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''P. piersonii'' was first discovered from surface swabs collected inside the ISS as a part of microbial surveillance intended to monitor contamination and crew health risks.[{{Cite journal |last=Singh |first=Nitin Kumar |last2=Wood |first2=Jason M. |last3=Mhatre |first3=Snehit S. |last4=Venkateswaran |first4=Kasthuri |date=2019 |title=Metagenome to phenome approach enables isolation and genomics characterization of Kalamiella piersonii gen. nov., sp. nov. from the International Space Station |url=https://pubmed.ncbi.nlm.nih.gov/31011775 |journal=Applied Microbiology and Biotechnology |volume=103 |issue=11 |pages=4483–4497 |doi=10.1007/s00253-019-09813-z |issn=1432-0614 |pmid=31011775}}] At the time of discovery, the authors considered the bacterium sufficiently distinct from recognized genera to justify creating a new genus. The bacterium was thus named ''Kalamiella piersonii''.[>{{Cite ]journal |last=Singh |first=Nitin Kumar |last2=Wood |first2=Jason M. |last3=Mhatre |first3=Snehit S. |last4=Venkateswaran |first4=Kasthuri |date=2019 |title=Metagenome to phenome approach enables isolation and genomics characterization of Kalamiella piersonii gen. nov., sp. nov. from the International Space Station |url=https://pubmed.ncbi.nlm.nih.gov/31011775 |journal=Applied Microbiology and Biotechnology |volume=103 |issue=11 |pages=4483–4497 |doi=10.1007/s00253-019-09813-z |issn=1432-0614 |pmid=31011775}}</ref> |
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''P. piersonii'' was first discovered from surface swabs collected inside the ISS as a part of microbial surveillance intended to monitor contamination and crew health risks.[{{Cite journal |last=Singh |first=Nitin Kumar |last2=Wood |first2=Jason M. |last3=Mhatre |first3=Snehit S. |last4=Venkateswaran |first4=Kasthuri |date=2019 |title=Metagenome to phenome approach enables isolation and genomics characterization of Kalamiella piersonii gen. nov., sp. nov. from the International Space Station |url=https://pubmed.ncbi.nlm.nih.gov/31011775 |journal=Applied Microbiology and Biotechnology |volume=103 |issue=11 |pages=4483–4497 |doi=10.1007/s00253-019-09813-z |issn=1432-0614 |pmid=31011775}}] At the time of discovery, the authors considered the bacterium sufficiently distinct from recognized genera to justify creating a new genus. The bacterium was thus named ''Kalamiella piersonii''. |
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Subsequent phylogenetic reassessment of the family Erwiniaceae found that Kalamiella fell within the evolutionary limits of the genus ''[[Pantoea]]'' rather than forming a clearly separate lineage.[{{Cite journal |last=Soutar |first=Craig D. |last2=Stavrinides |first2=John |date=2022 |title=Phylogenomic analysis of the Erwiniaceae supports reclassification of Kalamiella piersonii to Pantoea piersonii comb. nov. and Erwinia gerundensis to the new genus Duffyella gen. nov. as Duffyella gerundensis comb. nov |url=https://pubmed.ncbi.nlm.nih.gov/34988605 |journal=Molecular genetics and genomics: MGG |volume=297 |issue=1 |pages=213–225 |doi=10.1007/s00438-021-01829-3 |issn=1617-4623 |pmid=34988605}}] As a result, the species was transferred to ''Panoea'' and became ''Pantoea piersonii''. |
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Subsequent phylogenetic reassessment of the family Erwiniaceae found that Kalamiella fell within the evolutionary limits of the genus ''[[Pantoea]]'' rather than forming a clearly separate lineage.[{{Cite journal |last=Soutar |first=Craig D. |last2=Stavrinides |first2=John |date=2022 |title=Phylogenomic analysis of the Erwiniaceae supports reclassification of Kalamiella piersonii to Pantoea piersonii comb. nov. and Erwinia gerundensis to the new genus Duffyella gen. nov. as Duffyella gerundensis comb. nov |url=https://pubmed.ncbi.nlm.nih.gov/34988605 |journal=Molecular genetics and genomics: MGG |volume=297 |issue=1 |pages=213–225 |doi=10.1007/s00438-021-01829-3 |issn=1617-4623 |pmid=34988605}}] As a result, the species was transferred to ''Panoea'' and became ''Pantoea piersonii''. |