In this article we will discuss about the historical resume and classification of jawless vertebrates. Historical Resume: L. Agassiz (1857) placed the agnaths under the class Myzontes and proposed the following scheme for the lampreys and hagfishes: Class I. Myzontes. Order 1. Myxinides and Order 2. Cyclostomi. E. S. Goodrich (1909) gave the following classification […]
Jawless Vertebrates: Historical Resume and Classification
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Hagfish: Structure, Affinities, System and Other Details
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In this article we will discuss about Hagfish:- 1. Introduction to Hagfish 2. Habit and Habitat of Hagfish 3. External Structures 4. Digestive System 5. Respiratory System 6. Circulatory System 7. Nervous System 8. Excretory System 9. Reproductive System 10. Development 11. Affinities and Systematic Position. Contents: Introduction to Hagfish Habit and Habitat of Hagfish […]
Lampreys: Subject Matter, Structures and Sense Organs
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In this article we will discuss about Lampreys:- 1. Subject Matter of Lampreys 2. Habit and Habitat of Lampreys 3. External Structures 4. Skeletal Structures 5. Digestive System 6. Respiratory System 7. Circulatory System 8. Arterial System 9. Venous System 10. Nervous System 11. Excretory System 12. Reproductive System 13. Development. Contents: Subject Matter of […]
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