Diversity of microorganisms isolated from amber. Sporosarcina - forms distinctive tetrads . . The high GC group can be broken into about ten major genera and were traditionally divided into the Coryneform Bacteria and the Actinomycetes. Overall, the term Actinobacteria encompasses both of these groups. Coryneform Bacteria Arthrobacter spp.
Some species are very common in cattle rumens and on human skin.
We will touch upon a few genera today and come back to others later in the course. Millions to billions per gram of soil. Some form elaborate spore-bearing structures. Actinomyces - only actinomycetes that are facultative aerobes. Very common in air, on skin.