Neosilba concava, Galeano-Olaya & Canal, 2012

Galeano-Olaya, Pedro E. & Canal, Nelson A., 2012, New Species Of Neosilba Mcalpine (Diptera: Lonchaeidae) And New Records From Colombia, Papéis Avulsos de Zoologia 52 (31), pp. 361-385 : 371-372

Neosilba concava sp. nov.

( Figs. 5 A-F)

Type data: Holotype ♂. COLOMBIA, Tolima, Espinal. 04°11’33.695”N, 74°57’47.200”O, 332 m, 09.XII.2001, N.A. Canal & P. Galeano. In McPhail trap ( MEN-UT). Paratipe 1 ♂ same data ( MEN-UT).

Etymology: The name of this species is an adjective that means concave (from Latin concavus) in reference to the posterodorsal border of the epandrium.

Diagnosis: Neosislba concava belongs to the peltae species group characterized according to data of the previous species. The new species could be recognized because the junction of the filament and the C of the aedeagus is not clearly wider ( Fig. 5D ), filament spiculated just at the apex and base ( Fig. 5D ), by the 17 setulae along ¾ apical in the margin of the surstylus, in three groups 6 distally, 5 spaced medial and 6 posterior ( Figs. 5A, B, E ), and the posterodorsal border of the epandrium concave ( Figs. 5B, E ); N. convexa differs by the posterodorsal border of the epandrium rounded; by the 10 equal spaced setulae in the margin of the surstylus and the filament slightly thinner; N. peltae differs by the posterodorsal border of the epandrium being rectangular, 7 setulae in the margin of the surstylus preceded by 4 widely spaced; the filament of the aedeagus is totally spiculated; N. mcalpiniei differs by the apex of the aedeagus being arrow-like shaped; N. parapeltae by the apex of the aedeagus crown-like shaped; N. ilehuense differs by the filament reaching beyond the base of the surstylus.

Description: Body length 4.52 mm long, 1.55 mm wide at pteropleura. Head: 1.66 mm wide, 1.40 mm high, 0.67 mm long; front 0.49 mm wide at lunule, 0.49 mm wide lower ocelar triangle; lunule with 8 setulae; postpedicel 0.70 mm long, 0.19 mm wide in lateral view; arista 0.77 mm long, longest setulae of the arista 0.064 mm long; subvibrissal area with less than 20 setulae. Thorax: 1.85 mm long, 1.55 mm wide at pteropleura; anepisternum with 4 anterodorsal and 5 posterior bristles; fringes of calypteres with 8 brown setae; Wing 4.55 mm long, 1.85 mm wide, hyaline. Abdomen: 2.00 mm long. Male terminalia: 1.21 mm long, 0.15 mm wide in ventral view; epandrium 0.60 mm long, 0.15 mm wide in lateral view (4 times as long as broad), without posteroventral lobe and posterodorsal border concave; surstylus margined with 20, in 2/3 apical, equal spaced setulae in ventral view and 7 prensisetae at each side in a nearly linear row; transverse gonopodite, thinner in the ventral apex, lobule of the paramere cylindrical-shaped, truncated; aedeagus short, filament 0.15 mm long, 0.023 mm wide, slightly broad at the base in ventral view and does not reach the base of the surstylus, spiculated at apex and base (the C spiculated in its junction with the filament too) longer than section C; cerci 0.206 mm long, 0.185 mm wide in ventral view, 0.123 mm wide in lateral view.

Host: unknown.

Figures

FIGURE 5: Neosilba concava sp. nov. Male genitalia: A. Ventral view; B. Lateral view; C. Base of the epandrium (ventral view), filament of the aedeagus, paramere and gonopodite; D. Filament and section C of the aedeagus (lateral view); E. Apex of the epandrium (latral view); F. Apex of the epandrium (ventral view), details of the prensisetae.