Key to the species of genus Zerconella

1. Caudodorsal surface without elevations, surface of opisthonotum without ornamentation [subgenus Zerconella (Zer- conella)] ..................................................................................................................... Zerconella (Zerconella) leitnerae

- Caudodorsal surface with characteristic elevations, surface of opisthonotum with alveolar ornamentation [subgenus Zerconella (Metazercon)].............................................................................................................................................. 2

2. J-series with six pairs of setae, four dorsal cavities present ................................... Zerconella (Metazercon) mahunkai

- J-series with at most five pairs of setae, only two pairs of dorsal cavities present....................................................... 3

3. J-series with four pairs of setae .......................................................................... Zerconella (Metazercon) lobata sp. n.

- J-series with five pairs of setae ..................................................................................................................................... 4

4. Setae J5 short, situated posterolaterally to J4 ........................................................... Zerconella (Metazercon) athiasae

- Setae J5 long, situated posteromedially to J4 ........................................................... Zerconella (Metazercon) rafalskii