(plu. of phylum) In taxonomy, a primary grouping consisting of animals constructed on a similar general plan, and thought to be evolutionarily related. .
Phylum is a taxonomic rank at the level below Kingdom and above Class.
Examples: Porifera (Sponges), Platyhelminthes (flatworms, flukes and tapworms).
Formally, a phylum can be used for any biological domain, but traditionally it was always used for animals, whereas “division” was traditionally often used for plants, fungi, etc.
- Lawrence, E. (2005). Henderson’s dictionary of biology. Pearson Education Limited, 13th ed., Harlow. 748 p