Architis dianasilvae, Santos, 2007

Santos, Adalberto J., 2007, A revision of the Neotropical nursery-web spider genus Architis (Araneae: Pisauridae), Zootaxa 1578 (1), pp. 1-40 : 20-21

Architis dianasilvae sp. nov.

Figures 8E–F , 11

Type material. Holotype: female, Quebrada Chispa , Huancabamba, Department of Pasco, Peru, 10º10’S, 75º15’W, 28 October 1986, D. Silva ( MUSM).

Etymology. The specific name honors the collector of the type specimen, the arachnologist Diana Silva Dávila, in recognition of her efforts in studying the Peruvian spider fauna.

Diagnosis. Architis dianasilvae sp. nov. shares with A. cymatilis the shape of the CD, which are encapsulated in large, sausage-shaped sclerotised cases ( Figs 3D , 8F ), but can be distinguished by a wide transverse keel in the anterior half of the epigynum, covering the copulatory openings ( Fig. 8E ).

Description

Male. Unknown.

Female ( based on holotype from Quebrada Chispa , Peru)

Carapace reddish-brown, dark brown medially and marginally. Anterior eye row procurved, lateral eyes strongly projected ventrally and almost twice as large as medians. Posterior eyes of similar size. Clypeus cream-coloured, chelicerae reddish-brown. Eye sizes and arrangement as in A. cymatilis (see Carico 1981; fig. 11). Sternum cream-coloured, with marginal brown spots at the base of coxae. Labium and endites reddishbrown. Pedipalpi and legs reddish-brown. Opisthosoma dark gray dorsally, with darker spots. Venter and sides cream-coloured, with dark spots. Spinnerets reddish-brown. Total length 4.7; carapace 1.8 long, 1.7 wide. Tibia I length 3.2, II 3.4, III 2.5, IV 2.9. Opisthosoma 2.8 long, 1.5 wide. Epigynal MF projected posteriorly over epigastric furrow ( Fig. 8E ).

Distribution. Known only from the type locality in northern Peru ( Fig. 11 ).

Figures

FIGURES 3A–D. Architis cymatilis Carico. A, male pedipalpus, ventral view; B, male pedipalpus, lateral view; C, female epigynum, ventral view; D, female internal genitalia, dorsal view. Scale bars: A–B, 0.2 mm; C–D, 0.1 mm.

FIGURES 8A–F. Architis spp. A–B, A. ikuruwa Carico: A, female epigynum, ventral view; B, female internal genitalia, dorsal view. C–D, A. altamira sp. nov.: C, female epigynum, ventral view; D, female internal genitalia, dorsal view. E–F, A. dianasilvae sp. nov.: E, female epigynum, ventral view; F, female internal genitalia, dorsal view. Arrows point to the copulatory opening. Scale bars: 0.1 mm.

FIGURE 11. Geographic distribution records of Architis comaina sp. nov. (empty circle), A. ikuruwa Carico (cross), A. altamira sp. nov. (full triangle), A. dianasilvae sp. nov. (full circle), Architis tenuipes (Simon) (empty square) and A. turvo sp. nov. (empty triangle).