Saprosites, Redtenbacher, 1857

Minkina, Łukasz & Skelley, Paul, 2025, Studies on Eupariini Schmidt, 1810 (Coleoptera: Scarabaeidae: Aphodiinae) with description of the new species of Ataenius Harold, 1867 and Saprosites Redtenbacher, 1857, Zootaxa 5633 (2), pp. 384-393 : 391

Changes and distinctions to the key of Stebnicka (2012) to the Indonesian species of Saprosites :

14. Genae right-angled or obtusely rounded, more or less prominent; pronotum without lateral depression and without median longitudinal line; colour black or rufous.................................................................. 15

– Genae sharply protruding; pronotum with lateral depression and usually with median longitudinal line ( S. halmaheiraensis Minkina & Skelley , new species —always without median longitudinal line); colour castaneous ( S. halmaheiraensis Minkina & Skelley , new species —colour dark brownish).............................................................. 19

20. Elytra narrower than pronotum, slightly convergent apically. Elytra more distinctly elongate. Banguey I., Irian Jaya ...................................................................................... bangueyensis Paulian, 1944

– Elytra as wide as pronotum, slightly divergent apically, strial punctures moderate in size. Elytra less distinctly elongate.. 20a

20a. Anterior sinuation of clypeus less distinct. Sides of pronotum more distinctly sinuate before posterior angles. Larger punctation of the pronotum sparser, irregularly distributed, punctation of pronotum not concentrate along the median longitudinal line. Very coarse punctation of elytral striae.............................. halmaheiraensis Minkina & Skelley , new species

– Anterior sinuation of clypeus more distinct. Sides of pronotum less distinctly sinuate before posterior angles. Larger punctation of the pronotum denser, quite regularly distributed, punctation of pronotum clearly concentrate along the median longitudinal line. Much less coarse punctation of elytral striae.............................................. narae Lewis, 1895

Another externally similar to S. halmaheiraensis Minkina & Skelley , new species is also a widely distributed S. japonicus Walterhouse, 1875 , which can be easily distinguished by the much less conspicuously protruding genae and characteristic protuberances on the sides of the pronotum, in front of the posterior angles (compare with figs: 1, 2, 8, 11 in Kawai et al. 2005).