Phthinia

Oliveira, Sarah Siqueira & Amorim, Dalton De Souza, 2010, The genus Phthinia Winnertz (Diptera, Mycetophilidae) in the Neotropical region, with the first records from Brazil, Zootaxa 2350, pp. 22-34 : 32

Key for the Neotropical species of Phthinia (modified from Freeman 1951)

1 Wing membrane with macrotrichia covering the entire surface, but microtrichia only close to the veins ( Chile). Gonostyle with one basal and two apical projections.................................................................... P. fasciata Freeman

- Wing membrane with both, macro and microtrichia covering the entire surface. Gonostyle not as above ................ 2

2(1) Sc reaching C close to the origin of Rs; M1+2 as long as or longer than r-m; gonocoxite without distal projections beyond apex of gonostyle ( Figs. 3, 4 , 7 , 8 ) .................................................................................................................. 3

- Sc reaching C before anterior end of r-m; M1+2 shorter than r-m; gonocoxite distal projections extending much beyond apex of gonostyle ( Figs. 1, 2 , 5 , 6 )................................................................................................................... 6

3(2) M1+2 longer than r-m ( Fig. 4 ) ....................................................................................................................................... 4

- M1+2 as long as r-m ( Fig. 3 ) .......................................................................................................................................... 5

4(3) Gonocoxite with two distal digitiform projections, one dorsal and one ventral to the gonostyle ( Chile) ( Fig. 8 )......... ..................................................................................................................................................... P. p a r a f u rc a t a, sp.n.

- Gonocoxite with a single distal projection, ventral to the gonostyle ( Chile) ................................. P. f u rc a t a Freeman

5(3) No distal extension of the gonocoxite; gonostyle flagellum-like (southern Argentina) ............. P. flagellata Freeman

- Gonocoxite with a distal extension; gonostyle wide at base, slender to apex ( Chile) ( Fig. 7 ) ......... P. freemani , sp.n.

6(2) Gonostyle with a single distal tooth-like, well sclerotized projection ( Brazil, State of Espírito Santo) ( Fig. 5 ) .......... ............................................................................................................................................................ P. theresae , sp.n.

- Gonostyle with a pair of flattened extensions, one of them rather translucent, the other well sclerotized ( Brazil, State of Santa Catarina) ( Fig. 6 )..................................................................................................................... P. urubici , sp.n.

Figures

FIGURE 5. Male terminalia of Phthinia theresae, sp. n., dorsolateral view. Holotype. Abbreviations: Ae, aedeagus; Ce, cercus; Gc, gonocoxite; Gs, gonostylus; T 9, tergite 9; Tg, tegmen.

FIGURE 6. Male terminalia of Phthinia urubici, sp. n., dorsolateral view. Paratype. Abbreviations: Ae, aedeagus; Ce, cercus; Gc, gonocoxite; Gs, gonostylus; S 10, sternite 10; T 9, tergite 9; Tg, tegmen.

FIGURE 7. Male terminalia of Phthinia freemani, sp. n., dorsal view. Paratype. Abbreviations: Ce, cercus; Gc, gonocoxite; Gs, gonostylus; S 10, sternite 10; T 9, tergite 9; Tg, tegmen.

FIGURE 8. Male terminalia of Phthinia parafurcata, sp. n., dorsal view. Paratype. Abbreviations: Ce, cercus; dGcdp, dorsal gonocoxite distal projection; Gc, gonocoxite; Gs, gonostylus; T 9, tergite 9; Tg, tegmen; vGcdp, ventral gonocoxite distal projection.

FIGURES 1 – 4. Wings of Phthinia. 1. P. t h ere s a e, sp. n. Holotype. 2. P. urubici, sp. n. Paratype. 3. P. freemani, sp. n. Paratype. 4. P. parafurcata, sp. n. Paratype. Scale: 0.5 mm.