1 Anal tube with basiventral processes shorter than or equal to half basal height of pygofer (Fig. 4, Marques-Costa & Cavichioli 2008)............................................................................................... 2
- Anal tube with basiventral processes longer than half basal height of pygofer (Fig. 14 Marques-Costa & Cavichioli 2008)... 3
2 Pygofer, in lateral view, with apical half strongly narrowed and prolonged (Fig. 4, Marques-Costa & Cavichioli 2008); connective H-shaped (Fig. 7, Marques-Costa & Cavichioli 2008); aedeagus with preatrium as long as shaft, shaft with preapical pair of small lateral lamellae (Figs 8, 9, Marques-Costa & Cavichioli 2008) (Brazil)........................................................................................................ T. prolata (Chiamolera & Cavichioli 2004)
- Pygofer, in lateral view, with apical half slightly narrowed towards apex (Fig. 5, Gonçalves et al. 2011); connective Y-shaped (Fig. 8, Gonçalves et al. 2011); aedeagus with preatrium shorter than shaft, shaft with a preapical pair of dorsal spiniform processes (Figs 9, 10, Gonçalves et al. 2011) (Brazil)........... T. curvipenis (Gonçalves, Marques-Costa & Ale-Rocha 2011)
3 Subgenital plates slightly narrowed towards apex (Fig. 6); aedeagus shaft without spines or lamellae (Figs 10, 11) (Peru)...................................................................................... T. pachamama sp. nov.
- Subgenital plates strongly narrowed at the apical two-thirds (Fig. 16, Marques-Costa & Cavichioli 2008); aedeagus shaft with spines or lamellae (Figs 19 ─ 21, Marques-Costa & Cavichioli 2008)............................................. 4
4 Subgenial plates with apices acute and oblique (Fig. 16, Marques-Costa & Cavichioli 2008); connective V-shaped (Fig. 18, Marques-Costa & Cavichioli 2008); aedeagus with two pairs of small spines on shaft, one lateral preapical and one ventroapical (Figs 19 ─ 21, Marques-Costa & Cavichioli 2008); anal tube with basiventral processes straight and oriented (Fig. 14, Marques-Costa & Cavichioli 2008) (Peru)............................ T. admirabilis Marques-Costa & Cavichioli 2008
- Subgenital plates with apices rounded (Fig. 17); connective Y-shaped (Fig. 19); aedeagus with two pairs of lamellae on shaft, one lateroventral and one laterodorsal preapical (Figs 21, 22); anal tube with basiventral processes strongly curved posteriorly (Fig. 16) (Peru)....................................................................... T. viracocha sp. nov.