Euryarchaeota
Halobacterium sp. gregis (Anglice strain) NRC-1, quaque cellulá circa 5 µm longa Archaea —  Euryarchaeota — Euryarchaeota Woese, Kandler & Wheelis, 1990     Subdivisiones: Classes * Archaeoglobi Halobacteria Methanobacteria Methanococci Methanomicrobia Methanopyri Thermococci Thermoplasmata Synonyma * Euryarchaeota Woese et al. 1990 Euryarchaeota Garrity and Holt 2002 non Euryarchaeota Cavalier-Smith 2002 Euryarchaeota (ex verbo Graeco 'lata vetusta qualitas') in taxinomia microorganismorum sunt Archaeorum phylum, quod comprehendit methanogena (methanum gignentia, saepe in intestinis animalium inventa), halobacteria (quae extremas salis concentrationes superant), et aliquos organismos aerobios et anaerobios summe thermophiliacos. Omnes ab aliis archaeanis praecipue secundum sequentias rRNA distinguuntur.