Mortoniella dolonis, Blahnik & Holzenthal, 2011

Blahnik, Roger J. & Holzenthal, Ralph W., 2011, Revision of the austral South American species of Mortoniella (Trichoptera: Glossosomatidae: Protoptilinae) 2851, Zootaxa 2851 (1), pp. 1-75 : 16

Mortoniella dolonis , new species

Fig. 6

As discussed under M. albolineata , Mortoniella dolonis belongs to a group of closely related species, including M. albolineata ; M. latispina , n. sp.; and M. teutona . All of these species have the character combination of inferior appendages with a distinct, asymmetrical mesal process, dorsal phallic spine with a depressed, apically rounded, somewhat spatulate apex, and endophallic membrane with membranous lobes. Mortoniella dolonis is most similar to M. albolineata ; in both species the ventral endophallic spine is elongate and prominent, and both species also have paramere appendages that are uniformly narrow throughout their length and also distinctly separated, paired lateral lobes on the endophallic membrane (in addition to a lobe paralleling the dorsal phallic spine). Also, in contrast to M. latispina and M. teutona , males of both M. albolineata and M. dolonis have hind wings densely covered with modified, somewhat flattened and scale-like setae. Mortoniella dolonis differs from M. albolineata in several details, the most diagnostic of which are that the paramere appendages are short and curved apically, rather than elongate and straight, and the endophallic spine is nearly straight and dagger-like, rather than strongly curved. An additional difference is that the dorsolateral processes on the phallicata are more prominent.

Adult. Length of forewing: male 3.2–3.6 mm, female 3.8–4.1 mm. Forewing with forks I, II, and III present, hind wing with fork II only. Spur formula 0:4:4. Overall color, of male, grayish-brown, of female, brown. Legs brown, apices of tarsi whitish, tibial spurs somewhat darker than legs, but not strongly contrasting in color. Wing bar at anastamosis scarcely evident, marked with whitish setae at arculus on anal margin. Setae of forewing dense, decumbent; forewing of female with erect setae along major veins, that of male with slightly widened scale-like setae. Hind wing of male covered with modified scale-like setae.

Male genitalia. Ventral process of segment VI laterally compressed, ventrally projecting, short, wide basally, rounded apically. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin convexly rounded dorsally, narrowing ventrally; segment deeply excised dorsomesally and ventromesally, forming lateral lobes, lobes separated dorsomesally by much less than 1/2 width of segment. Tergum X with shallow V-shaped mesal excision; lateral lobes very weakly developed, apices broadly rounded. Inferior appendages with prominent and somewhat asymmetrically developed ventromesal projection; laterally, on each side, with setose, tapering, dorsally-directed lobes. Mesal pockets of fused inferior appendages with apical processes short, dorsally curved. Paramere appendages short, narrow, uniform in width, upturned apically, apices acute. Dorsal phallic spine, as viewed laterally, more or less uniform in width, gradually upturned in apical 1/2, apex narrowed and acute; in dorsal view, somewhat widened in middle, apex rounded, spatulate (depressed). Phallicata with prominent, sclerotized, dorsolateral processes. Endophallic membrane with membranous dorsal lobe, paralleling dorsal phallic spine, 1 pair of membranous dorsolateral lobes, and sclerotized ventromesal spine; ventromesal spine elongate, nearly straight, apex acute.

Holotype male: BRAZIL: São Paulo: Pedregulho, Riberão São Pedro , 20°09'07"S, 047°30'38"W, 617 m, 16.xi.2003, Holzenthal, Paprocki & Calor ( UMSP000085343 ) (pinned) ( MZUSP).

Paratypes: BRAZIL: Minas Gerais: Córrego da Serra de Ouro Fino, Vale do Tropeiro , 20°12'22"S, 043°38'35"W, 1000 m, 8.x.2000, Paprocki, Salgado & Isaac — 1 male, 1 female (alcohol) ( UMSP) ; São Paulo: same locality and date as holotype — 1 male, 2 females (pinned) ( UMSP) ; 10 males (alcohol) ( MZUSP, UMSP, NMNH) ; Pedregulho, Sitio Bruninho , 20°09'14"S, 047°30'42"W, 630 m, 17.xi.2003, Holzenthal, Paprocki & Calor — 2 males (pinned) ( UMSP) ; Pedregulho , 20°09'07"S, 047°30'38"W, 617 m, 6.x.2000, Paprocki & Froehlich — 1 male, 1 female (pinned) ( UMSP) .

Etymology. This species is named M. dolonis , from the Greek word dolon, a dagger or stiletto, and referring to the nearly straight, dagger-like spine of the endophallic membrane, which helps to distinguish this species from its most closely related congeners.

Figures

FIGURE 6. Mortoniella dolonis, new species, male genitalia: A—lateral; B—segment IX and tergum X, dorsal; C— dorsal phallic spine, paramere appendages, and dorsolateral processes of phallicata, dorsal.