In this article we will discuss about the classification of superclass agnatha. 1. Eel-like animals with circular mouth, slimy, scale less skin and without jaw and unpaired fins with slender cartilaginous fin rays. 2. The brain is encased in a cartilaginous cranium. 3. Pouched gills supported by cartilaginous branchial basket. 4. Notochord, the chief axial support for the body, persists [...]
The upcoming discussion will update you about the difference between petromyzon and myxine. Difference # Petromyzon: 1. Live in rivers and seas. 2. A median, lobed dorsal fin and a tail fin. 3. Sensory structures in the complex, glandular, slimy, pigmented skin. 4. Buccal funnel present, surrounded with papillae. 5. Teeth many, yellow and horny. The tongue also bears horny [...]
In this article we will discuss about:- 1. Description of Lamprey 2. External Features of Lamprey 3. Body Wall and Muscles 4. Digestive System 5. Respiratory System 6. Blood Vascular System 7. Excretory System 8. Nervous System 9. Reproductive System 10. Metamorphosis. Contents: Description of Lamprey External Features of Lamprey Body Wall and Muscles of Lamprey Digestive System of Lamprey [...]