In this article we will discuss about the meaning and types of pademorphosis. Meaning of Paedomorphosis: The phenomenon of attainment of sexual maturity leading to reproduction in an arrested larval stage (pre-adult stage) is called Paedogenesis (Gk. pais; child; morphe form). The term first used by Von Baer (1866). Neoteny (Gk. neos, young, teinein, to stretch), a term first introduced [...]
The following points highlight the fifteen main types of amphibians. The types are: 1. Giant Salamander (Family Cryptobranchidae) 2. Cryptobranchus (Family Cryptobranchidae) 3. Necturus (Family Proteidae) 4. Proteus (Family Proteidae) 5. Siren (Family Sirenidae) 6. Amphiuma (Family Amphiumidae) 7. Ambystoma (Family Ambystomatidae) 8. Triturus (Family Salamandridae) and Others. Type # 1. Giant Salamander (Family Cryptobranchidae): Megalobatrachus (Fig. 7.29A) is a [...]
In this article we will discuss about Amphibians:- 1. Origin of Amphibia 2. Factors that Caused Amphibian Evolution 3. Probable Ancestry 4. Structure of Amphibians 5. Digestive System of Amphibians 6. Respiratory System and Sound Production 7. Circulatory System 8. Nervous System 9. Urinogenital System 10. Reproduction and Development 11. 11. Reasons for Extinction. Contents: Origin of Amphibia Factors that [...]