Mermudes, J. Ricardo M. & Mattos, I. 2010. Description of Males of <i>Ptychoderes brevis </i>and<i> Ptychoderes jekeli</i>, With a Cladistical Reanalysis of <i>Ptychoderes </i>(Coleoptera: Anthribidae). <i>Annals of the Entomological Society of America</i>, 103(4): 523-531.