Trebacosa Dondale & Redner, 1981

Szűts, Tamás, Zalai, Béla, Villepoux, Olivier, Buchholz, Sascha, Eichardt, János, Zhukovets, Evgeni, Oger, Pierre & Szinetár, Csaba, 2017, On the identity of the Palearctic species of the wolf spider genus Trebacosa (Araneae: Lycosidae), Zootaxa 4216 (4), pp. 384-394 : 385

Trebacosa Dondale & Redner, 1981

Type species: Pirata marxi Stone, 1890

Differential diagnosis (see Dondale & Redner (1981) for the full diagnosis). Carapace with a characteristic pattern ( Figs 1 , 5–7 ): three parallel white lines, which do not touch. This is similar to those of Pirata Sundevall, 1833 , but those have the white line converging in the thoracic region. The short sperm ducts are similar in the genera Pirata , Piratula Roewer, 1960 and Trebacosa . Females of Trebacosa can be distinguished from those of Pirata and Piratula by the position of the vulval chamber relative to the head of spermatheca ( Figs 9, 16 , 21 ). In Trebacosa , the HS is ectal and the VC is mesal, whereas in Piratula and Pirata the HS is positioned mesal relative to the VC. Trebacosa is seemingly unique by possessing the primary pores at the basis of the HS (Luis Piacentini – pers comm.). Males of Trebacosa can be recognized by the large angular median apophysis ( Dondale & Redner 1981, Dondale 2005).

Figures

FIGURES 1 – 4. Female of Trebacosa marxi (Stone, 1890). 1 habitus, dorsal view; 2 epigyne, ventral view; 3 cleared epigyne, ventral view; 4 vulva, dorsal view. Scale bars are 1.0 mm for habitus, 0.25 mm for vulva images.

FIGURES 5 – 7. Trebacosa europaea Szinetár & Kancsal, 2007. 5 female from Hungary, from the type locality, habitus, dorsal view; 6 female from Greece, dorsal view; 7 female from France, dorsal view. Scale bars are 1.0 mm.

FIGURES 8 – 18. Trebacosa europaea Szinetár & Kancsal, 2007 female genitalia. 8 – 9. Diagnostic drawings of a female from the type locality: 8 epigyne, ventral view, 9 vulva, dorsal view. 10 – 18. Comparision images from different localities. 10 – 12, 16. Female from Hungary, type locality: 10 epigyne, ventral view, 11 cleared epigyne, ventral view, 12 vulva, dorsal view, 16 vulva, dorsal view, via compound microscope, 13 – 15. Female from Greece: 13 epigyne, ventral view, 14 cleared epigyne, ventral view, 15 vulva, dorsal view, 17 – 18. Female from France: 17 cleared epigyne, ventral view; 18 female vulva, dorsal view.

FIGURES 19 – 22. SEM images of Trebacosa europaea Szinetár & Kancsal, 2007 female genitalia from the type locality, Hungary. 19 epigyne, ventral view; 20 vulva, dorsal view; 3 left structures, dorsal view; 4 closeup of the pores on the head of spermatheca, dorsal view.