Agmina curvatacua, 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 curvatacua sp. nov. Figs 180-184

Diagnosis.

Agmina curvatacua sp. nov. is unique among the Agmina species in that the pair of parameres form long, needle-shaped processed exceeding the posterior margin of the superior appendages; the basis of the inside of the superior appendages have the parameres with a cluster of posteromesad megasetae; and in lateral view, the sternal process tapers posteriorly and is curved ventrally before apex.

Etymology.

Curvata and acua, from Latin, curved and needle-shaped. Referring to the curved needle-shaped posterior part of the sternal processes.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Dumbea River, Branche Sud; 22°08.344'S, 166°30.147'E; 42 m; 3.xi.2003; light trap; loc#006; leg. KA Johanson; MNHN.

Paratype: New Caledonia - Province Sud • 1 ♂; Dothio River, 10 m E bridge at Atè, 6.2 km WNW Thio; 21°35.288'S, 166°09.070'E; 13 m; 29.xi.2003; light trap; loc#057; leg. KA Johanson; NHRS.

Type locality.

New Caledonia, Province Sud, Dumbea River.

Measurements.

Fore wing length 2.7-3.7 mm (N = 2). Total length of genitalia: 0.6 mm.

Description.

Genitalia: In lateral view, segment IX evenly triangular anteriorly, apex located little below midheight of genitalia; in ventral view anterior incision widely and deeply V-shaped. Sternal processes, lateral view, with almost rectangular with straight dorsal and ventral margins, posterior margin convex; in ventral view, slightly narrowing and diverging along their length, with rounded, posteriorly directed subapical region, apex narrow and curving mesally. Tergum X in lateral view rounded triangular posteriorly, dorsal margin with dorsally orientated process approx. at mid-length; longer than high; in dorsal view, mesally separate, mesal margin almost sigmoid. Parameres anterior part slender in lateral view, starting well below and before tergum X, anterior part orientated posteriorly, central part orientated posterodorsally, distal part orientated posteroventrally and exceeding superior appendages posteriorly; in dorsal view, separated along their length, broad at basis, orientated posterad, few stout setae present on dorsomesal faces immediately after end of tergum X; long megasetae present in row on small plate-like mesal process; distal part separated from superior appendages and almost tangential before curving laterally before mesally pointing end. Superior appendages, in lateral view, almost rectangular with straight dorsal and ventral margins, posterior margin convex; in dorsal view forming parallelogram-shaped lobes with almost straight lateral and undulating mesal margins. Inferior appendages, in lateral view, with short, thick dorsal and ventral branches, dorsal branch curving slightly upward into triangular apex, ventral orientated posteriorly into rounded apex; ventral branch almost reaching as far posteriorly as sternal process; in ventral view with ventral branches forming narrowly diamond-shaped plate, almost arrow-like with rounded anterior and pointed posterior ends; dorsal branches divided by narrow, V-shaped incision above ventral branches. Phallus, in lateral view straight, approx. as long as width of genitalia; in ventral view widest immediately before mid-length, distal part almost parallel-sided.

Additional information.

This species was referred to as "sp. 2" in Espeland and Johanson (2010a).

Figures

Figures 180 - 184. Agmina curvatacua sp. nov. male holotype 180 genitalia, left lateral view 181 genitalia, dorsal view 182 genitalia, ventral view 183 phallus, lateral view 184 phallus, ventral view.