Mecynostomella brevis Johanson 2003, sp.n.
Creators: name: Johanson, Kjell Arne
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Kokiriidae
Mecynostomella
Mecynostomella brevis

description: Mecynostomella brevis sp.n.
(Figs 9, 23­27, 54)
Material examined: Male holotype: stream, Val de l'Hermitage, 1 km NE Terr. Route 1, 76 m, 10.x.1972 (N34) [W.L. & J.G. Peters] (ROM, alcohol). 1 male paratype: Trib. of Karionan Riv., 5 km NW Païta, 122 m (N54), 14.xi.1972 [W.L. & J. G. Peters] (NRM, alcohol).
Etymology: brevis, from Latin, meaning short, referring to the lateral branch of the genitalia being smaller than that of Mecynostomella spinosa. To be treated as a noun in apposition.
Diagnosis: This species can be distinguished from hollowayi, sigma, flinti and fusca by the forewings with no area of modified sensillae; these sensillae are also lacking in caledonia and spinosa. Unique characters include a very shallowly incised posteroventral margin of the segment IX, a median branch located ventrally on the lateral branch, and a group of spines on the ventral margin of the phallic endotheca.
Male.
Colors faded. Antennal flagellum with 38 flagellomeres.
Thorax: Pronotum with setae confined to large warts.
Wings (Fig. 9): Forewing length 9.6 mm (N=1), greyish­black, hind wing 8.4 mm (n=1), grey. Venation as described for genus.
Genitalia (Figs 23­27): Segment IX, lateral view (Fig. 23), about 2.3x higher than long; anterior margin shallowly ellipsoidal, dorsally pointed; ventral margin shallowly and widely incised posteriorly (Fig. 25). Segment X with simple central branch almost parallel­sided at distal half in dorsal view (Fig. 24); in lateral view (Fig. 23), almost parallelsided along proximal half and strongly tapered distally; dorsal margin bent ventrally at mid­length; with few setae on distal half; nearly 2x longer than high (Fig. 23); apex narrowly rounded in lateral view, slightly incised in dorsal view (Fig. 24); lateral branch nearly as long as central branch; tubular, sub­straight in lateral (Fig. 23) and dorsal (Fig. 24) views; short setae confined to apex and ventral sub­apical margin; median branch, lateral view (Fig. 23), large, semicircular, about as long as lateral branch; in dorsal view (Fig. 24), oriented posteriorly, visible between central and lateral branches, pointed. Gonocoxite, lateral view (Fig. 23), generally curving dorsally along its length; dorsal margin concave, ventral margin sub­straight, apex produced dorsally; slender sub­apical part about 0.8x as high as proximal part; in ventral view (Fig. 25) oriented posteriad along its length; covered by setae along its length but most numerous at apex. Phallus simple; phallobase, lateral view (Fig. 26), length about three­quarts the height of segment IX; endotheca produced dorsally from distal half on dorsal side, with small spines on ventral margin; in ventral view (Fig. 27), lateral incisions at proximal part located posteriorly of anterior margin of phallus opening.
Female: unknown.
description: Published as part of Johanson, Kjell Arne, 2003, Revision of the New Caledonian genus Mecynostomella (Trichoptera, Kokiriidae), pp. 1-24 in Zootaxa 270 (1) on pages 10-12, DOI: 10.11646/zootaxa.270.1.1, http://zenodo.org/record/5014321