Mortoniella (Mortoniella) barinasi, 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 : 79

Mortoniella (Mortoniella) barinasi , new species

Fig. 64

Mortoniella barinasi is most readily diagnosed by the elongate, curved ventral projections of the inferior appendages and by the shape and enlarged apex of the dorsal phallic spine. In both of these characters it has a similarity to M. pocita , which differs in having elongate projections from the dorsal margin of the phallicata and in lacking a ventromesal endophallic spine. The similarity of the two species may be only superficial.

Adult —Length of forewing: male 2.3-2.8 mm; female 3.0- 3.5 mm. Forewing with forks I, II, and III present, hind wing with fork II only. Spur formula 0:3/4:4. Overall color light brown (in alcohol, specimens faded). Wing bar not evident.

Male genitalia —Ventral process of segment VI laterally compressed, subtriangular, posteroventrally directed, length about 2 times width at base, apex acute, process not retracted anterobasally. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin broadly rounded, narrowing ventrally; segment deeply mesally excised dorsally and ventrally, forming lateral lobes, separated dorsomesally by much less than ½ width of segment. Tergum X relatively short, lateral margins subparallel, apicomesal margin nearly straight, apicolateral lobes relatively broad and short, subtruncate, apicolateral margin of each lobe with small, acute point; ventrolateral lobes short, rounded. Inferior appendages with short dorsolateral projections, apicoventral projections elongate, sinuous, apices acute and curved mesally. Mesal pockets of inferior appendage with spine-like apical processes narrow, moderate in length, posteriorly projecting. Paramere appendage elongate (extending about as far as dorsal phallic spine), somewhat irregular in contour, apex very narrow, acute, with sinuous dorsal inflection. Dorsal phallic spine stout, with ventral margin very sinuously indentate to accommodate rounded projection on endophallic membrane, apex enlarged and inflated, ventral margin of apex rounded, dorsal margin somewhat hood-like. Phallicata very short, with basodorsal projection, articulating with dorsal phallic spine, laterally with prominent sclerotized, posteriorly projecting, apically rounded, lobe. Endophallic membrane with narrow, curved ventromesal spine; phallotremal spines relatively elongate, narrow, narrowly divided, emerging from rounded basal projection that articulates with sinuous ventral indentation of dorsal phallic spine.

Holotype male (alcohol)— VENEZUELA: Barinas: Río Santo Domingo, 17.ii.1976, CM and OS Flint, Jr ( UMSP000097090 ) ( NMNH).

Paratypes — VENEZUELA: Barinas: same data as holotype – 6 males, 71 females (alcohol) ( NMNH), 2 males, 6 females (alcohol) ( UMSP).

Etymology —This species is named M. barinasi for the state of Barinas in Venezuela, where the type specimens were collected.

Figures

Figure 64. Mortoniella (Mortoniella) barinasi, 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.