In this article we will discuss about the Dentition in Mammals:- 1. Meaning of Dentition in Mammals 2. Origin and Structure of Teeth in Mammals 3. Types of Dentition 4. Dental Formula 5. Unusual Teeth 6. Origin and Evolution of Molars. Contents: Meaning of Dentition in Mammals Origin and Structure of Teeth in Mammals Types of Dentition in Mammals Dental [...]
Division of the Chiroptera: Two Suborders, Megachiroptera and Microchiroptera, are included under the Order Chiroptera. Besides the common chiropterian features, the suborders differ considerably from each other. The differences are tabulated in Table 45—Chordata. Suborder Megachiroptera: 1. They are large in size among the chiropterans and frugivorous in habit. 2. Eyes are large and snout is elongated. 3. Tail is [...]
Division of the Order: Suborder (i) Archaeoceti: This suborder includes primitive or first whales, the fossil forms of which have been found in the sediments of mideocene. They were large attaining a length of about 18.25 cm. The tail was very long. The forelimbs were modified into paddles. The hind limbs were ill-developed. The skull was more primitive than that [...]