Agmina ninguana, 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 ninguana sp. nov. Figs 232-236

Diagnosis.

Agmina ninguana sp. nov. is very similar to both A. scopula sp. nov. and A. hexacantha in having very broad inferior appendages in lateral view, each with a dorsally curved ventral branch. They also have a group of mesally orientated megasetae in the central part of the mesal face of the superior appendages. Agmina ninguana sp. nov. is distinguished from A. hexacantha by the broader and shorter sternal processes in lateral view and from A. scopula sp. nov. by the straighter dorsal margin of the superior appendages and much narrower sternal process.

Etymology.

Ninguana, derived from Mont Ningua, the type locality of the species.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; western part of Mt. Ningua, Kwé Néco Stream, 3.9 km W summit of Mt. Ningua, on Boulo-Thio Road, ca. 50 m upstream road; 21°44.359'S, 166°06.009'E; 117 m; 20.xi.2003-12.xii.2003; Malaise trap; loc#035; leg. KA Johanson; MNHN.

Paratypes: 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; • 1 ♂; W slope Mt. Ningua, Kwé Néco Stream, at Camp Jacob, 3.7 km WNW summit of Mt. Ningua, on Boulo-Thio Road, ca. 50 m upstream road; 21°43.613'S, 166°06.567'E; 150 m; 29.xi-12.xii.2003; Malaise trap; loc#054; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 3.4-4.5 mm (N = 3). Total length of genitalia: 0.6 mm.

Description.

Genitalia: In lateral view, segment IX narrowly rounded anteriorly, apex located dorsally; in ventral view anterior incision widely U-shaped. Sternal processes, lateral view, with large, almost half-spherical with straight dorsal margin; in ventral view, slender, basal part slightly orientated mesally, bent posteriorly at mid-length. Tergum X sharply pointing dorsally, higher than long in lateral view; in dorsal view, mesally separate, each forming short lobes with almost straight inner margins. Parameres weakly developed, starting at basis of tergum X; in lateral view, bending upwards and meeting superior appendage basally at dorsal margin; in dorsal view, almost invisible, with group of stout, strictly mesally orientated megasetae. Superior appendages, in lateral view, large, almost half-spherical with straight dorsal margin; in dorsal view, narrowly parallel-sided along their length, smoothly convex lateral margins; apex with stout, finger-like spine pointing mesally. Inferior appendages, in lateral view, with ventral margin uniformly convex along its length; dorsal branch orientated strictly upwards, sharply triangular, with very long posterior margin ending in well separated ventral branch; ventral branch curving upwards along its length, with acute apex; in ventral view, with large central plate being approx. as long as wide, with convex lateral margins and triangular anteriorly; posteriorly with pair of long, widely separated processes curving mesally along their length. Phallus, in lateral view, much shorter than segment IX, straight; in ventral view, triangular with rounded anterior margin and pointed posteriorly.

Additional information.

This species was referred to as "sp. 25" in Espeland and Johanson (2010a).

Figures

Figures 232 - 236. Agmina ninguana sp. nov. male holotype 232 genitalia, left lateral view 233 genitalia, dorsal view 234 genitalia, ventral view 235 phallus, lateral view 236 phallus, ventral view.