Sites, R. W., & Camacho, J. (2014).

Neotropical genera of Naucoridae (Hemiptera: Heteroptera: Nepomorpha): New species of Placomerus and Procryphocricos from Guyana and Venezuela

. Zootaxa, 3753(5), 469–482. https://doi.org/10.11646/zootaxa.3753.5.5