Chimarra koualeensis, Johanson, Kjell Arne & Mary, Nathalie, 2009

Johanson, Kjell Arne & Mary, Nathalie, 2009, Description of three new caddisfly species from Mayotte Island, Comoros Archipelago (Insecta: Trichoptera), Zootaxa 2089, pp. 1-9 : 6-7

Chimarra koualeensis , new species

Figs. 9–12

Diagnosis. This species is separable from other Afrotropical Chimarra species by a combination of characters in the genitalia: in the lateral view by possessing anteriorly a strongly produced and tapering sternite IX; presence of a narrow, projecting ventral process at the posterior margin of sternite IX; in dorsal view by the unique shape of segment X; the presence of slender, median processes of inferior appendages directed mesad; and bilobed posterior margins of the inferior appendages. The species resembles C. bertrandi Scott, 1974 , from Zimbabwe; C. callasae Gibon, 1982 , from Mali; and C. sassandrae Gibon, 1982 , from West Africa, from which it is separated by the above characters.

Description. Male genitalia: Sternite IX strongly produced and tapering anterad in lateral view ( Fig. 9 ); anterior margin uniformly concavely rounded; segment narrow and nearly parallel-sided dorsally, with minute dorsal apodeme; posterior margin nearly straight; ventral process present posteriorly on sternite IX ( Figs. 9, 11 ); sternite in ventral view ( Fig. 11 ) with weakly concave anterior and posterior margins; in dorsal view anterior margins shallowly concave ( Fig. 10 ). Segment X forming pair of short, depressed, plate-like processes; in lateral view nearly straight with rounded apices ( Fig. 9 ), each with small, subapical thorn-like process; in dorsal view uniformly curving laterad ( Fig. 10 ); each process with apex pointing laterad, lateral tooth present at midlength ( Fig. 10 ); cleft between processes V-shaped. Preanal appendages directed posterodorsad ( Figs. 9–10 ), short, slightly club-shaped; covered by setae. Inferior appendages nearly rectangular in lateral view, apicodorsal corner slightly produced dorsad into rounded lobe ( Fig. 9 ); posterior margin weakly incised at mid-height; in ventral view ( Fig. 11 ) inferior appendages slightly diverging; each inferior appendage with smooth, cylindrical, median process basally directed posterad before sharply curving mesad, apices exceeding median margins of inferior appendages ( Fig. 11 ). Phallus ( Fig. 12 ) long, slender; dorsal margin uniformly convex; border between phallotheca and endotheca invisible; phallobase shallow, long; single endothecal spine present at left side of apex.

Holotype (male): MAYOTTE: Koualé river, affluent forêt 1 (DAF-19), 12°47’57.84’’S, 45°09’51.77’’E, 201 m, 18.v.2006. Abdomen slide mounted in Euparal, rest of body in alcohol ( MNHN).

Paratypes: Same data as holotype — 2 pupae (in alcohol, NRM).

Distribution. Comoros Archipelago.

Etymology. koualeensis , named after the type locality, Koualé on Mayotte Island.

Figures

FIGURES 9 – 12. Chimarra koualeensis, new species. Male holotype: 9 — genitalia, left lateral; 10 — genitalia, dorsal; 11 — genitalia, ventral; 12 — phallus, left lateral.