MAJEWSKA, Roksana, Mario DE STEFANO, Luc ECTOR, Federico BOLAÑOS, Thomas A. FRANKOVICH, Michael J. SULLIVAN, Matt P. ASHWORTH & Bart VAN De VIJVER 2017 (May 16) Two new epizoic Achnanthes species (Bacillariophyta) living on marine turtles from Costa Rica Botanica Marina 60(3): 303-318, 136 figs., 1 table