Name	Info	Provider	Link
	subscription/membership/fee required	BioOne	https://doi.org/10.2987/5745.1
SILVA SSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/ssu/pubid/18939699
	free resource	Silverchair Information Systems	https://meridian.allenpress.com/jamca/article-lookup/doi/10.2987/5745.1