Subclasses of Amphibia Flashcards
What is the subclass with caecilians?
Apoda
What does Apoda mean?
without foot
What is the subclass with salamanders & newts?
Urodela
What are the characteristics of Apoda
-wormlike body
-many vertebrae w/ long ribs
-limbless
-terminal anus
-males have protrusible copulatory organ
-viviparous or oviparous
What does Urodela mean?
tail evident
What is the subclass with frogs and toads?
Anura
What organism is in the subclass Apoda
caecilians
What are the characteristics of Urodela
-body w/ head, trunk, and long tail
-no scales
-two pairs of equal limbs
-direct development among terrestrial species
What organisms are in Urodela?
Salamanders and Newts
What organisms are in Anura?
frogs and toads
What are characteristics of Anura?
-head & trunk fused
-no tail or scales
-two pairs of limb
-hind limbs elongated
-large mouth
-lungs
-tadpole larva stage
What does Anura mean?
without tail
