Agmina tenuisa, 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 tenuisa sp. nov. Figs 15-19

Diagnosis.

Agmina tenuisa sp. nov. is distinguished from the other Agmina species by the presence of a pair of slender superior appendages, each with a long and slightly undulating mesal process reaching as far posteriorly and on the same height as the apex of the superior appendages; and the presence of a pair of parameres, each ending in the superior appendages and angling ventrally with apical part orientated ventrally below the superior appendages. The genitalia of Agmina tenuisa sp. nov. resemble those of Agmina padi Ward & Schefter, 2000, particularly in the shape of the inferior appendages in lateral view. Agmina tenuisa sp. nov. is distinguished from A. padi by the more slender superior appendages in lateral view, the ventral branch of the parameres exceeding below the superior appendages, and in ventral view the plate of inferior appendages has no central posterior plate.

Etymology.

Tenuisa, from Latin, meaning slender. Named for the slender superior appendages as seen in lateral view.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Haute Yaté fauna reserve, 1760 m S bridge Pont Perignon, 50 m upstream bridge over stream; 22.14954S, 166.701211E; 180 m; 14.xii.2003-13.i.2004; Malaise trap; loc#081; leg. KA Johanson; MNHN.

Paratypes: New Caledonia - Province Sud • 1 ♂; stream crossing way to Sanatorium 2.3 km E St. Laurent, ca. 30 m downstream bridge; 22°04.484'S, 166°19.900'E; 15.xi.2003; light trap; loc#028; leg. KA Johanson; NHRS; 1 ♂; Koghi Mt., 522 m, source of Riv. Oueanoue; 22°10.327'S, 166°30.524'E; Malaise trap; 12-16.xi.2001; loc 138 (01-2001); leg. KA Johanson, T Pape & B Viklund; NHRS; Province Nord • 1 ♂; Mt Mé Amélié, River Fö Töpliba, upstream bridge on rd Sarraméa-Koh, at banana plantation; 21°37.940'S, 165°49.619'E; loc 144 (14-2001); Malaise trap; 18-21.xi.2001; leg. KA Johanson, T Pape & B Viklund; NHRS.

Measurements.

Fore wing length 2.9-3.4 mm (N = 4). Total length of genitalia: 0.5 mm.

Description.

Genitalia: In lateral view, segment IX triangular anteriorly, apex located medially; in ventral view anteriorly U-shaped. Sternal processes, lateral view, with each apex not exceeding posterior margin of tergum X, short, triangular; in ventral view, short, not reaching mid-length of inferior appendage, slightly diverging along their length, apices slightly curving mesad. Tergum X small, in lateral view around half the length of inferior appendage, dorsal margin straight, ventral margin slightly convex; in dorsal view, mesally separate, semi-trapezoid, outer margins straight, inner margin slightly convex. Parameres starting at anterior margin of tergum X; in lateral view, long, slender, widely U-shaped, with posterior end slightly diverging, apex pointing posteroventrally; in dorsal view, separated, narrow, posterior 1/3 directed posteromesad, each with short, thick, setae at apex. Superior appendages, in lateral view, slender, slightly curving upwards, more than twice as long as tergum X, with spine-like process at apex, mesal process spine-like straight, slightly curving downwards at base, exceeding posteriorly the main branch; in dorsal view around four times longer than wide, almost parallel, each slightly curving inwards toward apex with thin posteromesad orientated process with long thick seta. Mesal processes long, slender, gently curving mesad, crossing each other near apex. Inferior appendages, in lateral view, with posterodorsally orientated claw-shaped dorsal branch, ventral branch short, claw-shaped, orientated posterodorsally, originating at approx. mid-length on ventral margin of dorsal branch; in ventral view small, oval at base with slender, posteriorly orientated dorsal branches, slightly converging towards apex, ventral branches directed posterolaterally, each with claw-shaped apex. Phallus, in lateral view as long as segment IX, slightly sigmoid; in ventral view anterior half distinctly wider than posterior half.

Additional information.

This species was referred to as "sp. 12" in Espeland and Johanson (2010a).

Figures

Figures 15 - 19. Agmina tenuisa sp. nov. male holotype 15 genitalia, left lateral view 16 genitalia, dorsal view 17 genitalia, ventral view 18 phallus, lateral view 19 phallus, ventral view.