Agmina longicordata, 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 longicordata sp. nov. Figs 58-63

Diagnosis.

Agmina longicordata sp. nov. is distinguished from the other Agmina species by the inferior appendages in ventral view, which plate is narrowly heart-shaped and with a median process originating from the middle of its posterior margin. It is also unique by the presence of a group of small ventrally orientated setae densely arranged in a small circular area on each paramere. In addition, the sternal processes are almost boomerang-shaped, with each of the posterior part orientated in parallel. The shape of the plate formed by the inferior appendages is somewhat similar to that of A. sagittata sp. nov. and A. circulata sp. nov. but is easily separated from those species on the other characters. It resembles A. longispina sp. nov. in the presence of a group of densely arranged setae at the posterior part of the parameres. Agmina longicordata sp. nov. is easily separated from A. longispina sp. nov. by the oval shape of the inferior appendage plate in ventral view.

Etymology.

Longicordata, from Latin, longi and cordata, meaning long and heart-shaped. Named for the shape of the inferior appendage, which is shaped like an elongated heart.

Material examined.

Holotype: New Caledonia - Province Nord • ♂; Wan Pwé On Stream, draining NNE side of Mt. Panié, 3.9 km NW Cascade de Tao; 20°31.820'S, 164°47.016'E; 18.xii.2003; light trap; loc#085; leg. KA Johanson; MNHN.

Paratypes: New Caledonia - Province Nord • 1 ♂; same data as holotype, except NHRS; • 1 ♂; Wé Caot Stream, draining NNE side of Mt. Panié, 0.9 km NW Cascade de Tao; 20°33.311'S, 164°48.064'E; 18.xii.2003; light trap; loc#084; leg. KA Johanson; NHRS; • 1 ♂; Mt. Panié, Riv. Padyéém; 400 m; 22-28.xi.2001; Malaise trap; 22-28.xi.2001; 20°34.122'S, 164°48.147'E, loc#146 (16-2001); leg. KA Johanson, T Pape & B Viklund; NHRS.

Etymology.

Cornuta, from Latin, meaning bill of a bird. Named for the shape of the inferior appendage in lateral view, which is long, beak-like.

Measurements.

Fore wing length 2.4-4.0 mm (N = 4). Total length of genitalia: 0.7 mm.

Description.

Genitalia: In lateral view, segment IX sharply triangular anteriorly, apex located medially; in ventral view anteriorly widely oblong. Sternal processes, lateral view, with each apex exceeding the length of superior appendage, narrowing along its length, curving downwards, apex acute, spine-like; in ventral view, robust, first half slightly diverging, second half converging, wider than first half, narrower blunt apices parallel with very straight inner margin, small spine-like process at apex, directed posteromesad. Tergum X in lateral view irregularly quadrilateral with concave anterior margin, tapering towards posterior, slightly longer than superior appendage; in dorsal view, mesally fused, inner margins forming wide U-shape with small, spine-like central process. Parameres starting around the base of tergum X, in lateral view, straight, tubular, with apex widening, sharply curving ventrad, ventral surface with large amounts of wide setae directed ventroanterad; in dorsal view, robust, finger-like, outer margins convex, inner margins concave, apex rounded with large amounts of mesally directed, wide setae on inner margin. Superior appendages, in lateral view, largely rectangular, longer than wide, slightly shorter than tergum X; in dorsal view almost parallel, outer margins straight, inner margins sigmoid; bent sharply mesally at apex, ending with claw-like structure directed mesoanterad. Inferior appendages, in lateral view, with posterad orientated, rounded, lobe-like dorsal branch, ventral branch longer, tapering along its length, ventral margin straight, convex towards acute apex; in ventral view elongated cordate, posterior margin concave with large triangular central process; Phallus, in lateral view approx. half the length of segment IX, dorsal margin sigmoid, ventral margin straight; in ventral view widest at mid-length, anteriorly with lateral lobes.

Additional information.

This species was referred to as "sp. 29" in Espeland and Johanson (2010a).

Figures

Figures 58 - 63. Agmina longicordata sp. nov. male holotype 58 genitalia, left lateral view 59 genitalia, dorsal view 60 parameres, dorsal view 61 genitalia, ventral view 62 phallus, lateral view 63 phallus, ventral view.