• General Biology / General Zoology

• Phylum Chordata
• Subphylum Vertebrata
• Class Mammalia
• Class Aves
• Class Reptilia
• Class Amphibia
• "Superclass" Pisces (classes Agnatha, Chondrichthyes and Osteichthyes plus class Myxini, outside Vertebrata sens. strict.)
• Class † Conodonta
• Subphylum Cephalochordata
• Subphylum Urochordata (=Tunicata)

• Phylum † Vetulicolia
• Phylum Hemichordata
• Classes Enteropneusta and Pterobranchia
• Class † Graptolithina
• Phylum Echinodermata
• Phylum Arthopoda
• Subphylum Hexapoda (Classes Insecta, Collembola, Diplura, Protura)
• Subphylum Chelicerata (Classes Arachnida, Merostomata (including † Eurypterida) and Pycnogonida)
• Subphylum Crustacea
• Subphylum Myriapoda (Classes Chilopoda, Diplopoda, Pauropoda and Symphyla)
• Subphylum Trilobitomorpha
• Phylum Priapulida
• Phylum Loricifera
• Phylum Kinorhyncha
• Phylum Nematomorpha
• Phylum Nematoda (=Nemata)
• Phylum Tardigrada
• Phylum Onychophora
• Phylum Gastrotricha
• Phylum Chaetognatha
• Phylum Phoronida
• Phylum Bryozoa (=Ectoprocta)
• Phylum Brachiopoda
• Phylum Annelida
• Phylum Sipuncula
• Phylum Mollusca
• Phylum Nemertea
• Phylum Platyhelminthes
• "Phylum" †Hyolitha
• "Phylum" †Agmata
• Phylum Entoprocta
• Phylum Cycliophora
• Phylum Acanthocephala
• Phylum Rotifera
• Phylum Micrognathozoa
• "Phylum" Mesozoa
• Phylum Ctenophora
• Phylum Cnidaria (=Coelenterata)
• Phylum Myxozoa
• Phylum Porifera
• Phylum † Archaeocyatha
• Phylum Placozoa
• Phylum † Vendobionta
• Phylum † Trilobozoa
• Phylum † Chitinozoa
• Phylum Protozoa
• Animalia - miscellaneous (including fossil Problematica and other groups)

"Plant" groups, plus fungi, bacteria and viruses:

• General Botany
• Angiosperms
• Gymnosperms
• Ferns and allies
• Bryophyta
• Algal groups
• Fungi and Lichens
• Prokaryota (Archaea and Bacteria, including Cyanobacteria)
• Viruses