Two unknown gram-positive, rod-shaped bacteria isolated from a tortoise and a Scottish wild cat were subjected to a polyphasic taxonomic analysis. Chemical analysis revealed the presence of straight-chain and monounsaturated fatty acids and short-chain mycolic acids in the two isolates consistent with the genus Corynebacterium. Comparative 16S rRNA gene sequencing confirmed that the unknown isolates were members of the genus Corynebacterium, with the two organisms displaying greater than 3% sequence divergence from each other and from established species of the genus. The unknown Corynebacterium isolates were readily distinguished from each other and from all recognized species of the genus by biochemical tests. Based on phylogenetic and phenotypic evidence, it is proposed that the unknown organisms from a tortoise and a cat be classified in the genus Corynebacterium as Corynebacterium testudinoris sp. nov. and Corynebacterium felinum sp. nov., respectively. The respective type strains of C. testudinoris and C. felinum are CCUG 41823T and CCUG 39943T.


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