Sepedon tenuicornis, Cresson, 1920

Elberg, Kaupo, Rozkošný, Rudolf & Knutson, Lloyd, 2009, A review of of the Holarctic Sepedon fuscipennis and S. spinipes groups with description of a new species (Diptera: Sciomyzidae), Zootaxa 2288, pp. 51-60 : 57

S. tenuicornis Cresson, 1920

( Figs 11, 15, 19 )

Diagnosis. A reddish-brown species with a short, drop-like orbital spot; slightly concave face in lateral view; pedicel index about 7.0; hypandrium not produced basally in lateral view ( Fig. 11 ); aedeagus: midprojection absent; distiphallus longer than epiphallus ( Fig. 15 ); epiphallus with a semicircular callus apically ( Fig. 19 ).

Distribution. In a fairly limited area in the USA, east of 100° longitude from New York near the southern shore of Lake Ontario to southeastern Texas (map: Orth 1986).

Material examined. UNITED STATES: New York, Riverhead, May 1951, 1 Ƥ, B. Latham; New York, Orleans Co., Albion, 6.viii.1952, 1 3, 1 Ƥ, G. C. Steyskal; Texas, San Jacinto River, 8 miles W of New Waverly, 18.v.1969, 1 Ƥ, V. V. Board (all USNM).

Figures

FIGURES 8 – 19. Nearctic species of Sepedon fuscipennis group, details of male terminalia. 8, 12, 16. S. floridensis. 9, 13, 17. S. fuscipennis. 10, 14, 18. S. gracilicornis. 11, 15, 19. S. tenuicornis. 8 – 11. Hypandrium in lateral view. 12 – 15. Aedeagus in lateral view. 16 – 19. Epiphallus in caudal view. Scale: 0.3 mm.