Mortoniella parauna, 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 : 28

Mortoniella parauna , new species

Fig. 13

This is a somewhat nondescript species, best diagnosed by the following set of characters considered together: Fused inferior appendages without an apicomesal process; elongate paramere appendages, somewhat widened preapically; and an upturned dorsal phallic spine with an acute apex, as viewed both laterally and dorsally. The lightly sclerotized ventral projection of the phallicata is also probably diagnostic, but may be more difficult to discern, depending on how the specimen has been cleared.

Adult. Length of forewing: male 2.5–2.9 mm, female 2.5–3.3 mm. Forewing with forks I, II, and III present, hind wing with fork II only. Spur formula 0:4:4. Overall color light brown. Legs yellowish, tibial spurs darker in color, contrasting with legs. Wing bar at anastamosis more or less distinctly marked with whitish setae, bar discontinuous.

Male genitalia. Ventral process of segment VI laterally compressed, ventrally projecting, subtriangular, wide basally, acute apically. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin weakly, 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 relatively shallow, U-shaped mesal excision and projecting lateral lobes; lateral lobes moderately elongate, apices acute to subacute as viewed both dorsally and laterally. Inferior appendages without ventromesal projection; laterally, on each side, with setose, dorsally-directed, non-tapering lobes, rounded apically. Mesal pockets of fused inferior appendages with apical processes short, dorsally curved. Paramere appendages elongate, narrow, slightly widened in apical 1/3rd, apices acute. Dorsal phallic spine, as viewed laterally, more or less uniform in width, upturned in apical 1/2, apex narrowed and acute in both lateral and dorsal views. Phallicata with sclerotized dorsal process subtending dorsal phallic spine, and, sclerotized, laterally directed dorsolateral processes; ventrally with short, lightly sclerotized mesal projection. Endophallic membrane apparently simple in structure, with sclerotized ventromesal spine; ventral spine moderately elongate, stout, curved, apex acute; phallotremal spines absent.

Holotype male: BRAZIL: Minas Gerais: Rio Paraúna, 3 km S Santana do Riacho , 19°10'59"S, 043°43'29"W, 650 m, 16.ii.1998, Holzenthal & Paprocki ( UMSP000031878 ) (pinned) ( MZUSP).

Paratypes: BRAZIL: Minas Gerais: same locality as holotype, 11.xi.2001, Holzenthal, Amarante, Blahnik , & Paprocki — 5 males, 21 females (alcohol) ( UMSP, NMNH) .

Etymology. This species is named M. parauna , used as a noun in apposition, for Rio Parauna, near which the type specimen for the species was collected.

Figures

FIGURE 13. Mortoniella parauna, new species, male genitalia: A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral; D— dorsal phallic spine, paramere appendages, and dorsolateral processes of phallicata, dorsal.