Eunotia sudetica var. undulata M. Halász, 1941 accepted as
Eunotia sudetica var. zanoagensis Vouilloud & Guerrero, 2021 (replacement name source)
Eunotia sudetica var. zanoagensis Vouilloud & Guerrero, 2021 (replacement name source)
Frustulia calamensis Vouilloud & Guerrero, 2021 (replacement name source)
Frustulia splendida (Frenguelli) Sar & Sala, 2009 accepted as
Frustulia calamensis Vouilloud & Guerrero, 2021 (replacement name source)
Navicula cefarellii Vouilloud & Guerrero, 2021 (replacement name source)
Navicula dicephala var. constricta Frenguelli, 1945 accepted as
Navicula dicephala var. sannicoensis Guerrero & Vouilloud, 2021 (replacement name source)
Navicula dicephala var. sannicoensis Guerrero & Vouilloud, 2021 (replacement name source)
Navicula rhynchocephaloides Frenguelli, 1941 accepted as
Navicula rioplatensis Guerrero & Vouilloud, 2021 (replacement name source)
Navicula rioplatensis Guerrero & Vouilloud, 2021 (replacement name source)
Pinnularia copahuensis Guerrero & Vouilloud, 2021 accepted as
Pinnularia delicata Frenguelli, 1942 (replacement name source)
Pinnularia delicata Frenguelli, 1942 (replacement name source)
Pinnularia lamaroana Guerrero & Vouilloud, 2021 (replacement name source)
Pinnularia wagonensis Guerrero & Vouilloud, 2021 (replacement name source)
Surirella guaraniorum Vouilloud & Guerrero, 2021 (basis of record)
Surirella simplex Frenguelli, 1953 accepted as
Surirella guaraniorum Vouilloud & Guerrero, 2021 (replacement name source)
Vanheurckia splendida Frenguelli, 1936 accepted as
Frustulia calamensis Vouilloud & Guerrero, 2021 (replacement name source)