Key to the species of Litoblatta from Argentina based on males

1 Right paraproct with an extension “digital process” (Fig. 36).......................................... L. argentina

- Right paraproct without such extension.................................................................... 2

2. Styli located at right angles; the right is transversal and the left is parallel to the body longitudinal axis (Figs. 16–17, 57–58). ................................................................................................... 3

- Styli parallel......................................................................................... 4

3. Both stylus with spines (Fig. 17)........................................................ L. misionerae sp. nov.

- Spines present only on the right stylus (short).......................................................... L. clara

4. Short conic spines on the internal basal margin of the right paraproct (Figs. 22–23)................ L. tucumanae sp. nov.

- Long spines on the internal basal margin of the right paraproct (Figs 1–2, 10, 27, 30)................................ 5

5. Spines distributed along the internal lateral margin of the paraproct (Fig. 10)......................... L. elisae sp. nov.

- Spines grouped on the internal lateral margin of the right paraproct.............................................. 6

6. Triangular right stylus (Figs 4–5, 7). Right paraproct with a cone formed by a group of spines with adjacent bases and convergent apices (Figs. 1–2)......................................................................... L. lutea sp. nov.

- Right stylus with rounded apex. Right paraproct with a group of long spines, apically divergent (Figs. 27, 30)...................................................................................................... L. brasiliensis