REAGENT or RESOURCE	SOURCE	IDENTIFIER
Bacterial and virus strains
Stigonema robustum	Mareš et al., 201581 (CBFS herbarium of the botany department of the University of South Bohemia (České Budějovice, Czech Republic)	CBFS-A027
Stigonema informe	Mareš et al., 201581 (CBFS herbarium of the botany department of the University of South Bohemia (České Budějovice, Czech Republic)	CBFS-A033
Stigonema turfaceum	Mareš et al., 201581 (CBFS herbarium of the botany department of the University of South Bohemia (České Budějovice, Czech Republic)	CBFS-A031
Stigonema ocellatum	Göttingen university “The Sammlung von Algenkulturen der Universität Göttingen” (SAG)	SAG 48.90
Calothrix sp.	Belgian Culture Collection of Microorganisms/Université of Liège Cyanobacteria collection	BCCM/ULC003
Bangiopsis franklynottii	Bigelow Laboratory for Ocean Sciences National Center for Marine Algae and Microbiota collection	CCMP3416
Critical commercial assays
LR White embedding kit	Sigma-Aldrich	62662-1EA-F
Araldite/Embed EMBEDDING kit (Mollenhauer formula)	Electron Microscopy Sciences	Cat. #13940
Experimental models: Organisms/strains
Microfossils Polysphaeroides filiformis	This paper (Early Life Traces and Evolution – Astrobiology Laboratory (UR Astrobiology))	N/A
Software and algorithms
AxioVision SE64 Rel. 4.9.1.	Zeiss	https://www.micro-shop.zeiss.com/en/us/system/axiovision+software/software+axiovision/axiovision+program/410130-0909-000
Rstudio 4.1.1	RStudio Team, 2020	https://posit.co/download/rstudio-desktop/
Wire 4.2	Renishaw	Renishaw: enhancing efficiency in manufacturing and healthcare
OPUS 8.0	Bruker	Bruker Optik GmbH 2017
PyMCA	Solé et al., 2007122	http://www.silx.org/doc/PyMca/dev/index.html
Athena	Ravel and Newville, 2005123	https://bruceravel.github.io/demeter/
Inkscape	Inkscape Project, 2020	https://inkscape.org/fr/
MatLab	MathWorks	https://www.mathworks.com/products/matlab.html
Other
XRF Reference Sample	AXO Dresden GmbH	RF7-200-S2372