Thecomyia naponica Marinoni and Steyskal

Marinoni, Luciane, Steyskal, George C. & Knutson, Lloyd, 2003, Revision and cladistic analysis of the Neotropical Genus Thecomyia Perty (Diptera: Sciomyzidae), Zootaxa 191, pp. 1-36 : 24-25

9. Thecomyia naponica Marinoni and Steyskal , new species ( Figs. 14 , 26 , 38, 41, 43)

Description. Adult. Upper orbital seta absent. Fronto­orbital spot rounded, width approximately 1/4 of frontal width. Rostrum 0.73 in males and 0.70­0.72 in females as high as eye. White microtomentose infra­ocular marking forming irregular triangle with margin between gena and postgena indented, not reaching oral margin. Mid femur without anteromedial seta. Mid and hind femora wholly yellowish. Mesonotum with medial tripartite stripe evanescent anteriorly, yellow only for short distance before scutellum; scutellum golden yellow. Ejaculatory apodeme broad, apex rounded ( Fig. 14 ). Phallapodeme almost straight ( Fig. 26 ). Anterior basiphallic process with 2 pointed processes. Epiphallus large, extending to base of distiphallus. Distiphallus long, flattened. Hypandrium in lateral view with dorsal margin concave, anteroventral margin very broad, almost straight. Anteroventral hypandrial plates in frontal view broad. Membranous projections of margins of anteroventral hypandrial plates extending to lateral margins of hypandrium, covered with minute hairs ( Fig. 26 ). Posterior and anterior surstyli distinct, anterior one very slender, pointed; posterior one with anterior and posterior margins almost convex ( Fig. 14 ). Female sternites 6, 7 and 8 almost fused, suture between 6 and 7+8 visible; wider than long, narrow, anterior margin of sternite 6 sinuate. Spermathecal duct with sclerotized region joining spermatheca long, tapered apically, without apical, digitiform projection (Fig. 38).

Type specimens. HOLOTYPE MALE. 1. White rectangular label: [ ECUADOR] " Ecuador, Coca, Napo, Napo River, 250 m., 25­30 Jun 1965, L. Peña col." ( CNC). PARATYPES. Same label as on the holotype, 6 m. and 3 f. ( CNC); 3 m. and 2 f. ( USNM); 3 m. and 2 f. ( DZUP).

Etymology. The specific epithet, naponica , is a reference to the species type­locality, Napo River (Rio Napo).

Figures

FIGURES 12 ­ 14. Male terminalia, left lateral view: 12, Thecomyia chrysacra Marinoni and Steyskal; 13, T. mathisi Marinoni; 14, T. naponica Marinoni and Steyskal.

FIGURES 24 ­ 29. Hypandrium, frontal view and right lateral view: 24, Thecomyia chrysacra Marinoni and Steyskal; 25, T. mathisi Marinoni; 26, T. naponica Marinoni and Steyskal; 27, T. papaveroi Marinoni and Steyskal; 28, T. signorelli Marinoni and Steyskal; 29, T. tricuneata Marinoni and Steyskal.