4. Kingdom Animalia - part 14 - Superclass : Tetrapoda
4. Kingdom Animalia - part 14 - Superclass : Tetrapoda Subphylum : Vertebrata 2. Division : Gnathostomata Superclass : Tetrapoda : These animals bear two pairs of appendages. Some animals like snakes are secondarily limbless. Superclass tetrapoda includes four classes namely - Amphibia Reptilia Aves and Mammalia. 1. Class : Amphibia (Amphi : both, bias : life) : e.g. Rana (Frog), Bufo (Toad), Salamandra (Salamander), I chthyophis (Limbless amphibian), H yla (Tree frog) . Amphibia include the animals which live on land as well as in water (fresh water only). They are poikilothermic animals. Body is differentiated into head and trunk. Neck and tail is usually absent in many adults with few exceptions. Two pairs of limbs arise from pectoral and pelvic girdles respectively. These help in locomotion. Skin is moist, glandular with mucous glands. Exoskeleton is absent. Eyelids are prese...