Oxyethira (Trichoglene) incurvata, 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 : 43-44

Taxon classification Animalia Trichoptera Hydroptilidae

Oxyethira (Trichoglene) incurvata sp. n. Figs 13-15, 78, 90

Diagnosis.

Males resemble superficially those of Oxyethira perignonica both having mesally directed, laterally situated gonopods, but in ventral view these are more slender than those of Oxyethira perignonica and the rods of the subgenital processes are aligned in parallel with the distal margins of sternite IX in contrast to Oxyethira perignonica in which the they form sharp spines angled obliquely.

Description.

Male antennae with 20-25 flagellomeres, flagellomeres with few sensilla placodea, each rectangular in profile and 1.5 –2× longer than wide; anterior wing length 1.2-1.5 mm (n=8); tibial spurs 0,3,4; abdominal sternite VII without median spur.

Male, genitalia (Figs 13-15). Abdominal segments VIII and IX rounded proximally. Abdominal sternite IX truncate distally, small areas of short setae apically each side of midline. Gonopods forming two strongly in-curved sclerotised processes at apico-lateral angles, setose lobes and sclerotised rods of subgenital processes widely separated, rods tapered to narrowly rounded apices. Phallic apparatus elongate, a slender sinuous spine subapically.

Material examined.

Holotype. Male, New Caledonia, Province Nord, Mt Panié, 20.57306°S, 164.77139°E, 902 m, 9.xii.2003, Malaise trap, loc#075, leg. K.A. Johanson (MNHP).

Paratypes. 4 males (2 on slides), Province Sud., Rivière Bleue, 282 m, stony river, loc 4, 22°05.705'S, 166°38.225'E, Malaise trap, 13-16.xi.2001, leg. K.A. Johanson, T. Pape & B. Viklund (NHRS); 5 males, 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); 5 males, Province Sud, side stream to Rivière Blanche, 10.75 km SW Pont Pérignon, 22°10.073'S, 166°39.903'E, 180 m, 6-16.xi.2003, Malaise trap, loc#012, leg. K.A. Johanson (NHRS); 1 male, 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 (NHRS); 3 males (1 on slide), Province Sud, Mt Dzumac, source stream of Ouinne River, downstream crosspoint to mountain track, 22°01.997'S, 166°28.486'E, 795 m, over about 30 m waterfall, 18. xi– 4.xii.2003, Malaise trap, loc#031, leg. K.A. Johanson (NHRS); 1 male, 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).

Etymology.

The name incurvata is descriptive of the orientation of the gonopods.

Remarks.

From the collecting records the distribution of this species appears to be highly disjunct (Fig. 90), with records from the northern and southern extremes of the island. A photograph of the type locality with the trap is rendered in Fig. 78.