Caledonotrichia bifida, Wells, Alice, Johanson, Kjell Arne & Mary-Sasal, Nathalie, 2013

Wells, Alice, Johanson, Kjell Arne & Mary-Sasal, Nathalie, 2013, The New Caledonian genus Caledonotrichia Sykora (Trichoptera, Insecta) reviewed, with descriptions of 6 new species, ZooKeys 287, pp. 59-89 : 70-71

Caledonotrichia bifida sp. n. Figs 14, 1627-2944

Diagnosis.

Males very closely resembling Caledonotrichia illiesi and Caledonotrichia minuta sp. n., with which they share the features of wings without scales and both lobes of gonopods rounded. Like Caledonotrichia minuta , they differ from Caledonotrichia illiesi by their smaller size and far less robust appearance, and shorter antennae; they are distinguished from Caledonotrichia minuta by having the ventral lobes of gonopods about half as long as dorsal lobes, dorsal lobes less broadly rounded, and sclerotised rods of subgenital process bifid apically, but not dilated as in Caledonotrichia minor .

Description, male.

Head. Rounded in dorsal view, as in Caledonotrichia capensis sp. n. (Fig. 1). Antennae (Fig. 16) with 22-23 flagellomeres; most flagellomeres elongate-cylindrical with ends angled obliquely, not more than 2.5 × width. Maxillary palps (Fig. 14) with basal segment short and rounded, segments 2, 3 and 5 cylindrical, segments 3 and 5 length about 3 × maximum width, segment 4 subquadrate.

Wings. Forewing length, 1.8-2.0 mm (n=5); forewing without scales.

Genitalia (Figs 27-29, 44). Abdominal segment IX truncate proximally, distal margin of sternite shallowly excavated medially, bearing robust elongate setae. Tergite X, tapered slightly, apical margin concave. Gonopods in ventral view with ventral lobes scarcely longer than wide, dorsal lobes about with length about 2 × width, twice length of ventral lobes, mesal process digitiform, well developed, without setae; axillary seta slender, acute apically. Sclerotised rods of subgenital process narrowly bifid apically (arrow in Fig. 27). Phallic apparatus elongate, slender in proximal 2/3, stouter distally, with a slender spiny paramere.

Material examined.

Holotype male: New Caledonia: Province Sud, Sarraméa, 220 m, forest stream, loc 10 21°37.883'S, 165°51.958'E, Malaise trap, 18-21.xi.2001, Johanson, Pape & Viklund (MNHP).

Paratypes: New Caledonia: 1 male, collected with holotype; 3 males, Province Sud, W slope Mt. Ningua, Kwé Néco, Stream, at Camp Jacob, 3.7 km WNW summit of Mt. Ningua, on Boulouparis-Thio Road, about 50 m upstream road, 21°43.613'S, 166°06.567'E, 150 m, 29. xi– 12.xii.2003, Malaise trap, loc#054, K. A. Johanson (NHRS); 2 males, Province Nord, Wan Pwé On Stream, draining NNE side of Mt. Panié, 3.9 km NW Cascade de Tao, 20°31.820'S, 164°47.016'E, 18.xii.2003, light trap, loc#085, K. A. Johanson (NHRS).

Etymology.

In reference to the bilobed apices of the sclerotised rods in the male genitalia.