Tethlimmena gahani Gounelle, 1911: 168; Aurivillius, 1912: 287 (cat.); Blackwelder, 1946: 578 (checklist); Monné, 1993: 57 (cat.); Monné & Giesbert, 1994: 100 (checklist).
Oxycoleus gahani; Júlio, 1997: 5; Martins & Galileo, 2003: 62; Monné, 2005: 427 (cat.); 2021: 622 (cat.).
Remarks. As seen above, one of the features pointed out by Júlio (1997) to separate T. gahani from T. tristis was the color of the prothorax. However, this feature is variable intraspecifically at least in some species of Oxycoleus. Therefore, this variation is expected to also occurs in Wappesia. It is probable that Melzer (1933) was correct: Tethlimmena tristis being just a chromatic variation of Tethlimmena gahani. See remarks on W. tristis. The male illustrated by Júlio (1997) has the antennae distinctly longer than in the holotype male of Merionoeda (Merionoeda) latipennis, and also than in the male of W. tristis (Fig. 3). This may reinforce that Oxycoleus gahani sensu Júlio (1997) belongs to a different species.