Mortoniella (Nanotrichia) coheni, 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 : 106-107

Mortoniella (Nanotrichia) coheni , new species

Fig. 91 , 125

Mexitrichia n. sp. 5: Flint 1996: 382.

This is a fairly distinctive species and can be distinguished from others in the velasquezi group by having the reflexed apex of the dorsal phallic spine distinctly inflated, with the posterior margin rounded, rather than angular. The dorsal projection on the endophallic membrane is very strongly sclerotized and spine-like, as are the apicoventral sclerites. An additional identifying feature is that scale-like setae are absent on both fore- and hind wings of males.

Adult —Length of forewing: male 2.3-2.6 mm; female 2.6-2.9 mm. Forewing with forks I, II, and III present, hind wing with fork II only. Spur formula 0:3:4. Overall color (in alcohol) medium brown, legs slightly paler. Tibial spurs darker than legs, contrasting in color. Forewing with distinct white wing bar at anastomosis, Males without scale-like setae on wings.

Male genitalia —Ventral process of segment VI posteriorly projecting, narrow basally, length about 3 times width at base. 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 about ½ width of segment. Tergum X, as viewed laterally, relatively short and narrow, rod-like, apex rounded; as viewed dorsally, short and wide, apicomesally with deep emargination, extending about ½ length of tergum; ventrolateral lobes obsolete. Inferior appendage with prominent digitate, setose dorsolateral projections, fused apicoventrally to spine-like projections of the mesal pockets. Mesal pockets of inferior appendage very large, with elongate thick, spine-like, apicoventral projections. Paramere appendage elongate, narrow, extending nearly straight, nearly uniform in width, apex acute. Phallobase very short, with elongate ventral rodlike projections, each strongly flared apically. Dorsal phallic spine, as viewed laterally, short and wide, strongly reflexed in about apical 2/5; ventral margin with dimple-like indentation at point of inflection; reflexed apex strongly inflated, rounded on posterior margin, subacute apically; as viewed dorsally, with distinct rounded dorsolateral projections in basal ½, gradually narrowing apically, reflexed apex rounded. Phallicata short, continuous with endophallic membrane apically, laterally with broadly rounded sclerotized projections, surrounding mesal pockets of inferior appendage, Endophallic membrane short and wide, continuous with phallicata, dorsomesally with strongly sclerotized, short, preapical, spine-like projection, articulating with dimple-like indentation in dorsal phallic spine; ventrally with pair of strongly sclerotized, curved, spine-like projections (modified phallotremal spines?).

Holotype male (alcohol)— ECUADOR: Pastaza: Puyo (3 km W), 15.vii.1976, J Cohen ( UMSP000097141 ) ( NMNH).

Paratypes — ECUADOR: Napo: Puyo , 6.v.1977, PJ Spangler and DR Givens – 1 male (alcohol) ( NMNH) ; Archidona, Río Misahuallí , 650 m, 11.ix.1990, PJ Spangler – 1 male, 2 females (alcohol) ( NMNH) ; Pastaza: Puyo , riverside, 29.v.1975, Cohen and Langley – 4 males (alcohol) ( NMNH) ; Puyo , 5.v.1977, PJ Spangler and DR Givens – 10 males 14 females (alcohol) ( NMNH) ; same locality and collectors, 6.v.1977 – 3 males, 6 females (alcohol) ( NMNH) ; same locality and collectors, 7.v.1977 – 3 males, 4 females (alcohol) ( NMNH) ; same locality and collectors, 8.v.1977 – 2 males, 5 females (alcohol) ( NMNH) ; same locality and collectors, 10.v.1977 – 4 male, 1 female (alcohol) ( NMNH) ; same locality and collectors, 11.v.1977 – 1 male (alcohol) ( NMNH) ; same locality and collectors, 13.v.1977 – 10 males, 15 females (alcohol) ( NMNH) ; same locality and collectors, 14.v.1977 – 14 males, 31 females (alcohol) ( NMNH) ; same locality and collectors, 21.v.1977 – 4 males (alcohol) ( NMNH) ; Puyo , 30.i.1976, Spangler, et al.– 170 males, 185 females (alcohol) ( NMNH) ; same locality and collectors, 1.ii.1976 – 1 male, 1 female (alcohol) ( NMNH) ; same locality and collectors, 8-11.ii.1976 – 1 male, 3 females (alcohol) ( NMNH) ; Puyo (1.5 km S), 14.v.1977, PJ Spangler and DR Givens – 14 males, 31 females (alcohol) ( NMNH) ; same data as Holotype– 51 males, 52 females (alcohol) ( NMNH) 5 males, 5 females (alcohol) ( UMSP) ; PERU: Monson Valley, Tingo Maria , 18.1 x.1954, EI Schlinger and ES Ross – 1 male (alcohol) ( CAS) ; Cuzco: Pilcopata , premontane moist forest, 600 m, 11-14.xii.1979, JB Heppner – 1 male (alcohol) ( NMNH) ; Madre de Dios: Manu, Erika (near Salvación ), 550 m, 4-6.ix.1988, O Flint and N Adams – 2 males, 1 female (alcohol) ( NMNH) ; Manu, Erika Hostel (near Salvación ), 12.0500° S, 71.2333 ° W, 550 m, 3-5.ix.1989, N Adams et al.– 1 male, 1 female (alcohol) ( NMNH) ; same locality and date, RA Faitoute et al.– 2 males (alcohol) ( NMNH) .

Etymology —This species is named M. coheni for Jeffrey Cohen, in recognition of the contribution he made in furthering the knowledge of the aquatic insects of Ecuador through his Peace Corps collecting efforts.

Figures

Figure 91. Mortoniella (Nanotrichia) coheni, 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.

Figures 121-125. Mortoniella (Nanotrichia), velasquezi group species, female genitalia.121—Mortoniella eduardoi (Rueda Martín and Gibon): A—lateral; B—dorsal. 122—Mortoniella licina, n. sp., dorsal. 123—Mortoniella venezuelensis, n. sp., dorsal. 124—Mortoniella spangleri, n. sp. A—lateral; B—dorsal. 125—Mortoniella coheni, n. sp., dorsal.