Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Class Sarcopterygii (coelacanths, lungfishes)• lobed fins• bony supports to tips of finsSUPERCLASS AGNATHAClass MyxiniOrder Myxiniformes (hagfishes)Class Cephalaspidomorphi Order Petromyzontiformes (lamprey)SUPERCLASS GNATHOSTOMATAClass Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii9 orders (sharks, rays, skates)Class Sarcopterygii Subclass CoelacanthimorphaOrder Coelacanthiformes (coelacanths) Subclass DipnoiOrder Ceratodontiformes (Australian lungfish)Order Lepidosireniformes (S. American, African lungfish)Class Actinopterygii - (rayfins, higher bony fishes) Subclass ChondrosteiOrder Polypteriformes (birchirs, reedfish)Order Acipenseriformes (sturgeons, paddlefishes) Subclass NeopterygiiOrder Semionotoformes (Lepisosteiformes) (gars)Order Amiiformes (bowfin) Division Teleostei35-38 orders (modern body fishes)SUPERCLASS GNATHOSTOMATAClass SarcopterygiiSubclass 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 watersLatimeria chalumnaeSUPERCLASS AGNATHAClass MyxiniOrder Myxiniformes (hagfishes)Class Cephalaspidomorphi Order Petromyzontiformes (lamprey)SUPERCLASS GNATHOSTOMATAClass Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii9 orders (sharks, rays, skates)Class Sarcopterygii Subclass CoelacanthimorphaOrder Coelacanthiformes (coelacanths) Subclass DipnoiOrder Ceratodontiformes (Australian lungfish)Order Lepidosireniformes (S. American, African lungfish)Class Actinopterygii - (rayfins, higher bony fishes) Subclass ChondrosteiOrder Polypteriformes (birchirs, reedfish)Order Acipenseriformes (sturgeons, paddlefishes) Subclass NeopterygiiOrder Semionotoformes (Lepisosteiformes) (gars)Order Amiiformes (bowfin) Division Teleostei35-38 orders (modern body fishes)SUPERCLASS GNATHOSTOMATAClass SarcopterygiiSubclass Dipnoi Order Ceratodontiformes (Australian lungfish)SUPERCLASS GNATHOSTOMATAClass SarcopterygiiSubclass Dipnoi Order Lepidosireniformes (African, S. Am. lungfish)Ceratodontiformes Lepidosireniformes(Australian) (S. American, African)body compressed cylindricalpectoral, pelvic fins flipper-like filamentousscales large smallgas bladder ("lung") unpaired pairedlarvae no external gills with external gillsadults do not aestivate aestivate in dry season (both) bladelike, crushing dermal ‘teeth’Class Actinopterygii •50 % of known fishes•rayed fins•swim bladderSUPERCLASS AGNATHAClass MyxiniOrder Myxiniformes (hagfishes)Class Cephalaspidomorphi Order Petromyzontiformes (lamprey)SUPERCLASS GNATHOSTOMATAClass Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii9 orders (sharks, rays, skates)Class Sarcopterygii Subclass CoelacanthimorphaOrder Coelacanthiformes (coelacanths) Subclass DipnoiOrder Ceratodontiformes (Australian lungfish)Order Lepidosireniformes (S. American, African lungfish)Class Actinopterygii - (rayfins, higher bony fishes) Subclass ChondrosteiOrder Polypteriformes (birchirs, reedfish)Order Acipenseriformes (sturgeons, paddlefishes) Subclass NeopterygiiOrder Semionotoformes (Lepisosteiformes) (gars)Order Amiiformes (bowfin) Division Teleostei35-38 orders (modern body fishes)Birchir (Polypterus weeksi)• ganoid scales and scutes• (abbreviate) heterocercal tail• skeleton largely cartilaginous• intestine with spiral value reedfish - pelvics absent; bichirs - pelvics presentAcipenseriformes – paddlefish, sturgeon• ganoid scales (and scutes)• heterocercal tail• skeleton largely cartilaginous• intestine with spiral valueSUPERCLASS AGNATHAClass MyxiniOrder Myxiniformes (hagfishes)Class Cephalaspidomorphi Order Petromyzontiformes (lamprey)SUPERCLASS GNATHOSTOMATAClass Chondrichthyes Subclass Holocephali Order Chimaeriformes (chimaeras) Subclass Elasmobranchii9 orders (sharks, rays, skates)Class Sarcopterygii Subclass CoelacanthimorphaOrder Coelacanthiformes (coelacanths) Subclass DipnoiOrder Ceratodontiformes (Australian lungfish)Order Lepidosireniformes (S. American, African lungfish)Class Actinopterygii - (rayfins, higher bony fishes) Subclass ChondrosteiOrder Polypteriformes (birchirs, reedfish)Order Acipenseriformes (sturgeons, paddlefishes) Subclass NeopterygiiOrder Semionotoformes (Lepisosteiformes) (gars)Order Amiiformes (bowfin) Division Teleostei35-38 orders (modern body fishes)Semionotiformes (Lepisosteiformes), Lepisosteidae• ganoid scales• abbreviated heterocercal tail• intestine with spiral valve • lung-like gas bladderlongnose gar (Lepisosteus osseus)Amiiformes, Amiidae• ganoid scales• abbreviated heterocercal tail• intestine with spiral value • lung-like gas bladderbowfin (Amia