Cyclic weather and drying conditions predominated late Devonian so less habitat for fish. (Also, abundant prey on shore and escape from marine predators).
1 of 10
What was the Subclass that the early amphibians were in?
Labyrinthodonts.
2 of 10
Name the 3 orders of the modern amphibians.
Order Urodela, Order Anura, Order Apoda
3 of 10
What does Order Urodela mean and what is found here? How many species?
"tailed ones". Newts and Salamanders. 400 species.
4 of 10
"Tail-less ones" like frogs and toads are found in what order? How many species?
Order Anura. 3500 species.
5 of 10
What does Order Apoda mean and what is found here? How many species?
"legless ones". Caecilians. 150 species.
6 of 10
Some species from order Urodela are paedomorphic. What does this mean and what is the name of the process?
development slows down and sexual maturity is reached in the larval stage. This is neoteny.
7 of 10
Give an example of a neotenous species?
some tiger salamanders remain aquatic and don't lose their gills. This reproductive larval form is called an axolotl.
8 of 10
200 frog species have gone extinct since 1970s. There are high rates of deformity in places. Why?
habitat loss + fragmentation. Introduced predators. Toxic contaminants.
9 of 10
Some frog species declines also occur in pristine habitats. Why?
Disease (chytrid fungus). UV radiation from climate change.
10 of 10
Other cards in this set
Card 2
Front
What was the Subclass that the early amphibians were in?
Back
Labyrinthodonts.
Card 3
Front
Name the 3 orders of the modern amphibians.
Back
Card 4
Front
What does Order Urodela mean and what is found here? How many species?
Back
Card 5
Front
"Tail-less ones" like frogs and toads are found in what order? How many species?
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