A Dichotomous Key to Species of Rossmoneura

1. Pygofer dorsal appendage straight in lateral view.

R. carbonata McAtee

1'. Pygofer dorsal appendage curved upward in lateral view.

2

2(1). Pygofer dorsal appendage only slightly curved in lateral view.

R. tecta McAtee

2'. Pygofer dorsal appendages hook-shaped in lateral view.

R. calva Beamer