Difference between Protostomes and Deuterostomes | Phylum Chordata

The upcoming discussion will update you about the difference between protostomes and deuterostomes.

Difference # Protostomes:   

1. Cleavage:

Spiral, determinate or mosaic

2. Blastopore:

Mouth develops from blastopore

3. Coelom:

Schizocoelic (splitting of mesodermal)

4. Mesoderm:

From 4d cell, proliferation

5. Arrangement of coelomic cavities:

Variable in number

6. Larval type:

Trochophore

7. Larval ciliary bands:

Compound cilia from 1 multi-ciliated cells

8. Example:

Annelida, Echiura, Pogonophora, Sipuncula, Arthropoda, Mollusca, Nemertea except crabs, insects and squids.

Difference # Deuterostomes:

1. Cleavage:

Radial, indeterminate or regulative

2. Blastopore:

Mouth does not form from blastopore

3. Coelom:

Enterocoelic (evagination of pouches from the wall of archenteron)

4. Mesoderm:

From gut wall, in-folding

5. Arrangement of coelomic cavities:

Generally in three pairs

6. Larval type:

Dipleurula

7. Larval ciliary bands:

Simple cilia and single cilium in each cell

8. Example:

Echinodermata, Hemichordata and Chordata except ascidiaceans.