Mortoniella longispina, Blahnik & Holzenthal, 2011

Blahnik, Roger J. & Holzenthal, Ralph W., 2011, Revision of the austral South American species of Mortoniella (Trichoptera: Glossosomatidae: Protoptilinae) 2851, Zootaxa 2851 (1), pp. 1-75 : 24-26

Mortoniella longispina , new species

Fig. 11

This member the M. albolineata subgroup of species is distinguished by the following diagnostic character set: Fused inferior appendages without distinct ventromesal process; endophallic spine very large, prominent, and strongly curved; paramere appendages short, uniform in width; and dorsal phallic spine angularly upturned apically. It is perhaps most similar overall to Mortoniella guahybae , n. sp., but differs particularly in its much more prominent endophallic spine and in that the apicolateral processes of tergum X are less narrowed and the mesal incision of that structure is wider and V-shaped.

Adult. Length of forewing: male 3.6 mm, female 3.6–4.0 mm. Forewing with forks I, II, and III present, hind wing with fork II only. Spur formula 0:4:4. Overall color medium brown. Legs brown, apices of tarsi whitish, tibial spurs somewhat darker than legs, but not strongly contrasting in color. Antennae with apical part of basal segments whitish. Wing bar at anastamosis more or less distinctly marked with whitish setae, bar narrow, discontinuous.

Male genitalia. Ventral process of segment VI laterally compressed, ventrally projecting, subtriangular, wide basally, rounded to subacute apically. Segment IX nearly evenly rounded anterolaterally, length greatest midlaterally, posterolateral margin convexly rounded, narrowing ventrally; segment deeply excised dorsomesally and ventromesally, forming lateral lobes, lobes separated dorsomesally by much less than 1/2 width of segment. Tergum X with broad V-shaped mesal excision and weakly projecting lateral lobes; lateral lobes acute apically, as viewed dorsally, short and rounded as viewed laterally. Inferior appendages without ventromesal projection; laterally, on each side, with setose, tapering, dorsally-directed lobes. Mesal pockets of fused inferior appendages with apical processes moderately elongate, curved, distinctly thickened through most of length. Paramere appendages short, narrow, uniform in width, apices acute, appendages somewhat downcurved. Dorsal phallic spine, as viewed laterally, more or less uniform in width, strongly upturned in apical 1/3rd, apex cute. Phallicata with weakly projecting, broadly rounded, sclerotized dorsolateral processes; ventral margin moderately projecting, lightly sclerotized, with rounded apical projection. Endophallic membrane with very elongate, sclerotized spine; spine curved at base, straight apically, apex acute; phallotremal spines absent.

Holotype male: BRAZIL: Santa Catarina: Urubici, Rio Canoas , road to Campo dos Padres, 28°00'15"S, 049°22'24"W, 1100 m, 7.iii.1998, Holzenthal, Froehlich & Paprocki ( UMSP000029822 ) (pinned) ( MZUSP).

Paratypes: BRAZIL: Santa Catarina: same data as holotype — 25 females (pinned) ( MZUSP, UMSP) .

Etymology. This species is named M. longispina, Latin for long spine, in reference to the very long spine of the endophallic membrane of the male.

Figures

FIGURE 11. Mortoniella longispina, new species, male genitalia: A—lateral; B—segment IX and tergum X, dorsal; C—phallic ensemble, ventral.