Tag: amphibia

Ophisaurus ,occurs in southern Europe, is a limbless lizard 

Anapsida has a solid roof due to the absence of any temporal vacuities on skull.

Ophisaurus, commonly known as the glass lizard, is a genus of reptiles that look like snakes but are actually legless lizards.

Crocodiles, alligators, and tortoises are all members of the class Reptilia.

Living fossil lizard of new zeal and sphenodon belongs to Rhyncocephalia. The single species of Tuatara is the only surmising member of its order, which flourished around 200 million years ago.

Cotylosauria, often called stem reptiles, are the most primitive reptiles and are characterized by an anapsid skull, meaning they lack temporal fossae. Chelonia (turtles) also have anapsid skulls, but Cotylosauria is the broader ancestral group typically associated with this definition in evolutionary biology contexts.

Dinosaurs are divided into two orders based on their pelvic structure: Saurischia (lizard-hipped) and Ornithischia (bird-hipped). Saurischia includes both theropods and sauropods.

• The anterior middle portion of vertebrae is known as centrum and a posterior vertebral arch known as the neural arch. 
• The procoelous vertebra is convex at the anterior side while convex at the posterior side. 
• Ophidia is a suborder that includes snakes and reptiles and has procoelous vertebrae.
• So option A is the correct answer