Description. Female. Body length: 2.3 mm. Fore wing length: 2.2 mm. Flagellomere 2 length/width: 0.11 mm/0.05 mm. Flagellomere 14 length/width: 0.08 mm/0.06 mm. Oculo-ocellar distance: 0.14 mm. Distance between posterior ocelli: 0.08 mm. Diameter of posterior ocellus: 0.05 mm. Metafemur length/width: 0.52 mm/0.20 mm. Metatibia length: 0.62 mm. Mediotergite 1 length/maximum width/minimum width: 0.30/0.15/0.08 mm. Mediotergite 2 length/width at posterior margin: 0.13/0.08 mm. Male: As female, but metafemur thinner and antenna longer. Diagnosis. The mediotergite 1 is relatively long and with a slight constriction near anterior end. That character is also shared with other three species of Venanus. However, V. johnnyrosalesi can be separated from V. helavai by its much smaller size (2.3 mm vs 2.8–3.0 mm) and less sculptured propodeum, from V. yanayacuensis by its wider discal cell in fore wing (1.0 × vs 1.2 × as wide as high), metasoma color (brown vs black) and fore wing vein 2RS significanly longer than vein r (shorter than r in yanayacuensis), and from V. randallgarciai by proportion of veins 2RS and r (1.4 × vs 2.0 ×), sculpture of metapleuron and mediotergite 2, and less narrow mediotergite 1 (narrowest width 0.8 × width at posterior margin vs 0.6 × in randallgarciai).
Description. Female. Body length: 2.3 mm. Fore wing length: 2.2 mm. Flagellomere 2 length/width: 0.11 mm/0.05 mm. Flagellomere 14 length/width: 0.08 mm/0.06 mm. Oculo-ocellar distance: 0.14 mm. Distance between posterior ocelli: 0.08 mm. Diameter of posterior ocellus: 0.05 mm. Metafemur length/width: 0.52 mm/0.20 mm. Metatibia length: 0.62 mm. Mediotergite 1 length/maximum width/minimum width: 0.30/0.15/0.08 mm. Mediotergite 2 length/width at posterior margin: 0.13/0.08 mm. Male: As female, but metafemur thinner and antenna longer. Diagnosis. The mediotergite 1 is relatively long and with a slight constriction near anterior end. That character is also shared with other three species of Venanus. However, V. johnnyrosalesi can be separated from V. helavai by its much smaller size (2.3 mm vs 2.8–3.0 mm) and less sculptured propodeum, from V. yanayacuensis by its wider discal cell in fore wing (1.0 × vs 1.2 × as wide as high), metasoma color (brown vs black) and fore wing vein 2RS significanly longer than vein r (shorter than r in yanayacuensis), and from V. randallgarciai by proportion of veins 2RS and r (1.4 × vs 2.0 ×), sculpture of metapleuron and mediotergite 2, and less narrow mediotergite 1 (narrowest width 0.8 × width at posterior margin vs 0.6 × in randallgarciai).
Only know from Volcán Cacao, ACG, Costa Rica.
Only know from Volcán Cacao, ACG, Costa Rica.