branhamella branhamella the only species of branhamella (branhamella catarrhalis) is reclassified to moraxella catarrhalis. branhamella scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: moraxellaceae genus: branhamellacatlin 1970 type species moraxella catarrhalis(branhamella catarrhalis) species branhamella catarrhalis