Mortoniella (Nanotrichia) usseglioi ( Rueda Martín and Gibon, 2008 ) 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 : 102-103

Mortoniella (Nanotrichia) usseglioi ( Rueda Martín and Gibon, 2008) , new combination

Fig. 88 , 104 , 117

Mexitrichia n. sp. 3: Flint 1996: 382.

Mexitrichia usseglioi Rueda Martín and Gibon 2008: 219 .

This tiny species is a close sister species to M. macarenica (Flint) , differing primarily in having the parameres each with 3 elongate appendages (2 in M. macarenica ). Two of these emerge from the basal structure of the appendage and the third and longest appendage appears to be a true paramere appendage. The latter are distinctive in subtending the phallic ensemble, where they cross over one another, and thus are easily observed, even in uncleared specimens.

Adult —Length of forewing: male 1.8-2.0 mm; female 1.8-2.2 mm. Forewing with forks I, II, and III present, fork II with very long stalk, hind wing with fork II only; both wings narrow, acute apically. Spur formula 0:2/3:4. Overall color medium brown, legs slightly paler. Tibial spurs short, slightly darker than legs, weakly contrasting in color. Forewing with interrupted white wing bar at anastomosis, apices of wings with indistinct white spots. Males with scale-like setae paralleling veins of both fore- and hind wings.

Male genitalia —Ventral process of segment VI posteriorly projecting, short, narrow basally, length about 2½ times width at base. Segment VIII relatively narrow. Segment IX with anterolateral margin rounded and distinctly produced in ventral ½, posterolateral margin nearly straight; segment deeply mesally excised dorsally and ventrally, forming lateral lobes, separated dorsomesally by slightly less than ½ width of segment. Tergum X elongate, lateral margins subparallel; apex of tergum with deep V-shaped mesal emargination, extending less than ½ length of tergum; apicolateral lobes simple, subtruncate apically, as viewed dorsally, formed by mesal invagination; tergum, in lateral view, with very shallow apicolateral incision, forming angularly projecting ventrolateral lobe. Inferior appendages scarcely evident, strongly fused to venter of phallic ensemble. Mesal pockets of inferior appendage small, with elongate, narrow, posteriorly-directed, spine-like, apicoventral projections. Paramere with 3 elongate, narrow, subequal appendages, 1 emerging from dorsal of margin of rounded basal segment, 1 evidently emerging mesal to basal segment (possibly from mesal surface), 1 (probably true paramere appendage) emerging lateral to basal segment and crossing over corresponding appendage from opposite side, ventral to phallic ensemble. Phallobase with short rounded, lightly sclerotized, dorsomesal apodeme; ventrally with short ventral rod-like projections, not flared apically. Dorsal phallic spine, as viewed laterally, nearly uniform in width, strongly upturned in about apical 1/3, slightly widened preapically, apex acute; as viewed dorsally, nearly uniform in width, apex weakly divided mesally, forming 2 acute apical projections. Phallicata distinctly tube-like, with pair of short spine-like basolateral projections, apicolateral margins flared. Endophallic membrane somewhat ballooned, with indistinct apical sclerite; phallotremal spines very small, but distinct.

Material examined — BOLIVIA: La Paz: ANMI Madidi, Chalalan Ecolodge, Río Tuichi and tributary at entrance to lodge, 14.41695° S, 67.90630° N, 300 m, 27.vii.2003, Robertson and Blahnik – 392 males, 972 females (alcohol) ( UMSP) ; PERU: Avispas , - x.1962, LE Peña G – 38 males, 15 females (alcohol) ( NMNH) ; Junin: Mission Cutivireni at Río Namiri , 6-25.iii.1985, HM Savage – 4 males, 1 female (alcohol) ( NMNH) ; Madre de Dios: Tambopata Wildlife Res. , 30 km SW Pto. Maldonado, 12.83333° S, 69.28333° W, 290 m, 1-14.i.1983, JJ Anderson – 1 male (pinned) ( NMNH) ; Manu, Erika (nr. Salvacion ), 550 m, 4-6.ix.1988, O Flint and N Adams – 1 male, 2 females (pinned), 35 males, 136 females (alcohol) ( NMNH) ; Manu, Río Manu, Limonal (10 km N Boca Manu), 200 m, 7.ix.1988, O Flint and N Adams – 8 females (alcohol) ( NMNH) ; Manu, Pakitza , 12.11667° S, 70.96667° W, 250 m, 9.ix.1988, O Flint and N Adams – 1 male (alcohol) ( NMNH) ; Hostel Erica (nr. Salvacion ), 12°53’S, 71°14’W, 550 m, 3-5.ix.1989, RA Faitoute et al.– 2 males, 5 females (alcohol) ( NMNH) ; same location and date, N Adams et al.– 1 male (alcohol) ( NMNH) ; between Boca Manu and Romera, along Manu River , 250 m, 16.ix.1989, RA Faitoute – 1 female (alcohol) ( NMNH) .

Distribution — Bolivia, Peru.

Figures

Figure 88. Mortoniella (Nanotrichia) usseglioi (Rueda Martín and Gibon), 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.

Figures 102-104. Mortoniella (Nanotrichia) species, wings. 102—Mortoniella eduardoi (Rueda Martín and Gibon) [velasquezi group]. A—forewing; B—hind wing. 103—Mortoniella collegarum (Rueda Martín and Gibon) [ormina group]. A—forewing; B—hind wing. 104—Mortoniella usseglioi (Rueda Martín and Gibon) [ormina group]. A—forewing; B—hind wing.