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Lancelets
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Cephalochordata
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Tunicates
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Urochordata
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jawed cartilaginous fishes
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sharks and stingrays
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vertebrates with a jaw
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like sharks!
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sarcopterygians with limbs
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Need:
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4 limbs with digits
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neck for seperate movement of head
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fusion of pelvic girdle to backbone
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ears for airborne sounds
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Ornithischia
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bird hipped, herbivores
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Saurischia
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lizard hipped
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herbivores- sauropods
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carnivores- theropods
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birds
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Aves
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birds
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forelimbs into wings
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keratinized feathers
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hollow skeletons
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no teeth
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chordates with a head
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Have:
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skull, brain, eyes and other sense organs, high metabolism
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Example:
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Hagfishes
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Myxini
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derived characters:
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scales for waterproof
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shelled eggs on land
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lepidosaurs
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lizards and snakes
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archosaurs
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crocodillians, dinos, bird, turtles
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craniates with a backbone
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have vertebrae
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Example:
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Lampreys
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petromyzontida
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gnathostomes with bony endoskeletons
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bony fishes!!
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actinopterygii
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ray-finned fishes
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yellowfin tuna, seahorse
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lobe-finned fishes
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Lungfish
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an ancient sarcopterygian and tetrapod
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simple eggs with the embryo surrounded by a jelly coat
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amniotes
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tetrapods with amniotic eggs
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mammals
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amniotes with hair
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derived characters:
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mammary glands
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hair
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high metabolic rate
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endothermy
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large brain
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different teeth
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main groups
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Monotremes
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platypus, BASAL MAMMAL TAXA, still lay eggs
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Marsupials
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dont lay eggs, embryo connected to placenta then to pouch.. kangaroos!
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Eutherians
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most mammals
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Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
