Key to “Gonaphodielliform” genera 1. First joint of labial palps as long as second (Fig. 50-51); clypeus subtruncate anteriorly or very feebly sinuate at middle, round at sides; elytra oval, more or less broadened posteriorly, finely striate; body feebly or, at most, moderately convex; mostly medium size species (length 5.0- 6.0 mm). Taxa more or less dark brownish, with or without paler elytral spots. Neotropical region ................................................................................................ Gonaphodiellus Schmidt — First joint of labial palps longer than second (Fig. 69, 117); body more convex; mostly rather small species (length 4.0-5.0 mm) .............................................................................................. 2 2(1). Clypeus deeply sinuate at middle, angulate at sides; elytra subparallel-sided or oval elongate, finely striate; body more or less distinctly convex. Taxa chestnut brown or reddish testaceous, rarely blackish. Neotropical region ........................................... Gonaphodioides new genus — Clypeus feebly sinuate at middle, round at sides; elytra amygdaliform, deeply striate; body strongly convex. Taxa piceous or reddish brown, usually with pronotum and elytral disc darker. Mexico ........................................................................................... Gonaphodiopsis new genus

Published as part of Dellacasa, Marco, Dellacasa, Giovanni & Gordon, Robert D., 2012, Systematic revision of Gonaphodiellus taxa, with description of two new genera and fourteen new species (Coleoptera: Scarabaeidae: Aphodiinae), pp. 1-41 in Insecta Mundi 2012 (230) on page 2, DOI: 10.5281/zenodo.5174222