Oxyethira (Pacificotrichia) quadrata, 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 : 53-54

Taxon classification Animalia Trichoptera Hydroptilidae

Oxyethira (Pacificotrichia) quadrata sp. n. Figs 38, 98

Diagnosis.

This species is distinguished in the male from the similar species Oxyethira oropedion by the broadly truncate subgenital process rather than triangular to rounded, flanges on the phallic apparatus; and by the significantly longer antennae of 32 flagellomeres compared to 22-24 flagellomeres.

Description.

Male antennae with 32 flagellomeres, flagellomeres rectangular in profile, without sensilla placodea; anterior wing length 1.8 mm (n=1); tibial spurs 0,3,4; posterior spurs on hind leg longer than anterior spurs; abdominal sternite VII with sharp spur sub-apico-medially.

Male, genitalia (Fig. 38). Abdominal segment VIII rounded proximally, tapered slightly to distal margin, a pair of small setose lobes mesally at base of gonopods, gonopods in form of short discrete conical lobes, setose lobes of ventral processes short, subgenital process a subquadrate plate. Phallic apparatus distally with a lateral flange, but no free spine or 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).

Etymology.

The name quadrata is descriptive of the shape of the subgenital processes.

Remarks.

Only one specimen of this species was identified, from the far south of the island (Fig. 98). Were it not for the exceedingly long antennae, we would probably have referred it to Oxyethira oropedion , broadening the concept of Oxyethira oropedion . A photograph of the type locality with the trap is rendered in Fig. 79.