Mortoniella (Mortoniella) grandiloba, 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 : 55-56

Mortoniella (Mortoniella) grandiloba , new species

Fig. 36

Mortoniella grandiloba very closely resembles M. florica (Flint) and M. propinqua Blahnik and Holzenthal in having upright dorsal projections on the phallicata and short inferior appendages, without elongate mesal or apicolateral projections. It can be distinguished from either of those species in that the dorsal projections of the phallicata are very prominent and enlarged, and also in the distinctive shape of the dorsal phallic spine, which is relatively thick through the middle, as viewed laterally, and has the apex narrowed and slightly ventrally recurved.

Adult —Length of forewing: male 3.8 mm. Forewing with forks I, II, and III present, hind wing with forks II and III. Spur formula 0:4:4. Overall color dark brown, apices of tarsal segments and basal segments of antennae whitish. Tibial spurs slightly darker than legs, not distinctly contrasting in color. Wing bar at anastamosis relatively indistinct, marked with light brown setae.

Male genitalia —Ventral process of segment VI laterally compressed, short, ventrally projecting, truncately rounded apically, length slightly greater than width at base, process slightly retracted anterobasally. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin weakly rounded dorsally, narrowing ventrally; segment deeply mesally excised dorsally and ventrally, forming lateral lobes, separated dorsomesally by much less than ½ width of segment. Tergum X moderately elongate, lateral margins subparallel, apically with subacute, trianguloid apicomesal projection, apicolateral lobes bluntly rounded, slightly mesally curved; ventrolateral lobe nearly obsolete; ventromesal lobes with few short setae, extending from ventral margin of apicolateral lobes. Inferior appendages setose, with short rounded dorsolateral projections, and very short acute mesal projection. Mesal pockets of inferior appendage with apical processes short, posteroventrally curved. Paramere appendages elongate, narrow, extending beyond dorsal phallic spine, slightly widened preapically, apex acute; base of appendage emerging from projecting membranous lobe. Dorsal phallic spine, as viewed laterally, with dorsal margin broadly curved, ventral margin slightly undulate in contour, spine distinctly widened in middle, apex narrow, acute, slightly ventrally recurved; spine in dorsal view, widened through middle, gradually narrowed to acute apex. Phallicata relatively elongate, with very prominent, upright, sclerotized, rounded and inflated projections on dorsal margin; laterally with slightly produced, crease-like projection. Endophallic membrane simple, with single prominent curved, asymmetrically positioned, ventral spine; phallotremal spines absent.

Holotype male (pinned)— VENEZUELA: Barinas: 22 km NW Barinitas, 19.ii.1976, CM and OS Flint, Jr , ( UMSP000157413 ) ( NMNH).

Etymology —This species is named M. grandiloba for the enlarged, upright basodorsal lobes of the phallicata.

Figures

Figure 36. Mortoniella (Mortoniella) grandiloba, new species, male genitalia. A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral; D—dorsal phallic spine and dorsolateral projections of phallicata, dorsal; E—ventral process of segment VI, lateral.