Neotropical osmylids (Neuroptera, Osmylidae): Three new species of Isostenosmylus Krüger, 1913, new distributional records, redescriptions, checklist and key for the Neotropical species Author Martins, Caleb Califre Author Ardila-Camacho, Adrian Author Aspöck, Ulrike text Zootaxa 2016 4149 1 1 66 journal article 10.11646/zootaxa.4149.1.1 a4408b5b-0ea4-4d35-a7de-8f9694fa6e9e 1175-5326 256806 3C009047-18B7-4C79-9C22-6D7659AA533B Isostenosmylus nigrifrons Kimmins, 1940 ( Figs. 22 , 23 ) Isostenosmylus nigrifrons Kimmins, 1940 : 185 , fig. 18, plate IV.2 (male terminalia and genitalia, wings). Refs. Kimmins (1940) , Penny (1977) , Ardila-Camacho & Noriega (2014) . Holotype male, BMNH. Type-locality. Ecuador : Loja , intaj. Material examined. Holotype , Ecuador : Loja , intaj, ( 1♂ BMNH ) . Distribution ( Fig. 43 ). Ecuador (Imbaruba). FIGURE 22. Holotype of Isostenosmylus nigrifrons Kimmins, 1940 , male. A) Habitus dorsal; B) Wings; C) Labels. Photos provided by Benjamin Price (Natural History Museum (BMNH), London, England, United Kingdom). FIGURE 23. Holotype of Isostenosmylus nigrifrons Kimmins, 1940 , male. A–B) Terminalia, lateral view; C–D) gcx IX + gph IX, lateral view; E–F) Complex of gcx X, lateral view. ect (ectoproct), gcx IX (ninth gonocoxite), gph IX (ninth gonapophysis), hyi (hypandrium internum), S VII (seventh sternite), S VIII (eighth sternite), S IX (ninth sternite), T VIII (eighth tergite), T IX (ninth sternite). Photos provided by Benjamin Price (Natural History Museum (BMNH), London, England, United Kingdom). Principal characteristics. Head fulvous; frons with a black transverse band between eyes, such band posterioly extended between the eye and tentorial pit; genae and palpi black; antennae pale yellow with scape and pedicel brownish. Prothorax blackish with a yellowish median band, twice as long as broad; meso- and metanota yellow with black marks. Wings with membrane hyaline and veins alternating brown and pale yellow, pterostigma well-marked ( Fig. 22 B); forewing with many dark brown spots mainly in wing margin and radial trace; hindwing veins mainly pale yellow, with some pale brown spots in costal field, posterior wing margin at the distal half with apices of longitudinal veins and gradate crossveins brown. Legs yellowish with small brown spots. Male ( Fig. 23 ). Ninth sternite in lateral view produced posteroventrally; ninth tergite with posterior margin in lateral view obliquely truncated, dorsal and ventral corners produced. Ectoproct in lateral view subrectangular, posterior edge obliquely truncated, dorsal and ventral corners with blunt lobes. Ninth gonocoxites (tenth sternite of Kimmins 1940 ) with medial lobe flattened and produced in lateral view, posteromedially straight in ventral view; ninth gonapophysis widened, subtrapezoidal in lateral view, attached to ninth gonocoxite by short and thick stems; complex of tenth gonocoxites (paramere of Kimmins 1 940) with upper region curved, pointed at apex, medial branches short and slightly acuminate, ventral region with branches broadened with blunt apices.