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Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds, and mammals).
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The evolution of tetrapods began about 400 million years ago...
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The Batrachomorpha ("frog forms") are a clade containing...
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The Lissamphibia (from Greek λισσός (lissós, "smooth") +...
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Amphibians are ectothermic, tetrapod vertebrates of the...
- Portal:Amphibians
Amphibians are ectothermic, anamniotic, four-limbed...
- Mexican Burrowing Caecilian
Mar 18, 2024 · Learn about amphibians, the vertebrates that can live in water and on land. Find out how they evolved, what they look like, and how they reproduce in this comprehensive article from Britannica.
- Living Amphibia
- Anura
- Caudata
- Gymnophiona
- Reproduction
- Habitats
- Anatomy
- Diet
- Conservation
- Human Use
Anura: Frogs(including toads)Caudata: Salamanders (including newts)Gymnophiona: Legless amphibia, similar to earthworms or snakesThe orderAnura includes the frogs and toads. There is no fundamental difference between frogs and toads. Frogs have a short body, webbed digits (fingers or toes), protruding eyes, forked tongue and no tail. They are exceptional jumpers: many of their features, particularly their long, powerful legs, are adaptations to improve jumping performance. T...
The order Caudata is the salamanders. Newts are salamanders which spend their life in the water even though they are adults. They are classified in the subfamily Pleurodelinae of the family Salamandridae. Respiration differs between species of salamanders. Species that lack lungs respire through gills. In most cases, these are external gills, visib...
The order Gymnophiona includes the caecilians. These are long, cylindrical, limbless animals that look like snakes or worms. Their skin has circular folds, increasing their similarity to the segments of earthworms. Some are aquatic, but most live underground in burrows they hollow out. Many caecilians give birth to live young. In species which lay ...
Amphibians are the only vertebrates to go through metamorphosis. This means that their young look different from their adult.p8 Amphibians usually reproduce in early spring to late summer, though some reproduce in winter and fall.p156 Most frogs and toads, such as the common frog (Rana temporalis), gather in large groups to ponds, rivers, swamps an...
Salamanders and newts can be found living in streams. Salamanders can be found in rotten logs, holes or underground places that are wet such as under leaves.p152 Web-toed salamanders live in habitats where there are a lot of rocks. They like to hide under rocks and stones.p195 The tailed frogs, like to live in cold water habitats.p199In their habit...
Skin
Many amphibia have secretions in their skin which makes them toxic. They do not produce toxins themselves. They get toxins from what they eat. They eat insects in their habitat. These insects get the poison from a plant. The toxin has been discovered in beetles. This means that they are likely the cause of poisons found in amphibians. Amphibians do not produce batrachotoxin in captivity, which means that it is not harmful to touch them. The American Indian tribe comechingóns used the toxins o...
Senses and skeletal system
Amphibians' eyes have lids, glands and ducts. They have good colour vision Caecilian eyes are small and dark. Most of them are blind. Most amphibians have a good sense of smell, even underwater. The skeletal system of amphibians are similar to other four-legged animals. They have a spine, rib cage, long bones such as the humerus and femur. They also have short bones such as the phalanges, metacarpals, and metatarsals. Most amphibians have four limbs, except for caecilians. The bones in amphib...
Amphibia are predators. They mostly eat live invertebrates and animals that do not move too quickly. These include caterpillars, earthworms, crayfish, water beetles, snails and dragon fly larvae.p667 Many amphibians use their sticky tongues to catch their prey. They swallow the animal whole, but may chew it just a bit for it to go down their throat...
The amphibian population have been decreasing from all locations in the world. Scientists have said that the declining of amphibians is one of the most critical threats to global biodiversity. A number of causes are believed to be involved. These include habitat destruction, over-exploitation, pollution, introduced species, climate change, destruct...
As food
Bullfrog legs are a source of food for Southern United States and the Midwestern United States. People hunt bullfrogs at night near rivers. The bullfrogs' legs are cooked, while their backs are fried.p9 In China, bullfrogs are sold alive for eating. However, they are later cooked dead with vegetables. In the state of California, people must have a license to catch bullfrogs for food.p256 In schools, bullfrogs are dissected in biology classes. Usually, this is done in grammar school.p85 The di...
As pets
Amphibians are also kept as pets.p4 They are kept in aquariums or a terrarium. A terrarium is a tank that is decorated with plants and soil on one side. On the other side, there is water. Most amphibians would need one place for land and another for water.p8 Each type of amphibian should have its special needs taken care of. Semi-aquatic amphibians need both land and water divided in the tank. Tropical frogs would need mist and high humidity in their terrariums.p7 Water for amphibia needs dec...
Learn about amphibians, small vertebrates that need water to survive, and their special features, such as their skin glands, egg-larva-adult life cycle, and ability to produce useful proteins. Explore photos, videos, and stories of different amphibian species, from frogs and toads to salamanders and newts, and their challenges and conservation.
Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, excluding the amniotes.
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