Triplectides koghiensis, 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 : 12-13

Triplectides koghiensis , new species

Figs 41–48 , 94 .

Diagnosis. This species is distinct from many other Triplectides species on the basis of the spur formula 2:2:2. It is distinguished from the remaining New Caledonian species, except sasali , in the genitalia by the narrow tergum X in dorsal and ventral views. It is distinguished from sasali by the shorter apicodorsal lobe of the inferior appendages in relation to the harpagones.

Male: Body colour light to medium brown (in alcohol). Tibial spur formula 2:2:2. Claws on all legs unmodified. Forewing ( Figs 41, 43 ) length 7.5–9.0 mm (N=20); colour medium brown (in alcohol), with dark area around junction of R and Sc, light area a present round base of S4 and crossvein m-cu; forks 1, 2 and 5 present; fork 1 stalk about half as long as fork length; branching of m with stalk shorter than 1/3 fork length; Dc broadly triangular, less than half Tc length; distance between crossvein s and S4 shorter than length of S4, S4 meeting M at a distance shorter than length of S4, apically of crossvein m-cu. Hind wing ( Fig. 42 ) forks 2, 3 and 5 present; S4 arising at mid-length of Dc. Nygma present in all wings in fork 2.

Genitalia ( Figs 44–48 ): segment IX widest at mid-height, with ventral 1/3 slightly bent anterad; sternite IX with wide posterad projection centrally ( Fig. 46 ). Superior appendages ( Figs 44, 45 ) broad, about half as long as tergum X; apically rounded in dorsal view. Tergum X narrow, with prominent, bipartite, dorsobasal projection; in dorsal and ventral views ( Figs 45, 46 ) narrowing apically; laterally folding around phallus; apex with small, central notch; apical margin bearing minute apicodorsal setae. Inferior appendages ( Figs 44, 46 ) slender; apicodorsal lobes in length slightly exceeding harpagones; basoventral processes lanceolate in lateral view, directed posterolaterad, exceeding mesal lobes, not reaching base of harpagones; mesal lobes bearing no or single pair of setae, apically slightly concave (rugose), mesal part folded dorsally, lateral corners produced into rounded lobes, deeply separated from major branch. Phallus ( Figs 47, 48 ) gently curving along its length; in ventral view parallel-sided along its length; apex v-shaped with lateral flanges.

Distribution. This species has been found only in the Koghi Mountains north of Noumea ( Fig. 94 ).

Etymology. Name derived from type locality, Monts des Koghis.

Holotype male: New Caledonia: Province Sud: Monts des Koghis, ca 1.0 km from road RT1 between Noumea and Dumbéa, water reservoir, 22º10.919’S, 166º29.182’E, 91 m, 10.xi.2003, light trap, loc#020 [KA Johanson].

Paratypes: Province Sud: Monts des Koghis, ca 300 m S Koghi Restaurant, 22º18.288’S, 166º50.393’E, 447 m, 16–26.xi.2003, Malaise trap, loc#002 [KA Johanson] – 19 males.

Figures

FIGURES 41 – 48. Triplectides koghiensis, new species, male holotype. 41, forewing; 42, hind wing; 43, forewing anastomosis detail; 44, genitalia, lateral; 45, genitalia, dorsal; 46, genitalia, ventral; 47, phallus, lateral; 48, phallus, ventral.

FIGURES 92 – 94. Maps of Grande Terre, New Caledonia, with male Triplectides specimen records plotted. 92, Triplectides noumeiensis, new species; 93, Triplectides tigrinus, new species; 94, Triplectides koghiensis, new species.