Mortoniella (Mortoniella) hamata, Blahnik & Holzenthal, 2017

Blahnik, Roger J. & Holzenthal, Ralph W., 2017, Revision of the northern South American species of Mortoniella Ulmer 1906 (Trichoptera: Glossosomatidae: Protoptilinae) *, Insecta Mundi 2017 (602), pp. 1-251 : 19-20

Mortoniella (Mortoniella) hamata , new species

Fig. 6

Mortoniella bilineata Ulmer : Blahnik and Holzenthal 2011: 62 [ Fig. 33 A-D, female genitalia (name misapplied)].

This species is most similar to M. roldani Flint. Both species have narrow, paired, ventromesal processes on the inferior appendages and elongate ventral sclerites on the phallicata. Mortoniella bilineata Ulmer and M. paralineata Sykora also have elongate ventral sclerites on the phallicata, but both of these species have a single ventromesal process on the inferior appendages. As compared to M. roldani , the paired mesal processes of the inferior appendages in M. hamata are more curved, in lateral view, and hooked or barbed apically. The ventral sclerites of the phallicata, as viewed ventrally, have their apicolateral margins distinctly convexly rounded in M. roldani ( Fig. 9C ), whereas they are nearly straight or slightly concave in M. hamata ( Fig. 6C ); the converse is true of the apicomesal margins of the same structures, which are nearly straight in M. roldani and weakly convex in M. hamata .

Adult —Length of forewing: male 4.2-4.6 mm; female 5.2-5.4 mm. Forewing with forks I, II, and III present, hind wing with forks II, III, and V. Spur formula 0:4:4. Overall color medium brown or goldenbrown. Legs same color as wings, tibial spurs only slightly darker, somewhat contrasting with legs. Forewing with 2 distinct white wing bars, 1 at anastomosis and 1 on proximal part of wing, approximately midway between base and anastomosis; apex of wing with fringe of whitish setae.

Male genitalia —Ventral process of segment VI prominent, posteriorly projecting, narrow basally, length about 3 times width at base. Tergum VIII relatively narrow, subtending ventral margin of segment IX, membranous connection to tergum IX elongate. Segment IX with anterolateral margin rounded and produced in ventral half, posterolateral margin with distinctly angular projection in dorsal half; segment deeply mesally excised dorsally and ventrally, forming lateral lobes, separated dorsomesally by more than ½ width of segment. Tergum X elongate, lateral margins subparallel, laterally with acute, finger-like, lateral lobes, each with prominent apical seta; apex of tergum distinctly sclerotized, subtruncate, with ventrolateral margins incurved and converging mesally to form linear “seam,” apicodorsally with lightly sclerotized connection near apex (mesal notch nearly absent); tergum ventromesally with paired, rounded, lightly sclerotized, ventromesal lobes in basal half, each with short setae. Inferior appendages with subtriangular lateral lobes and short narrow, paired, ventromesal lobes, each forked near apex. Mesal pockets of inferior appendage with moderately elongate, posteriorlydirected, sinuous, spine-like, apicoventral projections. Paramere appendage elongate, narrow, nearly uniform in width, apex acute, extending about same length as dorsal phallic spine; basal segment of appendage articulating near base of dorsal phallic spine. Phallobase with evident rounded, laterally compressed, dorsomesal apodeme. Dorsal phallic spine, as viewed laterally, with dorsal margin strongly curved and arched from base, sinuously and nearly rectilinearly upturned in apical 1/5, apex of spine rounded; base of spine narrow, curved and stalk-like, moderately widened on ventral margin at about basal 1/3, forming angular ventral projection, narrowing apically from projection; spine, as viewed dorsally, nearly uniformly narrow in width throughout length. Phallicata with sclerotized basodorsal projection, articulating with angular ventral projection of dorsal phallic spine, basodorsal projection with lateral margins forming short rounded lobes; phallicata ventrally with elongate, narrow, projecting, sclerotized lobes, extending about same length as paramere appendages; apices of lobes, as viewed ventrally, nearly straight on lateral margins and forming rounded lobes on mesal margins. Endophallic membrane simple in structure, with only weakly developed membranous lateral lobes; dorsal margin with weakly sclerotized area, apparently to accommodate flexed part of dorsal phallic spine; phallotremal spines absent.

Holotype male (pinned) — COLOMBIA: Cauca: Municipio de Inzá, Quebrada San Andrés, ca. 500 m W Restaurante “La Portada”, San Andrés de Pisimbalá, 2.58222° N, 76.04333° W, 1750 m, 21.xii.1997, F Muñoz-Q et al. ( UMSP000209440 ) ( UMSP).

Paratypes — COLOMBIA: Cauca: same data as holotype– 2 males, 2 females (pinned) ( UMSP), 1 male ( NMNH) ; Municipio de Inzá , Quebrada San Andrés, 1km S del centro de San Andrés de Pisimbalá, 2.57667° N, 76.03639° W, 1730 m, 20.xii.1997, F Muñoz-Q et al.– 1 female (pinned) ( UMSP) .

Etymology —This species is named M. hamata from the Latin work hamus, a hook or barb or angle, and referring to the pair of hooked mesal processes on the inferior appendages.

Figures

Figure 6. Mortoniella (Mortoniella) hamata, new species, male genitalia. A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral; D—dorsal phallic spine, dorsal; E—ventral process of segment VI, lateral.

Figure 9. Mortoniella (Mortoniella) roldani Flint, male genitalia. A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral; D—ventral process of segment VI, lateral.

Figure 33. Mortoniella (Mortoniella) flexuosa, new species, male genitalia. A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral; D—dorsal phallic spine, dorsal; E—ventral process of segment VI, lateral.