Agmina cornuta, 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 cornuta sp. nov. Figs 25-30

Diagnosis.

Agmina cornuta sp. nov. is distinguished from the other Agmina species by the presence of a pair of almost uniformly oval superior appendages in lateral view, and a pair of branches of the inferior appendages which appear beak-like in lateral view and are approx. as long as the superior appendages. It resembles A. multidentata sp. nov. in the shape of tergum X, but in A. cornuta sp. nov. the inferior appendages are lower in lateral view and the superior appendages are rounder posteriorly compared to those in A. multidentata sp. nov.

Etymology.

Cornuta, from Latin, meaning horned. Named for the shape of the inferior appendage in lateral view, which has two long, horn-shaped, dorsal branches.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Plateau de Dogny, northern part; 21°36.853'S, 165°52.548'E; loc#159 (32-2001); Malaise trap; 2-5.xii-2001; leg. KA Johanson, T Pape & B Viklund. MNHN.

Paratypes: 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; NHRS; • ♂; Mt. Dzumac, source stream of Ouinne River, near crossing point to mountain track; 22°02.073'S, 166°28.460'E; 810 m; 18.xi-4.xii.2003; Malaise trap; loc#030; leg. KA Johanson; NHRS; • ♂; Monts des Koghis, ca 300 m S Koghi Restaurant; 22.18288S, 166.50167E; 417 m; 2-16.xi.2003; Malaise trap; loc#004; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 3.2-4.1 mm (N = 4). Total length of genitalia: 0.5 mm.

Description.

Genitalia: In lateral view, segment IX semi-triangular anteriorly, apex located dorsally; in ventral view anteriorly widely U-shaped. Sternal processes, lateral view, with each apex, not exceeding posterior apex of tergum X, very short, triangular; in ventral view, short, slender, not reaching mid-length of inferior appendage, each with apex slightly curving mesad. Tergum X small, in lateral view approx. half the length of superior appendage, outer margin irregularly convex, slightly converging towards posterior with straight inner margin; in dorsal view, mesally connected, axe-shaped with inner margins forming a right triangle. Parameres starting at tergum X, in lateral view semi-circular, each with narrow protrusion orientated posteroventrad with blunt apex, approx. half the length of the main parameres; in dorsal view, separated, slightly diverging towards apices, outer margins straight for first 2/3, then abruptly curving inwards at obtuse angle, inner margin irregularly lobed. Superior appendages, in lateral view, approx. twice as long as tergum X, semi-ovoid with truncated, irregularly dentate apex, mesal process absent; in dorsal view almost parallel, each gently widening to mid-length, then inner margin abruptly widening, with apical half irregularly dentate. Mesal processes absent. Inferior appendages, in lateral view, with posterad orientated long, knife-shaped dorsal branch; ventral branch present as short, obtuse process at posteroventral margin; in ventral view convex at base, gradually widening for first 1/3, then abruptly narrowing towards apex, long, narrow, slightly tapering dorsal branches orientated posteriorly, slightly curving inwards, apices pointed, ventral branch indiscernible. Phallus, in lateral view shorter than segment IX, irregular; in ventral view posterior half slightly wider than anterior half.

Additional information.

This species was referred to as "sp. 53" in Espeland and Johanson (2010a).

Figures

Figures 25 - 30. Agmina cornuta sp. nov. male holotype 25 genitalia, left lateral view 26 genitalia, dorsal view 27 end of superior appendages, showing mesal spine, dorsal view 28 genitalia, ventral view 29 phallus, lateral view 30 phallus, ventral view.