FIGURES 329 in Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species

FIGURES 329. Stacked outlines showing the shape variation of valve outline accessing the superimposed images and the range of shapes as reflected in PC1 and PC2s (A. acutum sp. nov.: 18 valves; A. brasiliense sp. nov.: 20 valves; A. lineare: 20 valves; A. minutissimum: 13 valves.Published as part of Costa, Lívia F., Wetzel, Carlos E., Maquardt, Gisele C., Zanon, Jaques E., Ector, Luc & Bicudo, Denise C., 2022, Taxonomy and ecology of Achnanthidium (Bacillariophyta, Achnanthidiaceae) from southeastern Brazil with the description of six new species, pp. 187-223 in Phytotaxa 575 (3) on page 216, DOI: 10.11646/phytotaxa.575.3.1, http://zenodo.org/record/743124