Key for identification of species of Mitogoniella (modified from DaSilva & Gnaspini, 2010)

1 Ocularium with a single medial spine........................................................... M. unicornis

- Ocularium with a pair of free tubercles or fused bases (at least free apex)......................................... 2

2 Dorsal scute entirely punctuate with white dry–mark around granules yellowish........................ M. indistincta

- White dry-mark on dorsal scute following the grooves of areas (punctuate only on lateral margins).................... 3

3 Space between tubercles of ocularium smaller than height of eyes; tubercles of ocularium weak, low or high..... M. taquara

- Space between tubercles of eye-mound much larger than height of eyes; tubercles of ocularium small or large, with fused bases and free apexes divergent or similar to a single tubercle with bifurcated apex...................................... 4

4. Ocularium with weak and divergent tubercles; dry–mark between spines of area III as a pair of paramedian stripes and a thin stripe on longitudinal groove.................................................................... M. modesta

- Ocularium with strong and rounded tubercles, with widely fused bases, which can be similar to a single strong tubercle with bifurcated apex; dry-mark between spines of area III as a wide median rounded stripe and one pair of thin paramedian stripes...................................................................................... M. mucur i sp. nov.