Amphibians Introduction Notes

Class Amphibia

Class Amphibia

The word amphbia comes from Greek origins

Class Amphibia

The word amphbia comes from Greek origins

Amphi -

Class Amphibia

The word amphbia comes from Greek origins

Amphi - double

Class Amphibia

The word amphbia comes from Greek origins

Amphi - double

bios -

Class Amphibia

The word amphbia comes from Greek origins

Amphi - double

bios - life

Class Amphibia

The word amphbia comes from Greek origins

Amphibios - double life

This refers to the fact that amphibians live a “double life”……

This refers to the fact that amphibians live a “double life”……

1. Aquatic larva stage

This refers to the fact that amphibians live a “double life”……

1. Aquatic larva stage

2. Terrestrial adult stage

Classification:Kingdom – Animalia

Kingdom – Animalia

Phylum – Chordata

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia (three living orders)

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Order – Anura

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Order – Anura (without tail)

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Order – Anura (without tail) Order – Caudata

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Order – Anura (without tail) Order – Caudata (tailed)

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Order – Anura (without tail) Order – Caudata (tailed) Order – Apoda

Kingdom – Animalia

Phylum – Chordata

Subphylum – Vertebrata

Class – Amphibia

Order – Anura (without tail) Order – Caudata (tailed) Order – Apoda (without legs)

There are three living orders of amphibians….

1. Anura (frogs and toads)

There are three living orders of amphibians….

1. Anura (frogs and toads)

There are three living orders of amphibians….

1. Anura (frogs and toads)

6,200 species

There are three living orders of amphibians….

1. Anura (frogs and toads)

6,200 species

Smallest is approximately ½ inch.

There are three living orders of amphibians….

1. Anura (frogs and toads)

6,200 species

Smallest is approximately ½ inch.

Largest is 16 inches and may weigh 8 pounds!

There are three living orders of amphibians….

2. Caudata (salamanders)

There are three living orders of amphibians….

2. Caudata (salamanders)

640 species

There are three living orders of amphibians….

2. Caudata (salamanders)

640 species

Smallest is about 2 inches.

There are three living orders of amphibians….

2. Caudata (salamanders)

640 species

Smallest is about 2 inches.

Largest is 5 feet and may weigh over 60 pounds.

There are three living orders of amphibians….

3. Apoda or Gymnophiona (caecilians)

There are three living orders of amphibians….

3. Apoda or Gymnophiona (caecilians)

Approximately 190 species

There are three living orders of amphibians….

3. Apoda or Gymnophiona (caecilians)

Approximately 190 species

Smallest species is approximately 6 inches.

There are three living orders of amphibians….

3. Apoda or Gymnophiona (caecilians)

Approximately 190 species

Smallest species is approximately 6 inches.

Largest species is approximately 4 feet.

Amphibian characteristics…..

Amphibian characteristics…..

1. Naked skin (no scales, feathers, or hair)

Amphibian characteristics…..

1. Naked skin (no scales, feathers, or hair)

2. Three chambered heart

Amphibian characteristics…..

1. Naked skin (no scales, feathers, or hair)

2. Three chambered heart

3. Usually a larval stage that is distinct from the adult stage

Amphibian characteristics…..

1. Naked skin (no scales, feathers, or hair)

2. Three chambered heart

3. Usually a larval stage that is distinct from the adult stage

4. Permeable skin through which they exchange most of their gases.

Amphibian characteristics…..

1. Naked skin (no scales, feathers, or hair)

2. Three chambered heart

3. Usually a larval stage that is distinct from the adult stage

4. Permeable skin through which they exchange most of their gases.

5. Ectothermic – Amphibians are “cold blooded”.

Amphibians have never been able to completely remove themselves from water or at least very moist environments.

Amphibians have never been able to completely remove themselves from water or at least very moist environments.

They must return to the water to reproduce.

Amphibians have never been able to completely remove themselves from water or at least very moist environments.

They must return to the water to reproduce.

They must keep their skin moist so they can exchange gases.

Amphibians occur on all continents except Antarctica.

Amphibians occur on all continents except Antarctica.

Frogs and Toads

• Australia

• North America

• South America

• Africa

• Europe

• Asia

Amphibians occur on all continents except Antarctica.

Frogs and Toads

• Australia

• North America

• South America

• Africa

• Europe

• Asia

Greatest species diversity is in tropical South America.

Amphibians occur on all continents except Antarctica.

Frogs and Toads

• Australia

• North America

• South America

• Africa

• Europe

• Asia

Greatest species diversity is in tropical South America.

Salamanders

• North America

• South America

• Europe

• Asia

Amphibians occur on all continents except Antarctica.

Frogs and Toads

• Australia

• North America

• South America

• Africa

• Europe

• Asia

Greatest species diversity is in tropical South America.

Salamanders

• North America

• South America

• Europe

• Asia

Greatest species diversity is in the southeastern U.S.

Amphibians occur on all continents except Antarctica.

Frogs and Toads

• Australia

• North America

• South America

• Africa

• Europe

• Asia

Greatest species diversity is in tropical South America.

Salamanders

• North America

• South America

• Europe

• Asia

Greatest species diversity is in the southeastern U.S.

Caecilians

• Only in the tropical zones of Asia, South America, and Africa.