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19 Cards in this Set
- Front
- Back
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Phylum Hemichordata
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Have 1/2 of the features of Chordates: Pharyngeal pouches & notochords
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Phylum Cordata
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Notochord, pharyngeal pouches, endostyle, post-anal tail
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Subphylum Urochordata
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Tunicates, sea squirts
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Subphylum Cephalochordata
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Lancelets
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Subphylum Vertebrata
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Vertabrates
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Superclass Agnatha
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Jawless fish
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Class Myxini
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Hagfishes
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Class Petromyzontida
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Lampreys
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Superclass Gnathostomata
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Jawed Fish
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Class Chondrichthyes
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Cartilaginous fishes-->Placoid scales
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Class Actinopterygii
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Ray-finned fishes--> have Ctenoid or Cycloid scales
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Class Sarcopterygii
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Lobe-finned fishes
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Ganoid scales
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Found in early bony fish
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Ctenoid scales
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Found in some Teleosts
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Cycloid scales
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Found in some Teleosts
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Placoid scales
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Found in Chondrichthyes
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What is the operculum?
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meaning little lid, is a corneous or calcareous anatomical structure like a trapdoor which exists in many (but not all) groups of sea snails and freshwater snails
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What is the swim bladder?
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an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming--> Turns into human lungs
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What are the pectoral and pelvic girdles?
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The set of bones which connects the upper and lower limbs to the axial skeleton on each side
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