Sporomusa

Sporomusa is a genus of Firmicutes bacteria classified within the class Negativicutes. 
Further examination of members of this clade suggest that this group are actually members of the "Clostridia".
Phylogeny.
The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LSPN) and the phylogeny is based on 16S rRNA-based LTP release 111 by The All-Species Living Tree Project 