Revision of the New Caledonian genus Mecynostomella (Trichoptera, Kokiriidae) Author Johanson, Kjell Arne text Zootaxa 2003 2003-08-19 270 1 1 24 https://biotaxa.org/Zootaxa/article/view/zootaxa.270.1.1 journal article 5499 10.11646/zootaxa.270.1.1 47bf26ef-e77a-4a5e-ab7c-65a7519ad79d 1175­5334 5014321 F3A8692C-40EF-462D-BC00-235F008A4798 Mecynostomella sigma sp.n. ( Figs 41­45 , 53 ) Material examined: Male holotype : E Col d'Amieu Forestry Station , 320 m , 17.vi.1971 (#26) [ J.D. Holloway ] ( ROM , alcohol) . Etymology: sigma , from the Latin letter S ( sigma ), referring to the shape of the gonocoxite. To be treated as a noun in apposition. Diagnosis: M. sigma has a pale area in the forewings as in hollowayi . In sigma , the lateral branches are sub­straight and short, and the median branches proceed the lateral branch apices. Male. Colors faded. Antennal flagellum broken. Thorax: Pronotum with few dorsolateral, stout, dark brownish setae confined to large, distinct warts. Wings: Forewing length 11.3 mm (n=1), hind wing length 9.8 mm (n=1). Forewings pale brownish; distinct pale area between Cu and A as in hollowayi (in Fig. 6 ). Hind wing pale grey. Venation as described for genus Genitalia ( Figs 41­45 ): Segment IX, lateral view ( Fig. 41 ), about 2.1x higher than long; anterior part shallowly produced, margin smoothly rounded; dorsal margin rounded; posteroventral margin with wide, anteriorly sub­straight incision ( Fig. 43 ). Segment X simple; in dorsal view ( Fig. 42 ), central branch nearly parallel­sided at distal half; in lateral view ( Fig. 41 ), nearly parallel­sided proximally, tapers distally; dorsal margin bent ventrally at mid­way; apex covered by setae, few setae present on lateral margin; segment X nearly 2x longer than high ( Fig. 41 ); apex narrowly rounded in lateral view, deeply incised in dorsal view ( Fig. 42 ). Lateral branch length half the central branch length, pointed, sub­straight ( Fig. 41 ); slightly converging in dorsal view ( Fig. 42 ); proximal setae form continuous band with setae on segment IX. Median branch, lateral view ( Fig. 41 ), large, proceeds lateral branches; with setae on ventral margin; in dorsal view ( Fig. 42 ), sharply pointed, visible between lateral and central branches. Gonocoxite, lateral view ( Fig. 41 ), curving slightly dorsally along its length, apex produced dorsad; dorsal margin sigmoid, ventral margin slightly convex ( Fig. 41 ); slender sub­apical part nearly 0.6x as high as proximal part; in ventral view ( Fig. 43 ), sub­straight, oriented posteriad along its length, apex slightly dilated; covered by setae except on proximal part. Phallus simple; phallobase slightly longer than three­quarts the height of segment IX ( Fig. 44 ); endotheca produced dorsally in dorsal opening starting distally on phallus, without spines; in ventral view ( Fig. 45 ), lateral incisions at proximal part located opposite to margin of anterior phallus opening. Female unknown.