Key to species of the Maladera erlangshanica group:
1 Body larger (> 13 mm), elongate, humeri well developed............... Maladera breviclava Ahrens, Fabrizi & Liu, sp. n.
1’ Body smaller (<12.0 mm), egg-shaped, humeri reduced...................................................... 2
2 Body surface dull........................................... Maladera erlangshanica Ahrens, Fabrizi & Liu, sp. n.
2’ Body more or less shiny................................................................................ 3
3 Body black, strongly shiny. Parameres short (e.g., Fig. 69 E-H).................................................. 5
3’ Body dark brown, weakly shiny. Parameres long (e.g., Fig. 70 E-H).............................................. 4
4 Left paramere distinctly shorter than the right. Right paramere with large basal lobe.......................................................................................... Maladera pingchuanensis Ahrens, Fabrizi & Liu, sp. n.
4’ Parameres subequal in length. Right paramere without basal lobe........ Maladera yunnanica Ahrens, Fabrizi & Liu, sp. n.
5 Right paramere without basal lobe.................................... Maladera aptera Ahrens, Fabrizi & Liu, sp. n.
5’ Right paramere with large basal lobe................................ Maladera queinneci Ahrens, Fabrizi & Liu, sp. n.