Key to species of the M. anomala species-group

[Males only, adapted from Wolff et al. (2014).]

1 T5 about twice as long as T4 (Fig. 496); fore femur brown; ac usually 0:1, rarely 0:0; epandrium with an anteroventral extension (Fig. 99); epiphallus long, slender and sharply curved backward (Fig. 189); [known from Venezuela; Bonatto (2001) also listed it from Ecuador; Marinho et al. (2017) also listed it from Bolivia]...................................... M. anomala

- T5 about 1.5x as long T4; fore femur orange with dark apices dorsally; ac 0:0; epandrium without an anteroventral extension (Wolff et al. 2014: fig. 22); epiphallus short, with only a slight curve (Wolff et al. 2014: fig. 20); [known only from Colombia]......................................................................................... M. andina