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zoological nomenclature, a subphylum is a taxonomic rank below the rank of phylum.
The taxonomic rank of "
- subordinate to the phylum
- superordinate to the infraphylum.
Where convenient, subphyla in turn can be divided into infraphyla; in turn such an infraphylum also would be superordinate to any classes or superclasses in the hierarchy.
Not all fauna phyla are divided into subphyla. Those that are include:
- Trilobitomorpha, Chelicerata, Myriapoda, Hexapoda and Crustacea,
- Craniformea and Rhynchonelliformea,
Examples of infraphyla include the Mycetozoa, the Gnathostomata and the Agnatha.
- Hutchinson, John (1973). The families of flowering plants, arranged according to a new system based on their probable phylogeny. 2 vols (3rd ed.). Oxford University Press.