Sinodiapterna, Dellacasa, 1986

Shabalin, S. A., 2018, First record of Sinodiapterna songrini (Stebnicka et Galante, 1992) (Coleoptera: Scarabaeidae) from Russia, Far Eastern Entomologist 363, pp. 8-10 : 9

Key to species of the genus Sinodiapterna from the Russian Far East

1. Elytra with denticles in the shoulder area. Russia: Primorskii krai .................................... .......................................................................................... S. gorodinskiyi (Gusakov, 2006)

– Elytra without denticles in the shoulder area ................................................................... 2

2. Head coarsely punctured. Elytral striae feebly but distinctly crenulate. Nearly entirely black, shining. Russia: Krasnoyarskii krai, Amurskaya oblast , Jewish autonomous region, Khabarovskii krai, Primorskii krai, Sakhalin, Kunashir. – China (Heilongjiang), North Korea (Yanggang-do), Japan (Hokkaido, Honshu, Kyushu) .............................................. ................................................................................................. S. troitzkyi (Jacobson, 1896)

– Head rugose punctured. Elytral striae not crenulate. Nearly entirely black, strongly shining ............................................................................................................................................ 3

3. Epistom distinctly gibbous, with small curve carina, frontal suture strongly carinate, at middle feebly upturned. Pronotum as wide as long. Russia: Primorskii krai. – China (Heilongjiang) ................................................................... S. hammondi (Dellacasa, 1986)

– Epistom without trace of carina, frontal suture not elevated market by line. Pronotum two times as wide as long. Russia: Primorskii krai. – North Korea (Yanggang-do) ............. .............................................................................. S. songrini (Stebnicka et Galante, 1992)