Tactusa, Fibiger, 2010

Han, Hui Lin & Kononenko, Vladimir S., 2021, A new species of Tactusa Fibiger, 2010 from Autonomous Region Xizang, China (Lepidoptera, Erebidae, Hypenodinae). Taxonomic study of Micronoctuini. Contribution II, Zootaxa 4933 (2), pp. 295-300 : 299

Key to the species of the genus Tactusa in China based on male genitalia

1. Cucullus is not narrow and sickle-shaped.................................................................. 2

- Cucullus is narrow and sickle-shaped...................................................... T. virga ( Figs 9, 17 )

2. Right cucullus with a sickle-shaped process................................................................ 3

- Right cucullus without a sickle-shaped process............................................................. 4

3. Juxta with semi-circular opening dorsally for position of aedeagus............................. T. flexus ( Figs 10, 18 )

- Juxta with a deep cleft for aedeagus...................................................... T. pars ( Figs 11, 19 )

4. Aedeagus without a prominent dorsal plate................................................................ 5

- Aedeagus with a prominent dorsal plate.............................................. T. motuoensis ( Figs 12, 20 )

5. Juxta not triangle-shaped, without horn in centre............................................................ 6

- Juxta triangle-shaped, with horn in centre................................................... T. topi ( Figs 13, 21 )

6. Cucullus narrow and long, lengthwise extended..................................... T. discrepans ( Figs 14, 15, 22 )

- Cucullus broad, rounded, forming a cross with axis of valva.................................. T. brevis ( Figs 16, 23 )

Figures

FIGURES 9–26. Tactusa spp., adults (9–16), male genitalia (17–23), distribution map and habitats of T. motuoensis (24–26). 9, 17. T. virga (after Fibiger et al., 2011); 10, 14. T. flexus (after Fibiger et al., 2011); 11, 19. T. pars Fibiger, 2010 (after Fibiger, 2010), male genitalia HHL-4032-1; 12, 20. T. motuoensis sp.n. Holotype. China, Xizang, male genitalia HHL-4012-1; 13, 21. T. topi (after Fibiger, 2010); 14, 15, 22. T. discrepans (after Fibiger, 2010); 16, 23 T. brevis (after Fibiger et al., 2011); 24. Distribution map of T. motuoensis; 25, 26. Collecting sites of T. motuoensis in vicinity of Motuo in the northernmost tropical rain forest: 25 - altitude 1121m; 26 - altitude 830m.