Chapter 5 Part 2 Flashcards
Tetrapods (4 limbed)-Superclass Tetrapoda includes
amphibians, birds, mammals, reptiles
Characteristics of Tetrapoda
Vertebrae, Lungs, Paired appendages, Jaws, Chiridia (muscular limbs w/defined joints/digits)
Primitive Tetrapod Examples are
Acanthostega and Temnospondyli
Acanthostega: lateral line system, tail fins w/rays, intercranial joints and…
dermal skull bones, limbs w/digits, weight bearing girdles
Temnospondyli are large group of early amphibians-diverse…
habitats, every continent
What Class are Modern Amphibians-
Class Amphibia
Subclass of Amphibians:
Lissamphibia
Characteristics of Lissamphibia:
Anamniotes
Use cutaneous respiration
extra ear bone
Metamorphosis
3 Groups of Lissamphibia:
frogs, salamanders, caecilians
Modern Amphibians have 3 groups ( Orders)
Anura (without tail), Urodela (visible tail), Gymnophiona (naked, snake-like)
Anura examples:
frogs, toads; tympanum
Urodela examples:
salamanders; no tympanum
Gymnophiona examples:
caecilian; burrowing
Amniotes-
embryos have extraembryonic membranes within shell
Amniotes are classified by
number of holes on side of skull behind eye orbit