In life, a subphylum is a taxonomic rank intermediate between phylum and superclass. The rank of subdivision in plants and fungi is equivalent to subphylum. Not all phyla are divided into subphyla. Those that are include:
- Arthropoda: divided into subphyla Trilobitomorpha, Chelicerata, Myriapoda, Hexapoda and Crustacea,
- Brachiopoda: divided into subphyla Linguliformea, Craniformea and Rhychonelliformea,
- Chordata: divided into Urochordata, Cephalochordata and Craniata.
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| Domain or | Magnorder | |||||||
| Superkingdom | Superphylum/Superdivision | Superclass | Superorder | Superfamily | Superspecies | |||
| Kingdom | Phylum/Division | Class | Order | Family | Tribe | Genus | Species | |
| Subkingdom | Subphylum | Subclass | Cohort | Suborder | Subfamily | Subtribe | Subgenus | Subspecies |
| Branch | Infraphylum | Infraclass | Legion | Infraorder | Alliance | Infraspecies | ||
| Microphylum | Parvclass | Parvorder | ||||||
