Phylum: Charophyta Family: Desmidiaceae
Cosmarium galeatum Van Geest & Coesel 2019
First described by Van Geest & Coesel (2019, p. 125, figs. 5,15,16), as one of many crenate species, which can be confusingly similar. The quite large L/B ratio helps to separate it. It would seem to occur predominantly in atmophytic habitats such as ephemeral pools and with moss on wet rocks.
Van Geest, A. & Coesel, P. (2019). Some new and interesting desmids (Streptophyta, Desmidiales) from ephemeral puddles in the urban and industrial areas of Amsterdam (Netherlands).
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium.