superkingdomn.

1904 Jrnl. Geol. (Chicago) 12 44 Unless we invent superclasses and superkingdoms, or some entirely new classificatory denominations, an impassable wall will soon be reached, when all the orders are leveled up to subclasses, and we are no nearer a final symmetrical classification than we were.

1969 New Phytologist 68 592 It is also evident that these two groups [sc. Procaryota and Eucaryota] merit the status of kingdoms, or perhaps even superkingdoms, since the differences between them transcend those between the often accepted kingdoms, Protista, Plantae and Animalia.

1991 New Scientist 23 Mar. 47/2 In Woese's classification, archaea and eubacteria acquire the status of superkingdoms—or ‘domains’. Their third domain comprises all eukaryotes.

2001 G. Piel Age of Sci. v. 306 The best definition of a species bacteriologists can offer is the sharing of 85 percent of traits in common. This is not a distinction that endures and surely does not define a ‘species’ in the eukaryotic superkingdom.