Morais, K.S., Costa, L.F., Bicudo, C.E.D.M., Ector, L. and Wetzel, C.E. 2020.

A new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from Xingu Ria, Amazon River basin, Brazil

. Phytotaxa. 477, 2 (Dec. 2020), 194–204. DOI:https://doi.org/10.11646/phytotaxa.477.2.4.