Zwick, P. (2014) “Australian Marsh Beetles (Coleoptera: Scirtidae). 6. Genera Calvarium Pic, Papuacyphon Zwick, and Ypsiloncyphon Klausnitzer”, Zootaxa. Auckland, New Zealand, 3846(1), pp. 1–41. doi: 10.11646/zootaxa.3846.1.1.