Agmina sagittata, Espeland & Sjöberg & Johanson, 2020

Espeland, Marianne, Sjoeberg, Tin & Johanson, Kjell Arne, 2020, Description of 47 new species of the New Caledonian endemic caddisfly genus Agmina Ward & Schefter (Trichoptera, Ecnomidae), ZooKeys 956, pp. 49-162 : 49

Agmina sagittata sp. nov. Figs 31-35

Diagnosis.

Agmina sagittata sp. nov. is distinguished from the other Agmina species in the genitalia by the presence of a pair of inferior appendages having a ventral part that, in lateral view, reaches as far posteriorly as the sternal processes, and the apex of the sternal processes and inferior appendages are separated by a rectangular incision. It resembles A. circulata sp. nov. in the overall similarity of the genitalia, but A. circulata sp. nov. is larger than A. sagittata sp. nov., and in the genitalia A. sagittata sp. nov. has superior appendages that are more rounded in lateral view, shorter sternal processes in relation to the inferior appendages, and the sternal processes of A. sagittata sp. nov. is slightly wider and straighter than those of A. circulata sp. nov.

Etymology.

Sagittata, from Latin, meaning arrow-shaped. Named for the inferior appendages being arrow-shaped in ventral view.

Material examined.

Holotype: New Caledonia - Province Nord • ♂; Aoupinié Mt., Réserve spéciale de faune de l’Aoupinié, spring to side stream to Öröpömwati River; 21°08.386'S, 165°19.257'E; 402 m; 6-27.xii.2003; Malaise trap; loc#064; leg. KA Johanson; MNHN.

Paratypes: New Caledonia - Province Nord • 1 ♂; Réserve spéciale de faune de l’Aoupinié, ca 25 km S Poindimié, 21°08.940'S, 165°19.409'E, loc#147a (17-2001), Malaise trap; 24-28.xi.2001; leg. KA Johanson, T Pape & B Viklund; NHRS; • 1 ♂; ditto, except 21°09.775'S, 165°19.017'E; loc#148 (18-2001); Malaise trap; 24-28.xi.2001; leg. KA Johanson, T Pape & B Viklund; NHRS;

• 2 ♂; ditto, except 21°09.369'S, 165°19.209'E; loc#149 (19-2001); Malaise trap; 24-28.xi.2001; leg. KA Johanson, T Pape & B Viklund; NHRS; Province Sud • ♂; Monts Kwa Ne Mwa, along Nouméa-Yaté road, 2.0 km E Pic Mouirange, 20 m upstream road; 22°12.356'S, 166°40.798'E; 220 m; 15-16.i.2004; light trap; loc#120; leg. KA Johanson; NHRS; • ♂; Réserve spéciale de faune de la haute Yaté, along road on southern part of Marais de la Rivière Blanche, stream draining to Marais de la Rivière Blanche, 3.7 km SW Pont Pérignon; 22°09.327'S, 166°40.841'E; 180 m; 6-16.xi.2003; Malaise trap; loc#013; leg. KA Johanson; NHRS; • 1 ♂; Mt. Panié, Riv. Padyéém, 400 m, 22-28.xi.2001, Malaise trap 22-28.xi.2001, 20°34.122'S, 164°48.147'E, loc 146 (16-2001); leg. KA Johanson, T Pape & B Viklund; NHRS.

Measurements.

Fore wing length 3.2-4.1 mm (N = 8). Total length of genitalia: 0.5 mm.

Description.

Genitalia: Total length 0.4 mm. In lateral view, segment IX semi-triangular anteriorly, apex located dorsally; in ventral view anteriorly obround. Sternal processes, in lateral view, with each apex exceeding the length of tergum X, elongated narrowly triangular with semi-acute apex, dorsal margin almost straight, ventral margin gently concave; in ventral view, longer than inferior appendage, narrowing along their length, apex acute. Tergum X in lateral view irregularly quadrilateral, slightly longer than superior appendage, longer than wide, tapering along its length; in dorsal view, mesally separate, axe-shaped, inner margins forming triangle. Parameres starting before tergum X, in lateral view long, slowly widening along 2/3 of its length, then narrow, apex slender, multifurcated, ending before apex of superior appendage; in dorsal view, separated, long, slender, straight, apex pipe wrench-shaped. Superior appendages, in lateral view, shorter than tergum X, semi-trapezoid; in dorsal view stout, curving inwards, with rounded outer margin; mesal process, stout claw-like, directed mesad. Inferior appendages, in lateral view, with posterad orientated short, rectangular dorsal branch; ventral branch narrow, tubular with rounded apex, as long as sternal process; in ventral view sagittate, pointing anteriorly. Phallus, in lateral view shorter than segment IX, complex, ventral margin straight; in ventral view tubular, anterior end slightly wider than remainder.

Additional information.

This species was referred to as "sp. 21" in Espeland and Johanson (2010a).

Figures

Figures 31 - 35. Agmina sagittata sp. nov. male holotype 31 genitalia, left lateral view 32 genitalia, dorsal view 33 genitalia, ventral view 34 phallus, lateral view 35 phallus, ventral view.