Petersen, H. C. B., B. C. Gonzalez, A. Martínez, and K. Worsaae. “New Species of Pisionidens (Sigalionidae, Annelida) from Akumal, México ”. Zootaxa, vol. 4136, no. 1, July 2016, pp. 165–173, doi:10.11646/zootaxa.4136.1.8.