Agmina rougensis, 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 rougensis sp. nov. Figs 125-129

Diagnosis.

Agmina rougensis sp. nov. is characterised by having long ventrally orientated sternal processes that are almost parallel-sided along their length. Also A. dathioensis sp. nov., A. rostrata sp. nov. and A. lata sp. nov. have long and parallel-sided sternal processes in lateral view, and A. rougensis sp. nov. is particularly similar to A. dathioensis sp. nov. by the ventral orientation of the sternal processes. Agmina rougensis sp. nov. is distinguished from A. rostrata sp. nov., A. dathioensis sp. nov., and A. lata sp. nov. by having a much more slender sternal processes in lateral view.

Etymology.

Rougensis, named for Rivière Rouge, the type locality of the species.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Plaine des Gaïacs, Rivière Rouge, 14.2 km NW summit of Mt. Rouge, 50 m upstream road RT1 Nouméa-Koné; 20°31.573'S, 164°46.690'E; 23 m; 2.i.2004; light trap; loc#104; leg. KA Johanson; MNHN.

Measurements.

Fore wing length 4.0 mm (N = 1). Total length of genitalia: 0.9 mm.

Description.

Genitalia: In lateral view, segment IX sharply triangular anteriorly, apex located dorsally; in ventral view anteriorly U-shaped. Sternal processes, lateral view, with each apex exceeding apex of superior appendage, anterior half wide, tapering along its length, posterior half, long, slender, spine like with acute apex; in ventral view, robust, twice as long as inferior appendage, tapering along their length, converging, apex acute. Tergum X in lateral view quadratic with mesoanterad corner drawn out, equally long as high, in dorsal view, mesally fused with wide bridge, wide rounded lobe with two short, tooth-like protrusion, inner margin forming very shallow, wide V. Parameres starting at tergum X, in lateral view, short structure approx. four times longer than wide, with truncated apex barely exceeding the dorsal margin of superior appendage; in dorsal view, slender, hardly discernible structure. Superior appendages, in lateral view, irregular posterior half wider than anterior half, apex with claw-like process dorsally, directed ventrad, more than twice the length of tergum X; in dorsal view relatively long, slender, slightly converging towards apex, narrowing along its length, short, acute, claw-like apex sharply curving mesad. Inferior appendages, in lateral view, with dorsoanterad orientated dorsal branch, initially wider, then tapering towards apex, ventral branch with wide, club-shaped apex, ventral branch exceeding dorsal margin of sternal process, main structure slightly exceeding ventral margin of superior appendage; in ventral view narrow anteriorly, widening until mid-length, then straight, slightly narrowing, with ventral branch forming two slightly narrowing processes with rounded apex and tooth orientated mesad. Phallus, in lateral view much shorter than segment X, tubular, almost straight; in ventral view tubular with anterior triangular lateral lobes.

Additional information.

This species was referred to as "sp. 44" in Espeland and Johanson (2010a).

Figures

Figures 125 - 129. Agmina rougensis sp. nov. male holotype 125 genitalia, left lateral view 126 genitalia, dorsal view 127 genitalia, ventral view 128 phallus, lateral view 129 phallus, ventral view.