Sepedon gracilicornis, Orth, 1986

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 : 56

S. gracilicornis Orth, 1986

( Figs 10, 14, 18 )

Diagnosis. This is the most yellowish-brown species of the group, with a short, drop-like orbital spot; deeply concave face in lateral view; pedicel index about 4.5; hypandrium not produced basally in lateral view ( Fig. 10 ); aedeagus: midprojection absent; distiphallus shorter than epiphallus ( Fig. 14 ); and epiphallus bilobate apically ( Fig. 18 ).

Distribution. The known distribution area extends from Canada (southern Ontario, Quebec) west to Iowa and south to New Jersey in the USA (map: Orth 1986).

Material examined. UNITED STATES: Iowa, Hancock Co., Pilot Knob State Park, 22.v.1970, 1 3 (paratype), C. O.Berg; Massachusetts, Middlesex Co., Lexington, 22.vii.1982, 1 3, W. L. Murphy; Michigan, Wayne Co., Grosse Ile, 1.ix.1951, 1 Ƥ, G. C. Steyskal (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.