You're absolutely right that higher taxonomic levels are legacy, but that doesn't mean we still can't see new ones showing up.
Paraliobacillus ryukyuensis gen. nov., sp. nov., a new Gram-positive, slightly halophilic, extremely halotolerant, facultative anaerobe isolated from a decomposing marine alga.
J Gen Appl Microbiol. 2002 Oct;48(5):269-79.
PMID: 12501437 [PubMed - in process]
Oleomonas sagaranensis gen. nov., sp. nov., represents a novel genus in the alpha-Proteobacteria.
FEMS Microbiol Lett. 2002 Dec 17;217(2):255-261.
PMID: 12480113 [PubMed - as supplied by publisher]
Fudou R, Jojima Y, Iizuka T, Yamanaka S.Haliangium ochraceum gen. nov., sp. nov. and Haliangium tepidum sp. nov.: Novel moderately halophilic myxobacteria isolated from coastal saline environments.
J Gen Appl Microbiol. 2002 Apr;48(2):109-16.
PMID: 12469307 [PubMed - in process]
Oleiphilaceae fam. nov., to include Oleiphilus messinensis gen. nov., sp. nov., a novel marine bacterium that obligately utilizes hydrocarbons.
Int J Syst Evol Microbiol. 2002 May;52(Pt 3):901-11.
PMID: 12054256 [PubMed - in process]
[A new family of Alteromonadaceae fam. nov., including the marine proteobacteria species Alteromonas, Pseudoalteromonas, Idiomarina i Colwellia.]
Mikrobiologiia. 2001 Jan-Feb;70(1):15-23. Review. Russian.
PMID: 11338830 [PubMed - indexed for MEDLINE]
Description of Bogoriellaceae fam. nov., Dermacoccaceae fam. nov., Rarobacteraceae fam. nov. and Sanguibacteraceae fam. nov. and emendation of some families of the suborder Micrococcineae.
Int J Syst Evol Microbiol. 2000 May;50 Pt 3:1279-85.
PMID: 10843073 [PubMed - indexed for MEDLINE]
It seems we've got not only new genera but also new families.
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Rrhain
WWJD? JWRTFM!