Leptotarsus (Longurio) styx (Alexander, 1954)
Alexander, 1954b: 31–32 (original description); 45, figures 1 (wing) and 3 (male terminalia); (as Longurio). Type locality: Brazil, São Paulo, Salesópolis, Estação Biológica de Boracéia.
Holotype male with labels: (1) handwritten on white paper: “ Brazil | Boracéa | Feb. 10 - 50 [February 10, 1950] | Rabello & | Travassos |”; (2) printed with handwritten inscriptions on red paper: “ HOLOTYPE ♂ | Longurio | styx | C. P. Alexander”.
Preservation: mounted at the tip of a pinned paper triangle. Missing parts: right antenna, right wing, most legs except left front leg, left hind leg and one undetermined leg glued on the paper triangle and terminalia.