Phenotypic and phylogenetic studies were performed on a hitherto undescribe
d micro-organism isolated from a minke whale (Balaenoptera acutorostrata).
Comparative 16S rRNA gene sequencing studies demonstrated that the unknown
strain constituted a new subline close to, but distinct from, Abiotrophia a
diacens and Abiotrophia elegans. The unknown bacterium was readily distingu
ished from these two Abiotrophia species by biochemical tests and electroph
oretic analysis of whole-cell proteins. On the basis of phylogenetic and ph
enotypic evidence, it is proposed that the unknown bacterium be classified
as Abiotrophia balaenopterae sp. nov., the type strain of which is M1975/96
/1(T) (= CCUG 37380(T)).