Thecomyia abercrombiei 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 : 20-21

4. Thecomyia abercrombiei Marinoni and Steyskal , new species ( Figs. 9 , 21 , 33, 41, 44)

Description. Adult. Upper orbital seta absent. Fronto­orbital spot rounded, width approximately 1/3 frontal width. Rostrum 0.75 in males as high as eye. White, microtomentose infra­ocular marking forming a triangle with margin between gena and postgena emarginate. Mid femur without anteromedial seta. Mid and hind femora wholly yellowish. Mesonotum with medial gray, tripartite stripe. Ejaculatory apodeme wide apically, anterior and posterior margins slightly concave ( Fig. 9 ). Phallapodeme almost straight. Anterior basiphallic process concave with tricuspid margin on left side. Epiphallus large, well developed, extending to base of distiphallus. Distiphallus with 4 processes, 3 slender and pointed and 1 wide, larger. Hypandrium in lateral view with dorsal margin slightly concave and anteroventral margin narrow not rounded ( Fig. 21 ). Anteroventral hypandrial plates in frontal view narrow, tapered laterally. Membranous projections of margins of anteroventral hypandrial plates not extending to lateral margins of hypandrium; covered with minute hairs ( Fig. 21 ). Anterior surstylus absent, posterior barlike (Fig, 9). Female sternites 6, 7 and 8 almost fused, longer than wide; presence of sternite 6 indicated by a line of hairs, anterior margin of sternite 6 slightly sinuate; mid longitudinal portion less sclerotized. Spermathecal duct with sclerotized region joining spermatheca long; with apical, digitiform projection (Fig. 33).

Type specimens.­ HOLOTYPE MALE. 1. White rectangular label: "Brit. Guiana, 1908. K.S. Wise. B.M. 1908­207"; 2. Small label hand written: "B. M." ( BMNH). PARATYPE FEMALE. 1. White rectangular label: " GUYANA: Mazaruni ­ Potaro Dictrict, Takutu Mountais 6O 15' N; 59O 5' W, 6 December 1983 "; 2. Small label: "Malaise trap near stream in montana rainforest"; 3. Small label: "EARTHWATCH Research Expedition: W. E. Steiner & P. J. Spangler collectors" ( USNM).

Other specimens examined.­ PERU. Avispas, Madre de Dios, 400 m., 1­15. October 1962, L. Peña col., 1 m. ( CNC).

Etymology. The species epithet, abercrombiei , is a Latin genitive patronym to recognize and honor the numerous contributions of Dr. Jay Abercrombie to the study of Sciomyzidae and to our knowledge of the biology of Thecomyia .

Figures

FIGURES 9 ­ 11. Male terminalia, left lateral view: 9, Thecomyia abercrombiei Marinoni and Steyskal; 10, T. autazensis Marinoni and Styeskal; 11, T. bonattoi Marinoni and Steyskal.

FIGURES 18 ­ 23. Hypandrium, frontal view and right lateral view: 18, Thecomyia longicornis Perty; 19, T. lateralis (Walker); 20, T. limbata (Wiedemann); 21, T. abercrombiei Marinoni and Steyskal; 22, T. autazensis Marinoni and Steyskal; 23, T. bonattoi Marinoni and Steyskal. A, anterior; as, archlike struts; avp, anteroventral plates; d, dorsal; mp, membranous projection; v, ventral.