocket very short, anterior pocket short and strongly curved making a medium cover, posterior pocket absent ( Fig. 511 ). Embolus tip pointed; basally with large flange; Fickert’s gland absent; ventral lamella absent; thumb short, reaching below the embolus proper ( Fig. 513 ). Embolus proper set apically, dorsal part tiny ( Fig. 513 ). Anterior terminal apophysis pointed, tip with long protrusions; posterior terminal apophysis small, twisted; lamella characteristica small, ending in a sharp point ( Fig. 514 ).

Female: Total length 1.97; carapace length 0.76, width 0.65.

CEPHALOTHORAX: Coloration as in male. Clypeus height 2. Chelicerae orange with dark transverse band; promargin four teeth, retromargin four denticles. Cheliceral stridulatory organ ~55 striae, apical half widely spaced, basal half very narrowly spaced. ABDOMEN: Patterned, dark gray with off-white apical mark band ( Fig. 516 ). LEGS: Same coloration as male; palpal tibia and tarsus segments dark, claw absent; leg I total length: 3.45, leg III total length: 2.28, Tm I: 0.26, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape medium with parallel sides; epigynal slits oval; pit hook depression shallow ( Fig. 517 ); lateral lobes long and folded; stretcher medium; pit deep ( Fig. 518 ). Median part of scape short and wide; genital pores situated at the base of the lateral lobes ( Fig. 519 ). Internal genitalia with large rounded receptacula ( Figs 518, 519 ).

Other material examined: USA: California: 6.4km N St. Helena, 31.xii.1953, 1Ƥ, G. Marsh, R. Schuster, V. Roth ( AMNH); 8km S Monticello, 06.i.1957, 131Ƥ, R. Schuster ( AMNH); 14km S Monticello, 19.i.1958, 1Ƥ, R. Schuster ( AMNH); Black Mountain, 17km SE Willow Springs, 21–26.x.1999, pitfall, 23, N. Rappaport ( DUC); Mill Valley, 15.i.1961, Arctosaphylos duff, 33, C. O’Brien ( AMNH); Petrified Forest, 21.xi.1953, 13, J. Heifer ( AMNH); Pinnacles National Monument, 23.ii.1956, 1Ƥ, G. Marsh ( AMNH); Yosemite Park, Wawona Camp, 17.ix.1941, 33 ( AMNH). Oregon: 32km NE Ashland, 01.ix.1959, 1Ƥ, W. Gertsch, V. Roth ( AMNH); Jenny Creek, Medford district, pitfall, 13 ( DBC).

Distribution: Southwestern USA.

Figures

FIGURES 511 – 519. Agyneta delphina n. sp. 511 – 515, Male. 516 – 519, Female. 511. Palp, retrolateral view. 512. Palp, prolateral view (arrow point to sharp basal flange). 513. Embolus, prolateral view. 514. Radical division, retrolateral view. 515. 516. Abdomen, dorsal view. 517. Epigynum, dorsal view. 518. Internal genitalia, ventral view. 519. Internal genitalia, dorsal view (arrow points to pointed tip of lateral lobe).

FIGURES 185 – 194. Agyneta darrelli n. sp. 185 – 189, Male. 190 – 194, Female. 185. Palp, retrolateral view. 186. Palp, prolateral view. 187. Embolus, prolateral view. 188. Radical division, retrolateral view. 189. 190. Abdomen, dorsal view. 191. Epigynum, ventral view. 192. Internal genitalia, ventral view. 193. Internal genitalia, dorsal view. 194. Distal part of scape, posterior view (arrow points to the connection between the stretcher and the lateral lobe).

FIGURES 202 – 208. Agyneta bucklei n. sp. 202 – 205, Male. 206 – 208, Female. 202. Palp, retrolateral view. 203. Palp, prolateral view. 204. Embolus, prolateral view. 205. Radical division, retrolateral view. 206. Epigynum, ventral view. 207. Internal genitalia, ventral view. 208. Internal genitalia, dorsal view.