Agmina lata, 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 lata sp. nov. Figs 135-139

Diagnosis.

Agmina lata sp. nov. is characterised by having long posteriorly orientated sternal processes that are almost parallel-sided along their length. Also A. dathioensis sp. nov., A. rostrata sp. nov. and A. rougensis sp. nov. have long and parallel-sided sternal processes in lateral view, but in A. dathioensis sp. nov. and A. rougensis sp. nov. the sternal processes are orientated ventrally, not posteriorly. It is distinguished from A. rostrata sp. nov. by the absence of heavily sclerotised parameres inside the superior appendages.

Etymology.

Lata, from Latin, meaning wide. Referring to the wide sternal process 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, 2.25 km SW Pont Pérignon; 180 m; 6-16.xi.2003; Malaise trap; loc#010a; leg. KA Johanson; MNHN.

Measurements.

Fore wing length 4.0 mm (N = 1). Total length of genitalia: 0.6 mm.

Description.

Genitalia: In lateral view, segment IX rounded triangular anteriorly, apex located medially; in ventral view anteriorly U-shaped. Sternal processes, lateral view, with long, rectangular, of equal width throughout their length, dorsal margin widely triangular at mid-length, apex truncated; in ventral view, robust, slightly diverging, inner margin straight, outer margin widest before mid-length, apex truncated, slightly pointed mesally. Tergum X large, longer than wide, dorsal and ventral margins sigmoid, anterior margin concave; in dorsal view, mesally separate, longer than wide, posterior half rectangular, anterior part triangular. Parameres in lateral view long, slender, wider anteriorly, curving upwards toward apex forming looped structure not exceeding any margins of the superior appendage; in dorsal view, separated, anterior 2/3 parallel, diverging at posterior 1/3, then largely parallel, apex elongated club-shaped. Superior appendages, in lateral view, triangular, shorter than tergum X, mesal spine close to apex; in dorsal view short, triangular with convex lateral margin, apex rounded, long, thin, curved, spine-like process posteriorly on inner margin, directed mesad. Inferior appendages, in lateral view, forming a single knife-blade-shaped structure, with straight dorsal margin, convex ventral margin with shallow notch on anterior half; in ventral view slender, rounded, triangular at base, widest just before mid-length, then slightly tapering towards apex with two parallel posterior processes with rounded apex. Phallus, in lateral view much shorter than segment IX, tubular; in ventral view wider anteriorly.

Additional information.

This species was referred to as "sp. 5" in Espeland and Johanson (2010a).

Figures

Figures 135 - 139. Agmina lata sp. nov. male holotype 135 genitalia, left lateral view 136 genitalia, dorsal view 137 genitalia, ventral view 138 phallus, lateral view 139 phallus, ventral view.