Agmina christinae, 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 christinae sp. nov. Figs 222-226

Diagnosis.

Agmina christinae sp. nov. has inferior appendages that form a ventral plate with a broad basis and a long central process, which resemble the plate of A. piscaria sp. nov., but the plate of A. christinae sp. nov. is broader than that of A. piscaria sp. nov. It also resembles A. rhara by the presence of megasetae dorsally of the basis of the superior appendages. Agmina christinae sp. nov. is easily distinguished from A. rhara by having two branched inferior appendages in lateral view instead of three-branched inferior appendages, and the superior appendages of A. christinae sp. nov. are oval while those of A. rhara are long and narrow.

Etymology.

Christinae, named for one of the collectors of this species, Dr. Christine Pöllabauer.

Material examined.

Holotype: New Caledonia - Province Nord • ♂; stream in Creek de Bambou, 5 m N road RT7 Ouégoa-Koumac; 20°27.863'S, 164°19.784'E; 58 m; 19.xii.2003; Malaise trap; loc#087; leg. KA Johanson; MNHN.

Paratypes: New Caledonia - Province Nord • 1 ♂; same data as holotype, except NHRS; • 1 ♂; stream in Creek de Bambou, ca. 20 m upstream bridge on road RT7 Ouégoa-Koumac; 20°27.715'S, 164°20.978'E; 105 m; 19.xii.2003; Malaise trap; loc#086; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 3.8-4.5 mm (N = 3). Total length of genitalia: 0.8 mm.

Description.

Genitalia: In lateral view, segment IX almost truncate anteriorly, apex located dorsally; in ventral view with anterior incision widely and deeply V-shaped. Sternal processes, lateral view, with large, oval, somewhat stalked basally, almost symmetrical dorsal and ventral sides; in ventral view, wide basally, narrowing to midway, almost parallel-sided along distal half; orientated posteriorly. Tergum X strongly concave before pointing dorsally, in lateral view slightly higher than long; in dorsal view, mesally separate, each forming short lobes with rounded margins. Parameres starting from anterior part of tergum X, posteriorly with small membranous dorsal part and sclerotised ventral part, ventral part with cluster of megasetae visible above base of superior appendages on mid-length of inner margin, a hook-like curved spine situated apically on each paramere and situated on the inside of superior appendages; in dorsal view, anterior parts fused into a V-shaped suture, basal megasetae almost meeting mesally, distal hooks curving inwards along their length, situated immediately anteriorly of large mesal processes. Superior appendages, in lateral view, large, oval, somewhat stalked basally, almost symmetrical dorsal and ventral sides; in dorsal view slightly widening, straight, and converging along their length, with long, mesal process before apex. Inferior appendages, in lateral view, with two posteriorly orientated almost parallel branches in lateral view, dorsal branch with a long and thick posteriorly orientated seta on ventral margin, apex acute; ventral branch as long as dorsal branch and with pointed apex; in ventral view, ventral branch with almost square basal half and single-rayed, narrow, tapering distal half; dorsal branches forming a pair of narrow triangular processes curving mesally at apex. Phallus, in lateral view slightly shorter than segment IX, slender and slightly curving upwards; in ventral view with triangular lateral processes on anterior half, distal half approx. equally wide.

Additional information.

This species was referred to as "sp. 1" in Espeland and Johanson (2010a).

Figures

Figures 222 - 226. Agmina christinae sp. nov. male holotype 222 genitalia, left lateral view 223 genitalia, dorsal view 224 genitalia, ventral view 225 phallus, lateral view 226 phallus, ventral view.