Agmina multidentata, 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 multidentata sp. nov. Figs 20-24

Diagnosis.

Agmina multidentata sp. nov. is distinguished from the other Agmina species by the presence of a pair of uniformly tapering, long superior appendages having deeply undulating ventral and mesal margins along their length; the inferior appendages forming rhomboid plates in lateral view; and tergum X forms a transverse bridge. It resembles A. cornuta sp. nov. in the shape of tergum X, but in A. multidentata sp. nov. the inferior appendages are higher in lateral view and the superior appendages are more prolonged posteriorly compared to those in A. cornuta sp. nov.

Etymology.

Multidentata, from Latin, meaning many teeth. Named for the ventral and mesal margins of the superior appendages with many teeth as seen in lateral view.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; 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, 5.0 km SW Pont Pérignon; 22°09.513'S, 166°39.942'E; 180 m; 6.xi-16.xi.2003; Malaise trap; loc#011; leg. KA Johanson; MNHN.

Paratypes: New Caledonia - Province Sud • 2 ♂; W part of Plaine des lacs, 150 m downstream bridge at La Capture; 22°15.967'S, 166°49.493'E; 261 m; 4-22.xi.2003; Malaise trap; loc#007; leg. KA Johanson; NHRS; • 1 ♂; stream crossing Nouméa-Yaté road, 1.5 km S Yaté Dam, approx. 200 m upstream the road; 22°09.931'S, 166°52.535'E; 197 m; 22.xi-17.xii.2003; Malaise trap; loc#041; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 2.8-3.6 mm (N = 4). Total length of genitalia: 0.5 mm.

Description.

Genitalia: In lateral view, segment IX triangular anteriorly, apex located mediodorsally; in ventral view anteriorly semi-circular. Sternal processes, lateral view, with each rounded apex not exceeding posterior apex of tergum X, triangular; in ventral view, broad, reaching mid-length of inferior appendage, slightly diverging, apices curving mesad. Tergum X small, in lateral view less than half the length of superior appendage, slightly longer than high, inner and outer margins almost straight, slightly diverging anteriorly, anterior margin concave; in dorsal view, mesally connected, axe-shaped. Parameres complex; in lateral view with tubular dorsal lobe running parallel with dorsal margin of tergum X and superior appendage, ending before mid-length of superior appendage; shorter, narrower, ventral lobe orientated posteroventrally; in dorsal view, dorsal lobes separated and narrowing along their length, not reaching mid-length of superior appendage, directed posteromesad, each with truncate apex. Superior appendages, in lateral view, more than twice as long as tergum X, tapering along its length with rounded base, apex semi-acute with stout megaseta orientated ventrad mesal process absent; in dorsal view uniformly narrow, running almost parallel, slightly curving inwards towards apex with stout megaseta directed mesad, inner margin dentate. Mesal processes absent. Inferior appendages, in lateral view, with posterad orientated triangular dorsal branch with acute apex; dorsal branch present as short, obtuse process at posteroventral margin in ventral view convex at base, gradually widening until mid-length, then tapering towards apex, dorsal branches orientated posteriorly, claw-shaped, with apices directed posteromesad, ventral branch barely visible as short very obtuse central lobe. Phallus, in lateral view as long as segment IX, almost straight with slightly concave margins in ventral view anterior half not distinctly wider than posterior half.

Additional information.

This species was referred to as "sp. 10" in Espeland and Johanson (2010a).

Figures

Figures 20 - 24. Agmina multidentata sp. nov. male holotype 20 genitalia, left lateral view 21 genitalia, dorsal view 22 genitalia, ventral view 23 phallus, lateral view 24 phallus, ventral view.