Oxyethira (Trichoglene) parinsularis, Wells, Alice & Johanson, Kjell Arne, 2015

Wells, Alice & Johanson, Kjell Arne, 2015, Review of New Caledonian species of Oxyethira Eaton, with description of 17 new species, and new records for Hydroptila Dalman and Hellyethira Neboiss (Trichoptera, Hydroptilidae), ZooKeys 530, pp. 37-90 : 49-50

Taxon classification Animalia Trichoptera Hydroptilidae

Oxyethira (Trichoglene) parinsularis sp. n. Figs 31-34, 79, 96

Diagnosis.

Males are distinguished from those of the closely similar Oxyethira insularis by the shape of gonopods which have longer, more elongate and slender divergent arms and very short, fused basal portion.

Description.

Male antennae with 18-19 flagellomeres, flagellomeres rectangular in profile, without sensilla placodea, with numerous sensilla auricillica; anterior wing length 1.5-1.8 mm (n=7); tibial spurs 0,3,4; abdominal sternite VII with median spine.

Male, genitalia (Figs 31-34). Abdominal segment IX rounded proximally, in ventral view apically almost truncate but shallowly excavated medially, in dorsal view deeply and roundly excavated, with a pair of short, curved sclerotised processes mesally, interpreted as homologues of ventral processes, with associated short setose lobes; gonopods forked, forming a pair of widely divergent slender, curved spines, basally fused in a narrow band; phallic apparatus with a strongly recurved narrow spine apically; titillator present.

Material examined.

Holotype. Male (on slide), New Caledonia, Province Sud, Mt Dzumac, source stream of Ouinne River, near crosspoint to mountain track, 22°02.073'S, 166°28.460'E, 810 m, 18. xi– 4.xii.2003, Malaise trap, loc#030, leg. K.A. Johanson, (MNHP).

Paratypes. 12 males (2 on slides), data as for holotype, (NHRS); 8 males, Province Sud, Mt Dzumac, source stream of Ouinne River, near crosspoint to mountain track, 22°02.439'S, 166°28.646'E, 805 m, 18. xi– 4.xii.2003, Malaise trap, loc#029, leg. K.A. Johanson (NHRS); 1 male, New Caledonia, Province Sud, Plateau de Dogny, source of Dogny River, about 1.4 km SE summit of Plateau, about 20 m upstream waterfall, 21.62054°S, 165.88503°E, 912 m, 25. xi– 16.xii.2003, Malaise trap, loc#049, leg. K.A. Johanson, leg. K.A. Johanson (NRMS); 1 male (on slide), Province Sud, W slope Mt Ningua, Kwé Néco, Stream, at Camp Jacob, 3.7 km WNW summit of Mt Ningua, on Boulouparis–Thio Road, about 50 m upstream road, 21°43.613'S, 166°06.567'E, 150 m, 29. xi– 12.xii.2003, Malaise trap, loc#054, leg. K.A. Johanson (ANIC).

Remarks.

The close similarity between this species and Oxyethira insularis is worrying, especially since both were taken at one site, yet the differences are clear and consistent. The species was taken only in the southern province (Fig. 96). A photograph of the type locality with the trap is rendered in Fig. 79.