Agmina rostrata, 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 rostrata sp. nov. Figs 115-119

Diagnosis.

Agmina rostrata sp. nov. is characterised by having long posteriorly orientated sternal processes that are almost parallel-sided along their length, and heavily sclerotised parameres with posterior part orientated dorsally and deeply bifurcated in lateral view. Also A. dathioensis sp. nov., A. rougensis sp. nov. and A. lata sp. nov. have long and parallel-sided sternal processes in lateral view. Agmina rostrata sp. nov. is distinguished from A. dathioensis sp. nov. in that the sternal process is orientated posteriorly, not ventrally; and from A. lata sp. nov. in the slightly narrower sternal process in lateral view, and absence of megasetae on the posterior apex of the parameres on the mesal face of the superior appendages.

Etymology.

Rostrata, from Latin, meaning beak-shaped. Named for the medial processes on the superior appendage in ventral view, together forming a beak-shaped process.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Dumbea River, Branche Nord, 2.2 km SE summit of Mt. Piditéré; 22°07.503'S, 166°29.899'E; 25 m; 21.i.2004; light trap; loc#124a; leg. KA Johanson & C Pöllabauer; MNHN.

Paratype: New Caledonia - Province Sud • 1 ♂; same data as holotype; • 1 ♂; Dumbea River, Branche Sud; 22°08.344'S, 166°30.147'E; 42 m; 3.xi.2003; light trap; loc#006; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 2.9-3.5 mm (N = 2). Total length of genitalia: 0.5 mm.

Description.

Genitalia: In lateral view, segment IX sharply triangular anteriorly, apex located dorsally; in ventral view anteriorly shallowly oblong. Sternal processes, lateral view, with each apex almost reaching apex of superior appendage, gently tapering along its length, slightly anti-sigmoid, apex truncated; in ventral view, parallel, of similar width throughout its length, slightly bulging at mid-length, apex acute, directed mesad. Tergum X in lateral view trapezoid, shorter than superior appendage, in dorsal view, mesally fused, semi-rectangular with rounded posterior corners, inner margin forming shallow, wide U. Parameres in lateral view complex, multi-branched, anteriorly directed posteromesad, then turning posterodorsad at 90 degree angle, gradually widening with two-pronged apex directed dorsad, mesal branch originating close to 90 degree angle, with wide circular apex; in dorsal view, widest at mid-length, there with large open beak-shaped protrusion directed mesad. Superior appendages, in lateral view, irregularly axe-blade shaped with acute, tooth-shaped apex dorsally, dorsal margin slightly concave, ventral margin convex; in dorsal view, obtuse triangular with apex directed mesally. Inferior appendages, in lateral view, with dorsoanterad orientated slender dorsal branch with hooked, acute apex, ventral branch directed dorsoposterad, wider, shorter, with semi-acute apex, both branches exceeding dorsal margin of sternal process; in ventral view slender, with convex lateral margins, narrow, rounded anteriorly, slightly widening towards mid-length, ventral branch forming two broad posterior processes with blunt apices. Phallus, in lateral view shorter than segment IX, slightly narrowing along its length, posterior end acute; in ventral view irregular.

Additional information.

This species was referred to as "sp. 4" in Espeland and Johanson (2010a).

Figures

Figures 115 - 119. Agmina rostrata sp. nov. male holotype 115 genitalia, left lateral view 116 genitalia, dorsal view 117 genitalia, ventral view 118 phallus, lateral view 119 phallus, ventral view.