Drusus meridionalis Kumanski, 1973

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 : 87-90

Taxon classification Animalia Trichoptera Limnephilidae

Drusus meridionalis Kumanski, 1973 Fig. 7

Material examined.

10 males: Bulgaria, Vihren, Pirin Mountains, Okotovo-Banserishka, marshy spring; N41.7389, E23.4462; leg. Keresztes, Török, Kolcsár; 23.VIII.2013; in coll WG.

Type locality.

Bulgaria, Rila and Pirin Mountains.

Description.

Adults. Habitus yellow to brown; sternites and tergites yellow to brown; cephalic and thoracic setal areas pale; cephlic and thoracic setation blond, abdominal setation scarce, short, dark; legs yellow to light brown, proximally darker; haustellum and intersegmental integument pale, whitish; wings yellow to fawn, with blond setae on veins and membrane. Male maxillary palp 3-segmented. Forewing length 12-14 mm; spur formula 1 –3– 3.

Male genitalia (Fig. 7). Tergite VIII yellow to brown, setae absent; spinose area in lateral view approximately flat, in dorsal view suboval, somewhat rectangular cranially; flanked by membraneous, less sclerotized area bearing single seta. Segment IX in lateral view ventrally slightly concave distally; in caudal view wider ventrally than dorsally; with distinct, approximately triangular, rounded protrusion in dorsal half (best seen in dorsal view). Superior appendages in lateral view suboval, curved obtusely caudad in proximal third, proximally with distinct dorsal protrusion, longest in anterioposterior axis: approximately 3 times longer than high; in dorsal view proximally slightly concave medially; medial transverse section oval. Intermediate appendages in lateral view with rounded, rough tip; in dorsal view 2 separate parallel tips, each oval, rough; in caudal view subtriangular, dorsally with 2 separate tips. Inferior appendages in lateral view conical; in ventral and dorsal views slender with minute subtriangular medial protrusion and shallow notch; in ventral view with longitudinal groove delimiting medial lobe. Parameres simple, with single, bulbously based tine in distal third.

Female depicted by Kumanski (1973), Malicky (2004); larva in key presented by Vitecek et al. (in press); pupa unknown.

Distribution.

Regionally in the Eastern Balkans (ecoregion 7) (Fig. 11).

Comments.

This species was first described as a subspecies of Drusus romanicus , but was elevated to species rank ( Vitecek et al. in press). It is morphologically distinct from Drusus romanicus , disjunct in distribution, and was recovered as a well-separated clade from Drusus romanicus in the phylogenetic analyses of Pauls et al. (2009) and Vitecek et al. (in press).