Mortoniella (Mortoniella) dinotes, 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 : 48-49

Mortoniella (Mortoniella) dinotes , new species

Fig. 30

Mortoniella dinotes n. sp. is most similar to M. atenuata Flint in having inferior appendages with elongate ventral projections and noticeably forked paramere appendages. However, the ventral projections of the inferior appendages are more distinctly curved and rounded basally in M. dinotes and have a less prominent, upright, dorsal processes. Additionally, the paramere appendages in M. dinotes are more narrowly forked and the dorsal branch is very short.

Adult —Length of forewing: male 3.2-3.4 mm. Forewing with forks I, II, and III present, hind wing with fork II only. Spur formula 0:4:4. Overall color medium brown. Tibial spurs somewhat darker than legs, not strongly contrasting in color. Wing bar absent in male. Male with both surfaces of fore- and hind wings densely covered with short prostrate scale-like 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. Tergum VIII relatively wide (nearly as wide as previous segment), subtending ventral margin of segment IX, anterior margin of tergum with evident apodeme, posterior margin densely setose; membranous connection to tergum IX elongate, ballooned when expanded, sur-face noticeably textured. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin very slightly projecting, narrowing ventrally; segment deeply mesally excised dorsally and ventrally, forming lateral lobes, separated dorsomesally by much less than ½ width of segment. Tergum X short and strongly sclerotized, with deep U-shaped mesal excision, extending more than ½ length of segment; mesally with short sclerotized, apically rounded, ventral projection, apparently articulating with dorsal phallic spine. Inferior appendages with very short, nearly obsolete, dorsolateral lobes and very strongly curved, elongate, tapering, ventral lobes. Mesal pockets of inferior appendage with apical processes short, dorsally curved. Paramere appendages moderately elongate, narrowly forked near base, forming 2 narrow, apically acute projections, dorsal projection very short, ventral projection elongate; fused basal segments of paramere articulating with dorsal phallic spine before sinuous middle flexure. Phallobase with rounded, laterally compressed, dorsomesal apodeme. Dorsal phallic spine, as viewed laterally, more or less uniform in width, broadly S-shaped over its length, apex acutely narrowed and upturned; in dorsal view, nearly uniform in width throughout length. Phallicata very short, with short sclerotized dorsal projection and short rounded ventral lobe. Endophallic membrane short, with prominent pair of strongly sclerotized, spine-like, sclerites on basodorsal margin (possibly phallotremal sclerites), and very small mesal spine distal to basal sclerites; ventrally with short curved, lightly sclerotized, ventromesal spine.

Holotype male (pinned)— PERU: Huanuco: Tingo Maria , premontane rain forest, 672 m, 1- 6.ii.1980, JB Heppner ( UMSP000118533 ) ( MJP).

Paratypes — PERU: Huanuco: same data as Holotype – 2 males (alcohol) ( NMNH).

Etymology —This species is named M. dinotes , from the Greek word dinotos, meaning turned or rounded, and referring to the strongly rounded ventral projections of the inferior appendages in this species.

Figures

Figure 30. Mortoniella (Mortoniella) dinotes, new species, male genitalia. A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral; D—ventral process of segment VI, lateral.