Palliduphantes istrianus (Kulczyński, 1914)

Bosmans, Robert & Trotta, Alessio, 2021, On two rare Italian Palliduphantes, including the description of a new species (Araneae: Linyphiidae), Fragmenta entomologica 53 (1), pp. 9-12 : 10

Palliduphantes istrianus (Kulczyński, 1914)

( Figs 3a–k )

cave] (N40°45’45’’ E15°06.0084), 1125 m, 28.XII.2015, L. Petruzziello leg.; paratypes: 3 ♂♂, 1 ♀, same data as holotype ; holotype and paratypes deposited in MCSNV (abdomen of female paratype accidently lost after making photos and drawings).

Diagnosis. Males are easily distinguished from other Palliduphantes species by the unique disposition of the 5 sharply pointed terminal teeth of the lamella caracteristica as seen in ventral view ( Fig. 1e ). The epigyne of the female resembles that of P. pallidus , but in this species the scape is much more flattened in lateral view and the dorsal plate is as long as wide, twice as long as wide in P. petruzzielloi sp. n. ( Figs 1i , 2d ).

Description. Measurements (mm): Male (n=4): Total length

1.9–2.0; prosoma 0.81–0.83 long, 0.70–0.71 wide. Female

(n=1): Total length 2.2; prosoma 0.89 long, 0.72 wide.

- Colour: Prosoma, sternum and legs pale yellow; eyes with narrow black rings in males, missing in the single female; diameter.

- Eyes: AM separated by 1/4 their diameter, from the AL by the diameter of the AL; PM separated by their diameter, from the PL by 3/4 their diameter.

- Chelicerae with about 20 stridulating ridges; fang groove with 3 large promarginal and 5 small, closely set retromarginal teeth.

- Spination: Fe I with one prolateral spine; Tibiae I–II with 2 dorsal and 1 retrolateral spine, Ti III–IV only with

Figures

Fig. 3 – Palliduphantes istrianus (Kulczyński). a, male, dorsal view; b, idem, frontal view; c, female, dorsal view; d, idem, ventral view; e, male palp, retrolateral view; f, idem, ventral view; g, idem, prolateral view; h, idem, dorsal view; i, epigyne, ventral view; j, idem, dorsal view; k, idem, lateral view. Scale bars: a, c–d: 0.5 mm; e–h: 0.1 mm; b, i–k: 0.2 mm.

Fig. 1 – Palliduphantes petruzzielloi sp. n. a, holotype male, habitus in dorsal view; b, female paratype, habitus in dorsal view; c, holotype male, prosoma in frontal view; d, holotype male, palp, retrolateral view; e, idem, ventral view; f, idem, prolateral view; g, idem, dorsal view; h, female paratype, epigyne, ventral view; i, idem, dorsal view; j, idem, lateral view. Scale bars: a= 0.5 mm; b =1 mm; c= 0.2 mm; d–j =0.2 mm.

Fig. 2 – Palliduphantes petruzzielloi sp. n. a, holotype male, palp, retrolateral view; b, idem, embolic division, prolateral view; c, female paratype, epigyne, ventral view; d, idem, dorsal view; e, idem, lateral view. Scale bar: a–e: 0.18 mm.