The key difference between chordates and non chordates stems from the presence and absence of a notochord. Chordates are organisms with a distinct notochord developed into vertebral column. In contrast, non chordates are organisms that do not have a notochord or a vertebral column.
Chordates and non chordates are two phyla that belong to the kingdom Animalia. They are characterized based on primary evolutionary characteristics. Upon evolution, animals developed a notochord which made them Chordates.
1. Overview and Key Difference
2. What are Chordates
3. What are Non Chordates
4. Similarities Between Chordates and Non Chordates
5. Side by Side Comparison – Chordates vs Non Chordates in Tabular Form
What are Chordates?
Chordates or vertebrates have four main features that distinguish them from non chordates. These features show up at some stage of the life cycle of chordates. Those four main features are;
- Pharyngeal slits, which are also called gills
- Dorsal nerve cord which develops into nervous system and brain
- Post-anal tail