Oxyethira (Trichoglene) abbreviata, 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 : 42-43

Taxon classification Animalia Trichoptera Hydroptilidae

Oxyethira (Trichoglene) abbreviata sp. n. Figs 10-12, 77, 89

Diagnosis.

Most closely similar to Oxyethira perignonica and Oxyethira tiwaka , all 3 having males with abdominal segment IX quadrate in ventral view. But Oxyethira abbreviata sp. n. is distinguished by having the ventral processes distally rounded and with a short sharp spine angled proximally compared with elongate convergent spines of Oxyethira perignonica , and elongate parallel spines of Oxyethira tiwaka .

Description.

Male antennae with 18-19 flagellomeres, flagellomeres rectangular in profile, sensilla placodea absent; anterior wing length 1.4-1.7 mm (n=4); tibial spurs 0,3,4; abdominal sternite VII with small sharp medial spine on distal margin.

Male, genitalia (Figs 10-12). Abdominal segment IX tubular, subquadrate in ventral view, distal margin truncate. Gonopods short, conical, widely separated, ventral processes also very short, rounded distally, in ventral view sharply pointed proximally, no setose lobes apparent. Phallic apparatus elongate, exceeding 3 abdominal segments in length, narrow; slender titillator present and subapically a tightly curved spine.

Material examined.

Holotype. Male (on slide), New Caledonia, Province Sud, Monts des Koghis, ca 800 m S Koghi Restaurant, 22.18447°S, 166.50315°E, 400 m, 11-26.xi.2003, Malaise trap, loc. 23, leg. K.A. Johanson (MNHP).

Paratypes. 2 males, Province Nord, Mt Aoupinié, 354 m, stream, loc. 17, light trap, 24.xi.2001, leg. K.A. Johanson, T. Pape & B. Viklund (NHRS); 1 male, Prov ince Sud, Col d’Amieu, 323 m, small stony river, loc. 24, 21°34.844'S, 165°49.677'E, Malaise trap, 30. xi– 5.xii.2001, leg. K.A. Johanson, T. Pape & B. Viklund (NHRS); 1 male, Province Sud, Mt Dzumac, source stream of Ouinne River, at crosspoint to mountain track, 22°02.218'S, 166°28.566'E, 797 m, 18.xi.2003, light trap, loc#032, leg. K.A. Johanson (NHRS); 1 male, Province Sud, Platou de Dogny, source of Dogny River, about 900 m SE summit of Platou de Dogny, 21.61917°S, 165.88072°E, 919 m, 25. xi– 16.xii.2003, Malaise trap, loc#046, leg. K.A. Johanson (NHRS).

Etymology.

abbreviata, named for the very abbreviated male genital structures.

Remarks.

This species was collected from several quite central sites (Fig. 89) from small rocky streams. A photograph of the type locality with the trap is rendered in Fig. 77.