Drusus discolor Rambur, 1842

Vitecek, Simon, Kucinic, Mladen, Olah, Janos, Previsic, Ana, Balint, Miklos, Keresztes, Lujza, Waringer, Johann, Pauls, Steffen U. & Graf, Wolfram, 2015, Description of two new filtering carnivore Drusus species (Limnephilidae, Drusinae) from the Western Balkans, ZooKeys 513, pp. 79-104 : 85-86

Taxon classification Animalia Trichoptera Limnephilidae

Drusus discolor Rambur, 1842 Fig. 5

Material examined.

3 males: France, Mt. Canigou; N42.4864, E2.4139; leg. Graf; 12.VII.2012; in coll. WG. 2 males: France, St. Pierre de la Martin; N42.9597, E0.8290; leg. Graf; 22.VII.2012; in coll. WG. 7 males: Austria, Gurkursprung; leg. Wieser; 13.VII.1997; in coll. WG. 22 males: Switzerland, Val Munstair; N46.5852, E10.4544; leg. Graf; 20.VII.2006; in coll. WG. 1 male: Montenegro, Brodavac, right tributary of Peručica; N42.6859, E19.7364; leg. A. Previšić; 10.VII.2013; in coll. AP.

Type locality.

France, Rhône-Alpes, Haute-Savoie, Chamonix valley.

Description.

Adults. Habitus fawn to brown; sternites and tergites fawn to brown; cephalic and thoracic setal areas pale; cephalic, thoracic and abdominal setation blond; legs fawn, proximally darker; haustellum and intersegmental integument pale, whitish; wings blond-brown, with blond-brown setae on veins and blond setae on membrane. Male maxillary palp 3-segmented; forewing length 12-15 mm, spur formula 1 –3– 3.

Male genitalia (Fig. 5). Tergite VIII light brown, setation scarce, in lateral view with distinct cranial dorsal protuberance; spinose area in lateral view with distinct dorsal protrusion and dorsomedial caudal protrusion, in dorsal view suboval, caudally straight; flanked by membraneous, less sclerotized areas. Segment IX in lateral view ventrally distinctly concave distally; in caudal view dorsally approximately as wide as ventrally; with a distinct, caudally straight rounded protrusion indorsal half (best seen in ventral view). Superior appendages in lateral view suboval, curved obtusely caudad in proximal half, proximal half with distinct dorsal protrusion, approximately as long as high; in dorsal view medially concave; medial transverse section suboval. Intermediate appendages in lateral view medially approximately straight, dorsally with rounded, rough tip; in dorsal view tips separate, oval, distally converging; in caudal view approximately triangular with dorsally diverging tips. Inferior appendages in lateral view conical; in ventral and dorsal views with distinct medial protrusion and distinct notch; in ventral view with longitudinal groove delimiting medial lobe. Parameres simple with single bulbously based tine in distal third.

Female depicted by Schmid (1956), Malicky (2004); larva in key presented by Waringer and Graf (2011), Vitecek et al. (in press); pupa unknown.

Distribution.

This species is one of the most widespread Drusinae species, covering all major European mountain ranges from the Carpathians to the Pyrenees (ecoregions 1-10) (Fig. 11).