Tonnoira spina Chagas-Vieira

Chagas-Vieira, Cínthia, 2012, New records of Tonnoira Enderlein (Diptera, Psychodidae, Psychodinae) from the Brazilian Amazon with descriptions of two new species, Zootaxa 3318, pp. 51-56 : 53

Tonnoira spina Chagas-Vieira sp. nov.

( Figs. 8–13 )

HOLOTYPE 3. BRASIL, Amazonas, Ipixuna, Rio Gregrório com Lago Grande, 07°10’11.7’’ S 70°49’10.3’’ W, 18–20.v.2011, Malaise [trap], J.A. Rafael, J.T. Câmara, F. Silva, A. Somavilla, C. Gonçalves leg. ( INPA).

Etymology. From Latin spina , meaning “spine”, in reference to the tip of the dorsal paramere.

Diagnosis. Eyes separated by 1 facet diameter; eye bridge with 4 facet rows; interocular suture inverted Y shaped; flagellomeres cylindrical; first flagellomere 1.3X length of second; base of R2+3 not attached to R4; hypandrium narrow; gonostyli with divergent apex; cercus with 3 tenacula; aedeagus bipartite; paramere lying close to the hypandrium.

Description. Head ( Fig. 8 ): eyes separated by 1 facet diameter; eye bridge with 4 facet rows; interocular suture as inverted Y shaped, stem as long as branches. Antenna ( Fig. 9 ): scape cylindrical; pedicel spherical; flagellomeres elongate, cylindrical; first flagellomere 1.3X length of second; ascoids not visible. Proportion of palp segments = 1.0:1.8:1.9:2 ( Fig. 10 ). Wing ( Fig. 11 ) light brown; Sc short; base of R2+3 not attached to R4; radial fork basal to medial fork; medial fork complete; R5 ending at wing apex. Male terminalia: hypandrium a distinct band connecting gonocoxites, narrow and archlike; gonocoxite 0.9X length of the gonostylus with long setae along inner margin ( Fig. 12 ); gonostyli with apices curved laterally, pointed ( Fig. 12 ); aedeagus bipartite ( Fig. 12 ); paramere lying close to the hypandrium ( Fig. 12 ); gonocoxal apodeme fused at midline and articulated with the ejaculatory apodeme ( Fig. 12 ). Epandrium subrectangular with one oval foramen near anterior margin; cercus 1.1X length of epandrium, slightly curved, with 3 tenacula ( Fig. 13 ); tergite 10 with posterior margin rounded ( Fig. 13 ).

Female. Unknown.

Remarks. Tonnoira spina sp. n. appears to be closely related to T. mirabilis based on eyes separated by 1 facet diameter, eye bridge with 4 facet rows, flagellomeres elongate, cylindrical, aedeagus bipartite, epandrium wider than long and cercus with 3 tenacula, but T. spina has interocular suture inverted Y-shaped; dorsal margin of cercus without projections and tergite 10 with posterior margin rounded. T. mirabilis has interocular suture without median spur; dorsal margin of cercus with 3 short projections and 3–4 bristles near base and tergite 10 subtriangular. Moreover, the aedeagus of T. spina is longer and thinner than the aedeagus of T. mirabilis .

Figures

FIGURES 8 – 13. Tonnoira spina sp. nov., holotype 3: 8. Head; 9. Antenna: scape, pedicel and basal flagellomeres; 10. Palpus; 11. Wing; 12. Male terminalia, dorsal view; 13. Male terminalia, ventral view.