Key to the species of Lebetus

1a P 17–21, A I/7–9. ........................................................................... L. scorpioides

1b P 14–17, A I/4–6. ..................................................................................... 2

2a Snout slightly larger than eye diameter; minute “black pepper spots” on predorsal area, dorsum, flanks and caudal peduncle, visible in fresh and preserved specimens; the most of the caudal peduncle similarly colored as the lateral area below D2, reddish or brown with no sharp dark-pale boundary between caudal peduncle and the rest of the body........... L. patzneri sp. nov.

2b Snout clearly shorter than eye diameter; no minute “black pepper” spots anywhere; sharp vertical S-shaped boundary between pale caudal peduncle and darker lateral area below D2 clearly visible despite inter- and intraspecific coloration variability............................................................................................... L. guilleti