Agmina amplexa, 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 amplexa sp. nov. Figs 105-109

Diagnosis.

Agmina amplexa sp. nov. is unique in the genus in that the superior appendages are strongly modified with three strong hooks that are orientated mesad as seen in dorsal view. Also A. complexa sp. nov. have strongly modified superior appendages with large hooks but in A. complexa sp. nov. there are only one pair, which are strongly curved anteriorly instead of directed mesally, as seen in dorsal view.

Etymology.

Amplexa, from Latin, meaning embrace. Named for the superior appendages in dorsal view encircling each other.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Mt. Dzumac, source stream of Ouinne River, downstream crossing point to mountain track; 22°01.997'S, 166°28.486'E; 795 m; over ca. 30 m waterfall; 18.xi-4.xii.2003; Malaise trap; loc#031; leg. KA Johanson; MNHN.

Paratype: New Caledonia - Province Sud • 1 ♂; Mt. Dzumac, source stream of Ouinne River, at crossing point to mountain track; 22°02.218'S, 166°28.566'E; 797 m; 18.xi.2003; light trap; loc#032; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 3.5-4.2 mm (N = 2). Total length of genitalia: 0.7 mm.

Description.

Genitalia: In lateral view, segment IX narrowly U-shaped anteriorly, apex located mesally; in ventral view anteriorly ovoid. Sternal processes, lateral view, with each apex reaching posterior half of superior appendage, straight, directed posterad, narrowing along its length, apex acuminate. in ventral view, diverging, lateral margins convex, mesal margins slightly convex anteriorly, apices acuminate. Tergum X in lateral view triangular; in dorsal view, narrowly triangular with concave posterior margin. Parameres absent. Superior appendages, in lateral view, twice as long as tergum X, saddle-shaped with spine like ventral process, two tubular, curving mesal processes, the anterior largely parallel with dorsal margin, apex blunt, the posterior parallel with posterior margin with acute apex; in dorsal view long, anterior half straight, parallel, curved mesad at 90 degree angle at mid-length, tapering along its length, apex claw-like directed anterad; main branch bifurcating anteriorly, with slender mesal branch curving upwards with acuminate apex; second, narrowly triangular mesal branch originating between first mesal branch and the curve of main branch. Inferior appendages, in lateral view, with posterad orientated large, lobe-like, acute dorsal branch, ventral branch in the form of small tooth; in ventral view dorsal branch forming long, slender shape with convex margins and two slender, slightly converging posterior processes, ventral branch forming small central tooth. Phallus, in lateral view shorter than segment IX, tubular, straight, with anterior lateral lobes; in ventral view slightly wider posteriorly, thin lateral lobes anteriorly.

Additional information.

This species was referred to as "sp. 8" in Espeland and Johanson (2010a).

Figures

Figures 105 - 109. Agmina amplexa sp. nov. male holotype 105 genitalia, left lateral view 106 genitalia, dorsal view 107 genitalia, ventral view 108 phallus, lateral view 109 phallus, ventral view.