Neosilba pantanense
N pantanense belongs to the same complex as N oxacana McAlpine & Steyskal, It is easily separated from this speciesby the spicules on the phallus and the pattern of prensisetae
Description: Holotype: Male. Head rounded; frons narrows slightly toward lunule; 6 interfrontal setae right above plus 5 smaller setae at each side above lunule, other setae small and sparse. Superior orbital bristles smaller than m other species of genus. Ocellar triangle with 2 prominent bristles and 9 setulae, outer verticals smaller than inner verticals Lunule with 12 setulae, 6 at each side, antenna usual to genus, arista long and pubescent 1 cluster of 4 setulae close to oral margin and another cluster of 4 setae at the base of frontal suture close to oial margin Thorax Prostemum bare Katepistemum with 2 prominent bristles and a cluster of 4 superior median setae longer than others. Episternum with 1 stout bristle, epimeron with 1 prominent seta Anepisternum with a row of 5 aligned prominent equally spaced posterior bristles and 5 anteriorsupenoi prominent aligned and equally spaced bristles. Scutellum with 2 prominent apicalmarginal
bristles and ateriorlateral prominent bristles, 6 marginal setae at each side and 2 apicalmarginal setae between apical-marginal bristles. Wings hyaline with brownish venation, calypteres white with white fringes and a cluster of 10 to 12 brown setulae at fold Abdomen usual to genus without any chaetotaxy
distinction.Male terminalia: Aedeagus uniform in diameter after the "C" shaped base; apex a little larger, the last third of aedeagus with small spicules until reaching the prensisetae; aedeagus reaches the middle of cerci . Paramere wedge shaped, with fine hairs in interior margin close to aedeagus Gonopods with fine hairs. Surstylus with fine long setae m anterior margin reaching paramere setae of posterior margin of surstylus short and thick . A cluster of 3 prensisetae at each side of surstylus in the posterior apical margin and 5 other prensisetae aligned, at each side of surstylus almost parallel to aedeagus.. Posterior lobe of epandrium with long setae covering surstylus .
Reared from fruits of Psittachantus acinarius, Phyalis angulata and Allagoptera leucocalyx,