Triplectides abnormalis, Malm, Tobias & Johanson, Kjell Arne, 2008

Malm, Tobias & Johanson, Kjell Arne, 2008, Description of eleven new Triplectides species (Trichoptera: Leptoceridae) from New Caledonia, Zootaxa 1816, pp. 1-34 : 5

Triplectides abnormalis , new species

Figs 9–16 , 90 .

Diagnosis. This species is separated from many other Triplectides species by the spur formula 2:2:2. It is easily distinguished from the remaining species by the absence of the hind wing discoidal cell, due to reduction of the basal parts of S1+2.

Male: Body colour light straw to golden brown (in alcohol). Tibial spur formula 2:2:2. Claws on all legs unmodified. Forewing ( Figs 9, 11 ) length 7.5–8.5 mm (N=8); colour light golden brown (in alcohol); diffuse, dark areas present proximal to fork 1, extending anteriorly to R and in fork 5; lighter area present around S4 and crossvein m-cu; forks 1, 2 and 5 present; fork 1 and branching of m with short stalks; Dc narrow, about half length of Tc; distance between crossvein s and S4 shorter than length of S4, S4 meeting M close to crossvein m-cu. Hind wing ( Fig. 10 ) forks 2, 3 and 5 present; S4 arising about its own length proximal to s; Dc absent due to reduction of basal parts of S1+2. Nygma present in all wings in fork 2.

Genitalia ( Figs 12–16 ): segment IX narrow, widest dorsally, in ventral view ( Fig. 14 ) with small central posterad extension. Superior appendages ( Figs 12, 13 ) about 2/3 as long as tergum X; dorsoventrally flattened; broad; in dorsal view ( Fig. 13 ) slightly club-shaped, apices rounded. Tergum X with small, bifid dorsobasal projection; in ventral view ( Fig. 14 ) widening, towards apical 3/4; apical lobes slightly rounded; apex with minute marginal setae; ventrally with lateral, setae-bearing, prominent carinae, readily seen in lateral view ( Fig. 12 ). Inferior appendages ( Figs 12, 14 ) slender; apicodorsal lobes slightly longer than robust harpagones; basoventral processes short, rounded, basally directed posterolaterad before curving posterad, not exceeding mesal lobes; mesal lobes wide, apically flat, with small, sharp laterad protrusion, shallowly separated from major branches. Phallus ( Figs 15, 16 ) bent posterad shortly after 1/3 its length; apex with 2 protruding, lateral flanges; weakly broadening distally in ventral view ( Fig. 16 ).

Distribution. This species seems restricted to the southern 1/3 of Grande Terre ( Fig. 90 ).

Etymology. From Latin, abnormalis – departing from rule, abnormal; named for the atypical absence of the hind wing discoidal cell.

Holotype male: New Caledonia: Province Sud: Parc Territorial de la Rivière Bleue, stream draining into north bank of Rivière Bleue, at Pont de la Source, 22º05.863’S, 166º38.516’E, 6–7.x.2006, light trap, loc #125 [KA Johanson & M Espeland].

Paratypes: Province Sud: same data as holotype – 1 male; Tamoa River, 700 m S road RT1 between Noumea and La Foa, 22º04.518’S, 166º16.592’E, 19.xi.2003, light trap, loc #033 [KA Johanson] – 1 male; Mt Dzumac, source stream of Ouinne river, downstream cross-point to track, 22º02.330’S, 166º28.605’E, 796 m, 3.xii.2003, light trap, loc #062 [KA Johanson] – 3 males; Dumbea river, Branche Sud, 22º08.344’S, 166º30.147’E, 42 m, 18.x.2006, light trap, loc #006 [KA Johanson & M Espeland] – 1 male; Parc territorial de la Rivière Bleue, small stream draining into north bank of Rivière Bleue, 22º05.246’S, 166º38.182’E, 6– 7.x.2006, light trap, loc #126 [KA Johanson & M Espeland] – 1 male.

Figures

FIGURES 9 – 16. Triplectides abnormalis, new species, male holotype. 9, forewing; 10, hind wing; 11, forewing anastomosis detail; 12, genitalia, lateral; 13, genitalia, dorsal; 14, genitalia, ventral; 15, phallus, lateral; 16, phallus, ventral.

FIGURES 89 – 91. Maps of Grande Terre, New Caledonia, with male Triplectides specimen records plotted. 89, Triplectides mouiensis, new species; 90, Triplectides abnormalis, new species; 91, Triplectides minutus, new species.