TABLE 1

Examples of microbes that are most wanted in culture

Candidate organism
or group
Environment(s)PhylumReason for cultivation
SAR202MarineChloroflexiAbundant in mesopelagic
waters
SAR86MarineGammaproteobacteriaAbundant in surface waters
SAR324MarineDeltaproteobacteriaUbiquitous in the dark
ocean
Candidatus Actinomarinidae”MarineActinobacteria (OM1)Streamlined genome and
key role in biogeochemistry
Candidatus Thalassoarchaea”MarineEuryarchaeota (Marine Group II)Abundant and key role in
biogeochemistry
Candidatus Marinimicrobia”MarineCandidate phylum marine group AAbundant and key role in
biogeochemistry
Water column B ThaumarchaeotaMarineThaumarchaeotaKey role in biogeochemistry
Marine group III EuryarchaeotaMarineEuryarchaeotaDeep mesopelagic and
bathypelagic communities
Candidatus Udaeobacer
copiosus”
SoilVerrucomicrobiaNumerically dominant in
some soils
Acidobacteriia spp.SoilAcidobacteriaPotential secondary
metabolite producer
Blastocatellia spp.SoilAcidobacteriaPotential secondary
metabolite producer
Holophagales spp.SoilAcidobacteriaPotential secondary
metabolite producer
Candidatus Rokubacteria”SoilCandidate phylum Rokubacteria (SPAM)Novel phylum
Candidatus Dormibacter”SoilCandidate phylum AD3Novel phylum
Candidatus Eremiobacteraeota”SoilCandidate phylum WPS-2Novel phylum
Anaerobic methanotroph
(ANME) clades 1, 2, and 3
SedimentEuryarchaeotaKey role in biogeochemistry
BathyarchaeotaSedimentCrenarchaeotaKey role in biogeochemistry
Candidatus Atribacteria”SedimentCandidate phylum Atribacteria (OP9/JS1)Key role in biogeochemistry
Assorted ChloroflexiAssortedChloroflexiContaminant remediation and
key roles in biogeochemistry
Candidatus Asgardarchaeota”AssortedCandidate superphylum AsgardarchaeotaNovel phylum key to
eukaryote origins
Any representative of the
Candidate Phylum Radiation
AssortedAssortedDivergent from all cultured
bacteria