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Class Sarcopterygii (coelacanths, lungfishes) lobed fins bony supports to tips of fins

Class Sarcopterygii (coelacanths, lungfishes) lobed fins bony supports to tips of fins. SUPERCLASS AGNATHA Class Myxini Order Myxiniformes (hagfishes) Class Cephalaspidomorphi Order Petromyzontiformes (lamprey) SUPERCLASS GNATHOSTOMATA Class Chondrichthyes

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Class Sarcopterygii (coelacanths, lungfishes) lobed fins bony supports to tips of fins

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  1. Class Sarcopterygii (coelacanths, lungfishes) • lobed fins • bony supports to tips of fins

  2. SUPERCLASS AGNATHA Class Myxini Order Myxiniformes (hagfishes) Class Cephalaspidomorphi Order Petromyzontiformes (lamprey) SUPERCLASS GNATHOSTOMATA Class Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii 9 orders (sharks, rays, skates) Class Sarcopterygii Subclass Coelacanthimorpha Order Coelacanthiformes (coelacanths) Subclass Dipnoi Order Ceratodontiformes (Australian lungfish) Order Lepidosireniformes (S. American, African lungfish) Class Actinopterygii - (rayfins, higher bony fishes) Subclass Chondrostei Order Polypteriformes (birchirs, reedfish) Order Acipenseriformes (sturgeons, paddlefishes) Subclass Neopterygii Order Semionotoformes (Lepisosteiformes) (gars) Order Amiiformes (bowfin) Division Teleostei 35-38 orders (modern body fishes)

  3. SUPERCLASS GNATHOSTOMATA Class Sarcopterygii Subclass Coelacanthimorpha Order Coelacanthiformes (coelacanths) • marine, deepwater species • spiral valve intestine • lobed fins homologous to tetrapod limbs • discovered in 1938 by Margaret Latimer • fossil forms in fresh, shallow waters Latimeria chalumnae

  4. SUPERCLASS AGNATHA Class Myxini Order Myxiniformes (hagfishes) Class Cephalaspidomorphi Order Petromyzontiformes (lamprey) SUPERCLASS GNATHOSTOMATA Class Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii 9 orders (sharks, rays, skates) Class Sarcopterygii Subclass Coelacanthimorpha Order Coelacanthiformes (coelacanths) Subclass Dipnoi Order Ceratodontiformes (Australian lungfish) Order Lepidosireniformes (S. American, African lungfish) Class Actinopterygii - (rayfins, higher bony fishes) Subclass Chondrostei Order Polypteriformes (birchirs, reedfish) Order Acipenseriformes (sturgeons, paddlefishes) Subclass Neopterygii Order Semionotoformes (Lepisosteiformes) (gars) Order Amiiformes (bowfin) Division Teleostei 35-38 orders (modern body fishes)

  5. SUPERCLASS GNATHOSTOMATA Class Sarcopterygii Subclass Dipnoi Order Ceratodontiformes (Australian lungfish)

  6. SUPERCLASS GNATHOSTOMATA Class Sarcopterygii Subclass Dipnoi Order Lepidosireniformes (African, S. Am. lungfish)

  7. CeratodontiformesLepidosireniformes (Australian) (S. American, African) body compressed cylindrical pectoral, pelvic fins flipper-like filamentous scales large small gas bladder ("lung") unpaired paired larvae no external gills with external gills adults do not aestivate aestivate in dry season (both) bladelike, crushing dermal ‘teeth’

  8. Class Actinopterygii • 50 % of known fishes • rayed fins • swim bladder

  9. SUPERCLASS AGNATHA Class Myxini Order Myxiniformes (hagfishes) Class Cephalaspidomorphi Order Petromyzontiformes (lamprey) SUPERCLASS GNATHOSTOMATA Class Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii 9 orders (sharks, rays, skates) Class Sarcopterygii Subclass Coelacanthimorpha Order Coelacanthiformes (coelacanths) Subclass Dipnoi Order Ceratodontiformes (Australian lungfish) Order Lepidosireniformes (S. American, African lungfish) Class Actinopterygii - (rayfins, higher bony fishes) Subclass Chondrostei Order Polypteriformes (birchirs, reedfish) Order Acipenseriformes (sturgeons, paddlefishes) Subclass Neopterygii Order Semionotoformes (Lepisosteiformes) (gars) Order Amiiformes (bowfin) Division Teleostei 35-38 orders (modern body fishes)

  10. Birchir (Polypterus weeksi) • ganoid scales and scutes • (abbreviate) heterocercal tail • skeleton largely cartilaginous • intestine with spiral value reedfish - pelvics absent; bichirs - pelvics present

  11. Acipenseriformes – paddlefish, sturgeon • ganoid scales (and scutes) • heterocercal tail • skeleton largely cartilaginous • intestine with spiral value

  12. SUPERCLASS AGNATHA Class Myxini Order Myxiniformes (hagfishes) Class Cephalaspidomorphi Order Petromyzontiformes (lamprey) SUPERCLASS GNATHOSTOMATA Class Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii 9 orders (sharks, rays, skates) Class Sarcopterygii Subclass Coelacanthimorpha Order Coelacanthiformes (coelacanths) Subclass Dipnoi Order Ceratodontiformes (Australian lungfish) Order Lepidosireniformes (S. American, African lungfish) Class Actinopterygii - (rayfins, higher bony fishes) Subclass Chondrostei Order Polypteriformes (birchirs, reedfish) Order Acipenseriformes (sturgeons, paddlefishes) Subclass Neopterygii Order Semionotoformes (Lepisosteiformes) (gars) Order Amiiformes (bowfin) Division Teleostei 35-38 orders (modern body fishes)

  13. Semionotiformes (Lepisosteiformes), Lepisosteidae • ganoid scales • abbreviated heterocercal tail • intestine with spiral valve • lung-like gas bladder longnose gar (Lepisosteus osseus)

  14. Amiiformes, Amiidae • ganoid scales • abbreviated heterocercal tail • intestine with spiral value • lung-like gas bladder bowfin (Amia calva)

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