Rhotanella thyrsis, Fennah, 1970

Zelazny, B. & Webb, M. D., 2011, 3071, Zootaxa 3071, pp. 1-307 : 115

Key to the species of the Rhotanella thyrsis species group (males)

1. Forewings with first costal cell containing a broad bright red area, filling almost half the first costal cell ( Fig. 257f)............ 2

- Forewings without such a broad, bright red area in first costal cell; however, a red stripe might line the costal margin ( Fig. 256f).. 3

2. Forewings with veins in basal half covered by numerous light dots ( Fig. 257f)..................... R. sophiae sp. nov., p. 116

- Forewings without light dots on basal veins ( Fig. 258f).......................................... R. thyrsis Fennah , p. 117

3. Forewings with a red stripe along base of costal margin ( Fig. 256f).............................. R. cyclops sp. nov., p. 115

- Forewings without a red stripe a the base of the costal margin..................................... R. lucida (Muir) , p. 116