homotypic synonym, validly published under the ICNP, distinct rank
Bifidobacteriumpseudolongum subsp. globosum is the correct name if this subspecies is regarded as a separate subspecies within a separate species Bifidobacteriumpseudolongum within a separate genus Bifidobacterium.
The phylogenetic position of this subspecies was determined in a genome-scale analysis by Nouioui et al. (2018).Publication:
Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.