Thecomyia longicornis Perty, 1833

Mortelmans, Jonas & Pollet, Marc, 2018, New data and species of Thecomyia Perty, 1833 (Diptera: Sciomyzidae) from Mitaraka (French Guiana), with notes on the genus, Zoosystema 40 (17), pp. 415-423 : 420-422

Thecomyia longicornis Perty, 1833

Thecomyia longicornis Perty, 1833: 189 (designated as type species; type locality: “ Amazon ”, Brazil). — Rondani 1868: 79-80, (redescription). — Hendel 1932: 98 (suggested synonym with Thecomyia limbata ). — Curran 1934: 458 (distribution). — Abercrombie & Berg 1975 (revalidation of name). — Knutson et al. 1976: 13 (Neotropical catalog). — Knutson & Carvalho 1989 (seasonal distribution). — Marinoni & Mathis 2000: 209 (cladistic analysis). — Marinoni et al. 2003: 14 (generic revision).

MATERIAL EXAMINED. — French Guiana. 1 ♂, Mitaraka , site MIT- DZ-RBF2, 02°13’59.3”N, 54°27’00.3”W, 283 m, tropical wet forest (bas fond), 28.II-5.III.2015, yellow pan traps, MP leg., sample code: MITARAKA/176 (abdomen removed, dissected, stored in microvial containing glycerine on same pin as specimen), MNHN, pinned specimen with accession number MNHN-ED-ED10598. 1 ♂, Mitaraka, site MIT-D-RBF, 02°13’58.8”N, 54°27’07.5”W, 317 m, on vegetation along muddy trail and in swamp, 6.III.2015, sweep net, MP leg., sample code: MITARAKA/075, deposited as an intact, dry, pinned specimen, coll. JM. 1♀, Mitaraka, site MIT-DZ-RBF2, 02°13’59.3”N, 54°27’00.3”W, 283 m, tropical wet forest (bas fond), 28.II-5.III.2015 ,

yellow pan traps, MP leg., sample code: MITARAKA/176, MNHN, pinned specimen with accession number MNHN-ED-ED10599.

REMARK

This is the first record of T. longicornis from French Guiana. KEY TO THECOMYIA PERTY, 1833

The new Thecomyia species is described on the basis of males only. Male Thecomyia can be identified by use of the key to species by Marinoni et al. (2003). To include T. diederiki Mortelmans n. sp., couplet 10 should be adjusted as follows:

10. Distiphallus with acrophallus strongly coiled ( Marinoni et al. 2003: fig. 7), acrophallus with one or two pro-cesses ........................................................................................................................................................ 10’ — Distiphallus with acrophallus not strongly coiled, projecting ventrally, acrophallus with three processes .... 11

10’. Posterior surstylus rounded; acrophallus with one strongly coiled process ............... T. lateralis ( Walker, 1858)

— Posterior surstylus bifid with apex acute, acrophallus with two strongly coiled, similar processes .................... ........................................................................................................................ T. diederiki Mortelmans n. sp.