Oxyethira (Trichoglene) amieu, 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 : 47

Taxon classification Animalia Trichoptera Hydroptilidae

Oxyethira (Trichoglene) amieu sp. n. Figs 23, 24, 93

Diagnosis.

Males are similar to Oxyethira arok and Oxyethira houailou sp. n. in the shape of abdominal segment IX, which in ventral view is strongly tapered and more or less triangular proximally, but both Oxyethira amieu sp. n. and Oxyethira houailou sp. n. also taper distally, while Oxyethira arok is more or less parallel-sided in distal half; in Oxyethira amieu sp. n. and Oxyethira arok gonopods are so reduced they cannot be identified clearly whereas in ventral view they are subquadrate in Oxyethira houailou sp. n.

Description.

Male antennae with 22 flagellomeres; flagellomeres rectangular in profile, without sensilla placodea; anterior wing length 1.4 mm (n=1); tibial spurs 0,3,4; abdominal sternite VII with a short slender apico-mesal spur.

Male, genitalia (Figs 23, 24). Abdominal segment IX in ventral view subtriangular in proximal half, with proximal margin broadly rounded, distally tapered to about half maximum width; in lateral view triangular; gonopods reduced completely, subgenital processes rod-like, tapered distally, setal lobes almost at right angles to length of body; phallic apparatus with slender titillator and narrow, elongate subapical spine.

Material examined.

Holotype. Male, New Caledonia, Chute, ~15 km N Col d’Amieu on La Foa–Canala Rd, xii.1998, A. Wells, (MNHP).

Etymology.

Named for the Col d’Amieu.

Remarks.

Known only from the type locality, a waterfall towards the top of the massif (Fig. 93).