Shimwellia blattae
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History and taxonomy
The bacterium was first described in 1973 under the name Escherichia blattae after isolation from the hindgut of the cockroach species Blatta orientalis. It was reclassified in the genus Shimwellia based on phylogenetic analyses of its genome sequence.
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Genome
The genome of S. blattae is about 4.2 megabases in size, slightly smaller than similar enteric bacteria found in humans. It has 56.5% GC content, significantly higher than E. coli. Genomic analysis suggests that the ability of S. blattae to synthesize vitamin B12 has its origins in horizontal gene transfer.
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GenusTaxonomic rank above species and below familyFamily (taxonomy)Taxonomic rank between genus and orderEndemismState of species being unique to a locationCladeGroup of a common ancestor and all of their descendantsGenomeAll genetic material of an organismOrder (taxonomy)Taxonomic rank between class and family