Vertebrata The Fishes. Superclass Agnatha Jawless Fishes.
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Transcript of Vertebrata The Fishes. Superclass Agnatha Jawless Fishes.
VertebrataVertebrata
The FishesThe Fishes
Superclass AgnathaSuperclass Agnatha
Jawless FishesJawless Fishes
Superclass AgnathaSuperclass Agnatha
Class Myxini – hagfishesClass Myxini – hagfishes
Class Cephalaspidomorphi - lampreysClass Cephalaspidomorphi - lampreys
Class CephalaspidomorphiClass Cephalaspidomorphi
Suctorial mouth with horny teeth
Nasal sac not connected to pharynx
Seven pairs of gill pouches
Includes the lampreys
Life Cycle of the Sea LampreyLife Cycle of the Sea Lamprey
Lamprey feedingLamprey feeding
Superclass Superclass GnathostomataGnathostomata
Jawed FishesJawed Fishes
Types of Tail Fins among FishesTypes of Tail Fins among Fishes
Types of Scales among FishesTypes of Scales among Fishes
Chondrichthyes CharacteristicsChondrichthyes Characteristics
Heterocercal tail Cartilaginous skeleton Placoid scales Five to seven pairs of gills with separate
openings No operculum No swim bladder.
Includes the sharks, skates, rays, chimaeras.
External Anatomy of the SharkExternal Anatomy of the Shark
Sensory Structures of the HeadSensory Structures of the Head
Internal Anatomy of the SharkInternal Anatomy of the Shark
Shark DiversityShark Diversity
Group OsteichthyesGroup Osteichthyes
Bony FishesBony Fishes
OsteichthyesOsteichthyes Class Actinopterygii – ray-Class Actinopterygii – ray-
finned fishesfinned fishes Homocercal tailHomocercal tail Ganoid, cycloid and ctenoid Ganoid, cycloid and ctenoid
scalesscales Includes most bony fishesIncludes most bony fishes
Class Sarcopterygii – Class Sarcopterygii – lobe-finned fisheslobe-finned fishes
Diphycercal tailDiphycercal tail Dermal scalesDermal scales Mostly extinct but includes Mostly extinct but includes
lungfishes and the lungfishes and the coelacanthcoelacanth
Class ActinopterygiiClass Actinopterygii
Ray-finned FishesRay-finned Fishes
Actinopterygii CharacteristicsActinopterygii Characteristics
Fish primitively with fusiform body but variously modified
Bony skeleton Single gill opening on each side covered
with operculum Usually swim bladder present
Anatomy of the Bony FishAnatomy of the Bony Fish