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Questions and Answers
What is the order name for the group of tailless amphibians?
What is the order name for the group of tailless amphibians?
- Gymnophiona
- Apoda
- Caudata
- Anura (correct)
Where is the oldest fossil 'proto-frog' Triadobatrachus known from?
Where is the oldest fossil 'proto-frog' Triadobatrachus known from?
- Early Jurassic of Australia
- Late Triassic of North America
- Late Jurassic of South America
- Early Triassic of Madagascar (correct)
What percentage of extant amphibian species do frogs account for?
What percentage of extant amphibian species do frogs account for?
- 88% (correct)
- 50%
- 60%
- 75%
What is the distinction between frogs and toads based on?
What is the distinction between frogs and toads based on?
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What is the estimated time of the split of frogs from other amphibians according to molecular clock dating?
What is the estimated time of the split of frogs from other amphibians according to molecular clock dating?
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Study Notes
Anuran Order
- The order name for the group of tailless amphibians is Anura.
Oldest Fossil Record
- The oldest fossil 'proto-frog' Triadobatrachus is known from Madagascar.
Frog Species
- Frogs account for approximately 88% of extant amphibian species.
Frogs vs Toads
- The distinction between frogs and toads is based on their body shape and habits, rather than being a formal taxonomic classification.
Evolutionary History
- According to molecular clock dating, the estimated time of the split of frogs from other amphibians dates back to around 300 million years ago.
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