The Class Reptilia includes the snakes, lizards, crocodiles, and turtles of the world. ... Characteristics shared by members of a clade and only by members of that clade are called . They are ectothermic (cold-blooded) and are found mostly in the warmer parts of the world. lizards are included in the Order Squamata. 466pp. More broadly, reptiles are vertebrate animals, meaning they have backbones housing spinal cords that run down the lengths of their bodies—a characteristic they share with birds, fish, mammals, and amphibians. They all live in the Pacific Ocean (Indo-Pacific and eastern tropical Pacific regions). Article Shared By. Question 1. Few of these shed the scales on their skin as skin cast. They have two pairs of pentadactyl limbs, each bearing claws. Mesozoic era is regarded as the age of reptiles. It was first developed in 1676 by John Ray and Francis Willughby, but the current system was devised by Carolus Linnaeus in 1758. Birds … Marine reptiles are divided into several orders: The above list is from the World Register of Marine Species (WoRMS). The Class Reptilia is a grade comprising the scaly tetrapod descendants of Carboniferous Cotylosaurs. The tail may or may not be present. In evolutionary terms, reptiles are intermediate between amphibians (which have moist skin and need to stay near bodies of water) and mammals (which have warm-blooded metabolisms … The Class Reptilia, or reptiles, traditionally included a diverse group of animals: turtles, snakes, lizards and crocodiles, alligators, and caimans. They breathe with lungs at all stages of their lives and have scales. Whereas, Invertebrata hosts animals that don’t have a backbone. The characteristics of the organisms present in class amphibia are as follows: These can live both on land and in water. 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