In this article we will discuss about the classification of fishes. Class (1) Pterichthyes (Devonian) (Antiarchi): The members of this class lived in the Devonian period. They are fresh water forms and the fossils that are well-preserved reveal certain internal structures. (i) The head and the thoracic regions are provided with strong bony plates. (ii) The arrangement of the bony [...]
In this article we will discuss about Dipnoi:- 1. Introduction to Dipnoi 2. Geographical Distribution of Dipnoi 3. Palaeozoic Records 4. Habit and Habitat 5. External Structures 6. Skeletal Structures 7. Digestive System 8. Respiratory System 9. Circulatory System 10. Nervous System 11. Endocrine System 12. Excretory System 13. Reproductive System 14. Affinities 15. Cytogenetic Evidence. Contents: Introduction to Dipnoi [...]
The following poionts highlight the top thirteen types of fish. The types are: 1. Cetorhinus (Family Lamnidae) 2. Pristis (Family Pristidae) 3. Sphyrna (Family Sphyrnidae) 4. Polypterus (Bichir) (Family Polypteridae) 5. Acipenser (Family Acipenseridae) 6. Amia (Family Amiidae) 7. Lepisosteus (Family Lepidosteidae) 8. Exocoetus (Family Exocoetidae) 9. Echeneis (Family Echeneidae) 10. Lophius (Family Lophiidae) and Others. Type # 1. Cetorhinus [...]