Neosilba distospinosa, 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 : 377-383

Neosilba distospinosa sp. nov.

( Figs. 9 A-F)

Type data: Holotype ♂. COLOMBIA, Tolima, Cajamarca. 04°26’267”N, 75°29’261”O, 2444 m, 03.I.2006, M. R. Castañeda & A. Osorio. Ex Guamo ( Inga edulis Mart ) ( MEN-UT) . Paratypes 3 ♂, Tolima, Cajamarca. 04°26’267”N, 75°29’261”O, 2444 m, 03.I.2005 , Mcphail trap ( MEN-UT) . 1 ♂ 26.I.2005. 1 ♂. 03.I.2006. 1 ♂, 04°26’102”N, 75°29’955”O, 1932 m, 03.XI.2004. 1 ♂, 03.I.2005. 2 ♂, 26.I.2005. 4 ♂, 09.II.2005, 1 ♂, Ibagué , (Juntas). 23.X.2005 , J.C. Cristancho. Mcphail trap ( MEN-UT) .

Etymology: The name of the species is an adjective that means distal spiculae (from Latin disto = distant + spina = spine + suffix osus) in reference to the filament of the aedeagus of this species that is spiculated at apex. Diagnosis: Neosilba distospinosa has 8-10 distal and ventral (4-5 in each side) spine-like spiculae in the filament of the aedeagus ( Fig. 9C ), distal dorsal and lateral side of C-shaped densely spiculated ( Figs. 9 A-B, D-E), C-shaped abruptly reduced at the base of the filament ( Figs. 9D, E ), surstylus with 7 distal prensisetae in right angle at each side ( Fig. 9F ). N. distospinosa belongs to certa subgroup because of the size and shape of the male genitalia, The C-shape is thicker than the filament and this one is long and thin. Species of the glaberrima subgroup ( N. batesi , N. bifida , N. glaberrima , N. delvechioi , N. inesperata and N. pseudobifida ) differs by the spine-like lobe or two projected lobes arising on convex surface of the C-shape and by the shape of the paramere ( Figs. 10-12 ); N. certa ( Fig. 13 ) and N. bella differs by the C-shape is gradually thinner at the base of filament; N. oaxacana ( Fig. 14 ) differs by the prensisetae of the surstylus and by the filament of the aedeagus; the surstylus has two prensisetae located near the medial longitudinal line at each side and the other ones located in a external longitudinal line, and the filament does not have any spicula; N. pradoi differs by the spiculae in the filament of the aedeagus being absent; N. paramerolatus differs by the filament of the aedeagus without spiculae and 9 prensisetae at each side of the surstylus.

Description: Body length 4.8-5.52 mm long, 1.70-2.37 mm wide at pteropleura. Head: 1.6-1.8 mm wide, 1.4-1.5 mm high, 0.6-0.7 mm long; front 0.4-0.5 mm wide in the lunule and 0.51-0.55 mm wide lower ocelar triangle; lunule with 8 setulae; postpedicel 0.7-0.9 mm long, 0.2-0.3 mm wide in lateral view; arista 1.1 mm long; subvibrissal area with 3 setulae. Thorax: 1.5-2.0 mm wide, 1.9-2.6 mm long, anepisternum with 4 anterodorsal and 5-6 posterior bristles; scutellum with 7 setulae between lateral bristles; fringes of calypteres with 8-9 brown setae; wing 5.3-5.7 mm long, 2.0- 2.2 mm wide, hyaline. Abdomen: 1.9-2.22 mm long. Male terminalia: Epandrium 0.55-0.61 mm long, 0.35-0.43 mm wide (1.25-1.41 times as long as broad), with a soft distal cleft; surstylus with 7 prensisetae at each side arranged in right angle; trapezoidshape gonopod with a ventral, spine-like, long and thin setula; paramere finger-like in ventral view, covered with acute spiculae toward its end and with 4-6 setulae; cerca 0.146 mm long, 0.135 mm wide, with a lateral bunch of setulae; aedeagus with distal, thick and acute spiculae, grouped at the end of C and towards the filament; filament 0.015 -0.019 mm wide, 0.96-1.15 mm long, smooth, with 4-5 pairs of spine-like spiculae in the ventro-distal side, apex beyond the surstylus; ejaculatory apodeme rhomboid-shape in ventral view.

Host: specimens were collected from Inga fruits ( Inga edulis Mart ).

Figures

FIGURE 9: Neosilba distospinosa sp. nov., Male genitalia: A. Ventral view; B. Lateral view; C. Apex of the filament of the aedeagus; D. Base of the filament and section C of the aedeagus (lateral view); E. Paramere and gonopodite (ventral view of the epandrium); F. Apex of the epandrium (ventral view) details of the prensisetae.

FIGURE 10: Neosilba batesi (Curran). Male genitalia: A. Ventral view; B. Lateral view; C. Base of the hypandrium (ventral view) details of paramere; D. Ejaculatory apodeme.

FIGURE 11: Neosilba bifida Strikis & Prado. Male genitalia: A. Ventral view; B. Lateral view; C. Apex of the epandrium (ventral view) details of the prensisetae.

FIGURE 12: Neosilba glaberrima (Wiedemann). Male genitalia: A. Ventral view; B. Lateral view; C. Section C and base of the filament of the aedeagus (lateral view). D. Apex of the epandrium (ventral view) details of the prensisetae.

FIGURE 13: Neosilba certa (Walker). Male genitalia: A. Ventral view; B. Lateral view; C. Paramere and gonopodite (ventral view of the hypandrium). D. Section C and base of the filament of the aedeagus (lateral view).

FIGURE 14: Neosilba oaxacana McAlpine & Steyskal, 1982. Male genitalia: A. Ventral view; B. Lateral view; C. Paramere and gonopodite (ventral view of the hypandrium). D. Section C and base of the filament of the aedeagus (lateral view).