Agmina cerritula, 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 cerritula sp. nov. Figs 79-83

Diagnosis.

Both Agmina cerritula sp. nov. and A. monstrosa sp. nov. have genitalia with inferior appendages that are fused into a single, very long, slender and dorsally curving process, which make them easily recognised from other Agmina species. Agmina cerritula sp. nov. is distinguished from A. monstrosa sp. nov. by having less strongly narrowing sternal processes in lateral view and that the apex is more truncated, and the superior appendages are broader posteriorly compared to those in A. monstrosa sp. nov. Agmina recurvata sp. nov. have similar inferior appendages in lateral view, but in this species the long processes are paired, not simple as in A. serricula sp. nov.

Etymology.

Cerritula, from Latin, meaning weird. Named for the weirdly shaped inferior appendage.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Creek Pernod, 7 m downstream bridge at Route du Carénage on Lac Yaté-Prony road; 22°10.862'S, 166°50.565'E; 162 m; 10.xii.2003; light trap; loc#076; leg. KA Johanson; MNHN.

Measurements.

Fore wing length 4.4 mm (N = 1). Total length of genitalia: 0.8 mm.

Description.

Genitalia: In lateral view, segment IX sharply triangular anteriorly, apex located ventrally; in ventral view anteriorly oval. Sternal processes, lateral view, with each apex exceeding apex of superior appendage, robust, largely of equal width throughout its length, margins slightly sigmoid, apex widely rounded, ventrally with short spine-like process directed posteroventrad; in ventral view, very long, tapering along their length, margins almost straight, apex blunt with short, spine-like process directed posteromesad. Tergum X in lateral view saddle-shaped, anteriorly triangular with straight dorsal margin, slightly longer than superior appendage; in dorsal view, mesally fused, almost rectangular, inner margins forming wide V-shape. Parameres starting before tergum X, in lateral view slightly widening along its length, with convex dorsal margin until mid-length, then narrowing before again widening, forming long loop at apex running parallel with ventral margin, and reaching ventral posterior corner of superior appendage; in dorsal view, separated, slender, first 1/3 slightly diverging, second 1/3 widening and diverging, third 1/3 initially parallel, then curving laterally and looping anterad. Superior appendages, in lateral view, axe-blade shaped with posterior margin slightly dentate, slightly shorter than tergum X; in dorsal view very stout, equally long as wide, almost rectangular, apex truncated, mesally with stout claw-like process directed anteromesad, followed by two small triangular processes of diminishing size. Inferior appendages, in lateral view, slender, longer than sternal process, initially directed posteroventrad, then greatly curving, forming a wide U-shape, with acuminate apex directed dorsad posterodorsally of apex of sternal process; in ventral view long, slender, tubular with straight margins, longer than sternal processes, apex acute. Phallus, in lateral view almost as long as segment IX, slender, tubular, straight, with long spine-like process near anterior end; in ventral view tubular, slightly wider at base with rounded lateral lobes and sheet-like structure.

Additional information.

This species was referred to as "sp. 46" in Espeland and Johanson (2010a).

Figures

Figures 79 - 83. Agmina cerritula sp. nov. male holotype 79 genitalia, left lateral view 80 genitalia, dorsal view 81 genitalia, ventral view 82 phallus, lateral view 83 phallus, ventral view.