I am looking for literature citations that describe cyanobacteria taxa at the species or genera levels.  I also would like to know who is an authority (past or current) or person actively working on cyanobacteria taxonomy or biology. 

These are tough questions for lichenologists. Morphology-based names like Nostoc commune go back a long time, but now when people study cyanobacteria they are usually using DNA sequences. And as you might expect, the external morphology barely begins to capture the phylogeny. You might check the latest issue of the Bryologist for a paper by Suzanne Joneson that analyzes relationships between ground-dwelling cyanolichens and associated free-living Nostoc.