tetrapod, (superclass Tetrapoda), a superclass of animals that includes all limbed vertebrates (backboned animals) constituting the classes Amphibia (amphibians), Reptilia (reptiles), Aves (birds), Mammalia (mammals), and their direct ancestors that emerged roughly 397 million years ago during the Devonian Period.

Which is from superclass Tetrapoda?

tetrapod, (superclass Tetrapoda), a superclass of animals that includes all limbed vertebrates (backboned animals) constituting the classes Amphibia (amphibians), Reptilia (reptiles), Aves (birds), Mammalia (mammals), and their direct ancestors that emerged roughly 397 million years ago during the Devonian Period.

What are the characteristics of Tetrapoda?

Key Characteristics

  • Four limbs (or descended from ancestors with four limbs)
  • Various adaptations of the skeleton and muscles that enable proper support and movement on land.
  • Adaptations to the cranial bones that allows the head to remain stable while the animal moves.

How many classes are found in superclass Tetrapoda?

Tetrapoda includes four living classes: amphibians, reptiles, mammals, and birds.

What type of phylogenetic group is Tetrapoda?

Tetrapods are part of a larger groups called Sarcopterygii, which also includes several groups of lobe-finned fish, such as lungfish and the coelacanth. The Sarcopterygii are just one group of vertebrates, or animals with a backbone.

Are humans tetrapod?

The term tetrapod refers to four-limbed vertebrates, including humans.

Why are snakes tetrapods?

Reptiles are tetrapods. Limbless reptiles—snakes and other squamates—have vestigial limbs and, like caecilians, are classified as tetrapods because they are descended from four-limbed ancestors.

Why are frogs tetrapods?

Evolution of Amphibians Both were aquatic, and may have had both gills and lungs. They also had four limbs, with the skeletal structure of limbs found in present-day tetrapods, including amphibians. However, the limbs could not be pulled in under the body and would not have supported their bodies well out of water.

What do you mean by amniotes?

Definition of amniote : any of a group (Amniota) of vertebrates that undergo embryonic or fetal development within an amnion and include the birds, reptiles, and mammals.

Is Tetrapoda a phylum?

ChordateTetrapods / Phylum

Is Tetrapoda a monophyletic group?

Monophyletic groups are the only groups that can be circumscribed by objective boundaries, defined by characters. In evolutionary terms, monophyletic groups comprise the most recent common ancestor and all of its descendants. In Fig. 2, Amniota, Tetrapoda, Osteichthyes, and Gnathostomata are all monophyletic.

What did fish evolve from?

Fish may have evolved from an animal similar to a coral-like sea squirt (a tunicate), whose larvae resemble early fish in important ways. The first ancestors of fish may have kept the larval form into adulthood (as some sea squirts do today), although this path cannot be proven.

What is a tetrapod class?

(Show more) tetrapod, (superclass Tetrapoda), a superclass of animals that includes all limbed vertebrates (backboned animals) constituting the classes Amphibia ( amphibians ), Reptilia ( reptiles ), Aves ( birds ), Mammalia ( mammals ), and their direct ancestors that emerged roughly 397 million years ago during the Devonian Period.

What are the two subclades of crown tetrapods?

The two subclades of crown tetrapods are Batrachomorpha and Reptiliomorpha. Batrachomorphs are all animals sharing a more recent common ancestry with living amphibians than with living amniotes (reptiles, birds, and mammals). Reptiliomorphs are all animals sharing a more recent common ancestry with living amniotes than with living amphibians.

What is the superclass of the first four-limbed vertebrates?

Superclass of the first four-limbed vertebrates and their descendants. Tetrapods (/ˈtɛtrəpɒd/; from Greek: τετρα- “four” and πούς “foot”) are four-limbed (with a few exceptions, such as snakes) animals constituting the superclass Tetrapoda. It includes extant and extinct amphibians, reptiles (including dinosaurs), birds, and mammals.

Where can I find media related to Tetrapoda?

Wikimedia Commons has media related to Tetrapoda. Benton, Michael (5 February 2009). Vertebrate Palaeontology (3 ed.). John Wiley & Sons. p. 1. ISBN 978-1-4051-4449-0. Retrieved 10 June 2015. Clack, J.A. (2012). Gaining ground: the origin and evolution of tetrapods (2nd ed.).