![](/images/information.png)
Classification of the recent Elasmobranchii. Copyright Brian Mould 1997
Potamotrygon schuemacheri IUCN 2012, IUCN Red List of Threatened Species, Version 2012.2, https://www.iucnredlist.org
![](/images/information.png)
Checklist of living Chondrichthyes. In W.C. Hamlett (Ed.), Reproductive biology and phylogeny of chondrichthyes: sharks, rays and chimaeras, Vol. 3 (pp. 503–548). Science Publishers, Endfield, USA
![](/images/information.png)
A survey of tail spine characteristics of stingrays frequenting western Atlantic Ocean and South American freshwater rivers. Journal of the North Carolina Academy of Science, 125(2), 47–60
![](/images/information.png)
Distinct Responses of Elasmobranchs and Ray-Finned Fishes to Long-Term Global Change. Frontiers in Ecololgy and Evolution, 7, Article 513
DOI: 10.3389/fevo.2019.00513
![](/images/information.png)
Independent Transitions to Freshwater Environments Promote Phenotypic Divergence, Not Convergence, in Stingrays. Integrative and Comparative Biology, in press
DOI: 10.1093/icb/icae023