Procraerus difficilitus Schimmel 2003

Schimmel 2003. [The Megapenthini species of south and south east Asia. Second part: Acumenator, Anchastelater, Dicarinator, Gamepenthes, Ganoxanthus, Martiniana and Simodactylus.] Pollichia-Buch, 42 2003: 1-261