Neosilba spiculata, 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 : 374

Neosilba spiculata sp. nov.

( Figs. 7 A-F)

Type data: Holotype ♂. COLOMBIA, Tolima, Cajamarca. 04°26’373”N, 75°29’574”O, 2347 m, 03.I.2006, M. R. Castañeda & A. Osorio. In Guamo ( Inga edulis Mart ) ( MEN-UT).

Etymology: The name of the species is an adjective that means spiculated (from Latin spiculum) in reference to the filament of the aedeagus that is spiculated.

Diagnosis: Neosilba spiculata could be recognized by the constant diameter of the aedeagus, this one with 4 longitudinal lines of spiculae from the base until 4/5 of the ventral surface ( Figs. 7E, F ); apex of the aedeagus strongly S-shaped in lateral view and slightly wider in ventral view. Epandrium 2 or more times longer than wide and parallel-sided. The new species is similar to male terminalia of N. pendula , N. pseudopendula , N. pantanense , N. perezi , N. cornuphallus , N. turgidiphallus and the next new species N. angusta ; the male genitalia of N. spiculata is similar to species of the nigrocaerulea subgroup. N. pendula differs the apex of the filament 2-3 times wider and the parameres are tongue-like shaped in ventral view; N. pseudopendula differs by it having the surstylus with a distal lobe towards the apex and rounded parameres ( Figs. 7I, J ); N. pantanense differs by having the spiculae of the filament of the aedeagus located at the apical third; N. perezi differs by its filament apex being slightly S-like shaped and having a smooth filament of the aedeagus; N. angusta differs by having a narrowed apex of the aedeagus. Species from the nigrocaerulea subgroup differs by its straight filament; N. cornuphallus and N. turgidiphallus differ by the filament of the aedeagus with different widths (i.e., wider at the middle), without spiculae.

Description: Body length 5.40 mm long, 1.62 mm wide at pteropleuras. Head: 1.59 mm wide, 1.25 mm high, 0.7 mm long; fronts 0.38 mm wide in the lunule, 0.43 mm wide lower ocelar triangle; frontal lunule with 10 setulae; postpedicel 0.78 mm long, 0.19 mm wide in lateral view; arista 0.83 mm long, longer setulae of the arista 0.051 mm; subvibrissal area with 5 setulae. Thorax: 1.62 mm wide, 2.0 mm long; anepisternum with 4 anterodorsal and 6 posterior setae; scutellum with 5 setulae between lateral anterior and posterior bristles; scutellum without setulae before basal bristle; fringes of calypteres with 10 brown setae; Wing 5.0 mm long, 1.92 mm wide, hyaline. Abdomen: 2.70 mm long. Male terminalia: 1.23 mm long, 0.28 mm wide; epandrium 0.64 mm long, 0.23 mm wide (2.77 times as long as broad); surstylus without a distal lobe and with 8 prensisetae at each side; proximal half of gonopodites thin and widened in the distal half, gonopodites hairy; parameres with triangular lobes in ventral view; aedeagus with 4 lines of ventral spiculae from base to 0.73 mm (4/5 long); filament 0.83 mm long, 0.128 mm wide, apex of filament strongly S-like shaped in lateral view; cerci 0.192 mm long, 0.135 mm wide.

Host: N. spiculata was collected from Inga fruits ( Inga edulis Mart ).

Figures

FIGURE 7: Male genitalia: A-F. Neosilba spiculata sp. nov.; G-K. N. pseudopendula (Korytkowski & Ojeda). A, B, G. Ventral view (A with the filament broken); C, H. Lateral view; D. Details of the prensisetae (ventral view of the epandrium); E, I. Base of the hypandrium (ventral view), details of the paramere; F. Details of the filament of the aedeagus; J. Details of the lobe of the surstylus.