Agmina anterohamata, 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 anterohamata sp. nov. Figs 175-179

Diagnosis.

Agmina anterohamata sp. nov. is unique in the combination of having a long, narrow, and bifurcated superior appendage in lateral view together with a narrow and uniformly tapering sternal processes having a uniform dorsal curving along their length. Being armed with numerous megasetae on both dorsal and ventral branches of the superior appendage is also unique for this species.

Etymology.

Antero and hamata, from Latin, meaning anterior and hook-shaped. Referring to the forwardly curved hook at the posterior end of the superior appendages.

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, 2.25 km SW Pont Pérignon, 180 m, 6-16.xi.2003, Malaise trap, loc#010a; leg. KA Johanson; MNHN.

Paratype: New Caledonia - Province Sud • 1 ♂; 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, 1.35 km S Pont Pérignon; 22°08.496'S, 166°42.152'E; 180 m; 6-16.xi.2003; Malaise trap; loc 009a; leg. KA Johanson; NHRS.

Type locality.

New Caledonia, Province Sud, Réserve spéciale de faune de la haute Yaté.

Measurements.

Fore wing length 4.5-4.9 mm (N = 2). Total length of genitalia: 0.9 mm.

Description.

Genitalia: Total length 0.9 mm. In lateral view, segment IX low, long, rounded anteriorly, apex located dorsally in genitalia; in ventral view anterior incision widely and deeply U-shaped. Sternal processes, lateral view, with slightly arrow-head shaped, narrowing from mid-length, posterior part not produced posteriorly; in ventral view, slightly narrowing till mid-length, parallel-sided from mid-length and slightly diverging along their length, each with bifurcated apex. Tergum X trapezoid with sharply pointing anteriorly and rounded pointing posteriorly; dorsal margin straight; in dorsal view, mesally separate, mesal margin indistinctly triangular. Parameres anterior part slender in lateral view, starting well below and before tergum X, short anterior part orientated posteriorly, central part orientated posterodorsally, distal part divided into branch orientated posteroventrally and dorsal branch orientated posteriorly, not exceeding superior appendages posteriorly; in dorsal view, separated along their length, bifurcated at basis, orientated posterad, few stout setae present on dorsomesal faces immediately after end of tergum X; few long megasetae present in row on plate-like mesal process; distal part completely fused with superior appendages. Superior appendages, in lateral view, long, with posterodorsal corner strongly produced into strong anteroventrally orientated hook; posteroventral corner slightly produced posterad; dorsal margin almost straight; in dorsal view slender and almost parallel-sided except narrowing towards apex; apex curving mesally and anteriorly. Inferior appendages, in lateral view, with short, finger-like dorsal branch orientated posterodorsally, posteroventral corner right-angled, without branch; in ventral view forming a nearly oval shield almost completely hiding dorsal branches; dorsal branches separated by narrow, shallow incision. Phallus, in lateral view approx. as long as inferior appendages, straight, with pair of posteriorly orientated spines situated on posteroventral margin; in ventral view wide along its length.

Additional information.

This species was referred to as "sp. 3" in Espeland and Johanson (2010a).

Figures

Figures 175 - 179. Agmina anterohamata sp. nov. male holotype 175 genitalia, left lateral view 176 genitalia, dorsal view 177 genitalia, ventral view 178 phallus, lateral view 179 phallus, ventral view.