Agmina spina, 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 spina sp. nov. Figs 156-160

Diagnosis.

In ventral view, the inferior appendages of Agmina spina sp. nov. form a narrow plate with a posteroapical incision laterally flanged by a row of small setae, similar to that of A. complexa sp. nov., A. guttata sp. nov., and A. amieuensis sp. nov. Agmina spina sp. nov. also have very short sternal processes in lateral view, as also present in A. guttata sp. nov. and A. amieuensis sp. nov. Agmina spina sp. nov. is distinguished from the other species by the narrow and tapering superior appendages in lateral view.

Etymology.

From Latin spina (noun, feminine), meaning spine. Named for the spine-like shape of the superior appendage.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Plateau de Dogny; 21°37.000'S, 165°52.500'E; 846 m; loc#145 (15-2001); Malaise trap; 18-21.xi.2001; leg. KA Johanson, T Pape & B Viklund; MNHN.

Measurements.

Fore wing length 4.1 mm (N = 1). Total length of genitalia: 0.5 mm.

Description.

Genitalia: In lateral view, segment IX widely bell-shaped, apex located medially; in ventral view anteriorly oval. Sternal processes, lateral view, with tapering along their length, ventral margin almost straight, apex slender, rounded; in ventral view, slightly diverging, of nearly equal width throughout their length, abruptly narrowing towards rounded apex. Tergum X almost quadratic with concave anterior and posterior margin, drawn-out anteroventral corner; in dorsal view, widely mesally separated, twice as long as wide, outer margins convex, inner margins straight, but slightly undulating. Parameres originating at tergum X, in lateral view forming complex structure with looped apex; in dorsal view, slender, anterior part slightly converging, posterior part diverging, apex not readily visible. Superior appendages, in lateral view, exceeding length of tergum X, wider at base, then slender, spine-like, straight, with acute apex; in dorsal view long, slender, slightly curving, converging towards acute apex. Inferior appendages, in lateral view, with bifurcated anterior half, ventral process straight, exceeding ventral margin of sternal process, posterior part forming a single narrowing lobe with rounded apex directed posteromesad, exceeding posterior margin of sternal process; in ventral view slender with convex margin, two acute, thin, posterior processes at apex. Phallus, in lateral view not exceeding length of segment IX, tubular, slightly curving; in ventral view wider anteriorly, with irregular lateral processes at mid-length.

Additional information.

This species was referred to as "sp. 40" in Espeland and Johanson (2010a).

Figures

Figures 156 - 160. Agmina spina sp. nov. male holotype 156 genitalia, left lateral view 157 genitalia, dorsal view 158 genitalia, ventral view 159 phallus, lateral view 160 phallus, ventral view.