Agmina magnahamata, 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 magnahamata sp. nov. Figs 52-57

Diagnosis.

Agmina magnahamata sp. nov. resembles many other Agmina species having short superior appendages with a large, strong mesally hook-shaped process that are present in other species, particularly in the Agmina sagittata species group. Agmina magnahamata sp. nov. resembles species with straight and posteriorly wide sternal processes, like A. digitata sp. nov. and A. circulata sp. nov., from which A. magnahamata sp. nov. is distinguished by the more complex parameres in the genitalia.

Etymology.

Magnahamata, from Latin, magna and hamata (noun feminine), meaning large hook. Named for the process originating from the superior appendage, which in dorsal view is large, broad and hook-shaped.

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.

Measurements.

Fore wing length 4.1 mm (N = 1). Total length of genitalia: 0.9 mm.

Description.

Genitalia: In lateral view, segment IX triangular anteriorly, apex located medially; in ventral view anteriorly widely U-shaped. Sternal processes, lateral view, with each apex exceeding the length of tergum X, almost reaching posterior margin of superior appendage; wide at base, then long, relatively slender, but slightly widening towards acute apex; in ventral view, almost twice as long as inferior appendage, parallel, slightly widening towards acute apex. Tergum X in lateral view largely rectangular, twice the length of superior appendage, longer than wide; in dorsal view, mesally fused, forming rounded lobe. Parameres starting before tergum X, reaching base of superior appendage, in lateral view, slender, slightly curving downwards, apex directed postero-dorsad, ventral surface with multiple wide setae directed ventrad; in dorsal view, first half parallel, long, slender, second half widening along its length, apex club shaped, on ventral surface multiple wide setae directed mesad. Superior appendages, in lateral view, largely quadratic, with large, broad hook-like process originating dorsally on posterior margin, curving downwards and back under main part, shorter than tergum X; in dorsal view stout, directed posterad, triangular, widening posteriorly, at posterior margin large hook-shaped protrusion with apex directed meso-anterad. Inferior appendages, in lateral view, with posterad orientated dorsal branch slightly longer than ventral branch, apices of both branches slightly converging, short, semi-acute, dorsal margin convex, ventral margin slightly concave; in ventral view widely bell-shaped at base, margins parallel, posterior margin concave with triangular central process. Phallus, in lateral view shorter than segment IX, slender, tubular, slightly curving downwards; in ventral view tubular, relatively wide, lateral lobes at anterior end.

Additional information.

This species was referred to as "sp. 42" in Espeland and Johanson (2010a).

Figures

Figures 52 - 57. Agmina magnahamata sp. nov. male holotype 52 genitalia, left lateral view 53 genitalia, dorsal view 54 parameres, dorsal view 55 genitalia, ventral view 56 phallus, lateral view 57 phallus, ventral view.