Oxyethira (Trichoglene) perignonica, 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 : 41-42

Taxon classification Animalia Trichoptera Hydroptilidae

Oxyethira (Trichoglene) perignonica sp. n. Figs 7-9, 76, 88

Diagnosis.

Male is distinguished from Oxyethira incurvata sp. n. which also has the gonopods situated laterally and mesally directed although in Oxyethira perignonica they are more spur-like, and the rods of the ventral processes are sharply pointed and convergent.

Description.

Male antennae with 17-18 flagellomeres, flagellomeres without sensilla placodea, each flagellomere about 1.5 X longer than wide; anterior wing length 1.4-1.7 mm (n=2); tibial spurs 0,2,4; abdominal sternite VII without median spur.

Male, genitalia (Figs 7-9). Abdominal segment IX in ventral view subquadrate, distally truncate with a small tuft of short setae each side of midline. Gonopods in ventral view forming a short, stout, mesally directed spur at each apico-lateral angle; setose lobes and rods of subgenital processes widely separated at bases, rods obliquely arranged, apically convergent; in lateral view, rods sharply down-turned. Phallic apparatus elongate, almost length of segments VII–IX, with a fine titillator and, subapically, a slender spine which in some specimens lies parallel to the length of the phallic apparatus, in others is twisted about it orthogonally.

Material examined.

Holotype. Male (on slide), New Caledonia, Province Sud, stream draining to Marais de la Rivière Blanche, 5 km SW Pont Pérignon, 22°09.513'S, 166°39.942'E, 180 m, 6-16.xi.2003, Malaise trap, loc#011, leg. K.A. Johanson (MNHP).

Paratypes. 2 males (1 on slide), Province Sud, W part of Plaine des lacs, 150 m downstream bridge at La Capture, 22°15.967'S, 166°49.493'E, 261 m, 04-22.xi.2003, Malaise trap, loc#007, leg. K.A. Johanson (NHRS); 1 male, Province Sud, stream draining to Marais de la Rivière Blanche, 1.35 km S Pont Pérignon, 22°08.496'S, 166°42.152'E, 180 m, 6-16.xi.2003, Malaise trap, loc#009, leg. K.A. Johanson (NHRS); 2 males, Province Sud, stream draining to Marais de la Rivière Blanche, 2.25 km SW Pont Pérignon, 22.14158°S, 166.67993°E, 157 m, 6-16.xi.2003, Malaise trap, loc#010, leg. K.A. Johanson (NHRS); 2 males (one headless), same data as for holotype, (NHRS); 1 male (on slide), Province Sud, Monts Kwa Ne Mwa, on road between Noumea and Yaté, 1.5 km E Pic Mouirange, 22°12.545'S, 166°40.246'E, 143 m, 9.xi.2003, light trap, loc#018, leg. K.A. Johanson (NHRS).

Etymology.

Named for the bridge on the river near where the holotype was collected.

Remarks.

Taken only at several sites in the south of the island (Fig. 88), this species appears to have a highly localised distribution. A photograph of the type locality with the trap is rendered in Fig. 76.