Diatom size dataset from Diatoms of North America, USA

Morphometric dataset of 188 genera and 1094 species of diatom from Diatoms of North America (DONA), informing researchers about morphological variations/size reduction phenomenon examined in diatom, which is still lacking in the literature. Findings of this dataset is as follows:
-Extent of size reduction in diatoms is more in asymmetrical than symmetrical forms.
-Extent of size diminution is more in larger than smaller diatoms.
-Benthic life-forms showed lesser extent of size diminution.
-Motile guilds showed lesser extent of size diminution.
-Study informed whether size reduction is due to natural or anthropogenic perturbations.