arheoonid
Arheoonid are a proposed group of ancient, extremophilic microorganisms that appear in some microbiological discussions as part of the wider Archaea domain. The term is not universally recognized as a formal taxon; it is used in metagenomic analyses to describe archaeal lineages inferred from environmental DNA without cultivated representatives.
Taxonomy and nomenclature: Because there is no cultured organism or formal naming, arheoonid is not assigned
Characteristics: Inferred arheoonid members are expected to be unicellular prokaryotes with hallmark archaeal features such as
Ecology and distribution: Detected primarily in extreme environments—deep-sea hydrothermal vents, hypersaline lakes, subglacial ecosystems, and anoxic
Significance and uncertainty: The arheoonid concept reflects ongoing questions about the early diversification of Archaea and