Hezil, Djamila2025-10-082025https://dspace.univ-boumerdes.dz/handle/123456789/15541This handwork is intended for third-year students in Microbial Biotechnology (L3 BTM) as part of the Bacterial Taxonomy module. It aims to provide an in-depth understanding of the fundamental principles of microorganism classification, focusing on systematics, bacterial and archaeal diversity, and the classification criteria used in microbiology. The objective of this document is to help students develop a structured understanding of microbial diversity, based on modern taxonomic approaches and the Bergey’s Manual classification, a key reference in the field......enBacterial TaxonomyMicrobial systematicsMethanogens.Other