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Agnathans are…
jawless fishes
(ex. lampreys, hagfish)

Gnathostomes are…
jawed vertebrates


Pteraspidiformes
(A) Arandaspis
(B) Pteraspis

Furcacaudiformes (“forktail”)

Thelodontiformes (“nipple teeth”, “hollow scales”, or coelolepids)

Conodonta (“cone teeth”)

Sea squirt / tunicate
Phylum: Chordata
Subphylum: Urochordata

Lancelet
Phylum: Chordata
Subphylum: Cephalochordata
Order: Amphioxiformes

Hagfish
Phylum: Chordata
Subphylum: Craniata
Infraphylum: Myxinomorphi
Class: Myxini
Order: Myxiniformes
Family: Myxinidae

Lamprey
Phylum: Chordata
Subphylum: Craniata
Infraphylum: Vertebrata
Superclass: Pteromyzontomorphi
Class: Petromyzontida
Order: Petromyzontiformes
Family: Petromyzontidae

Placoderm (“plate skinned”)
The class Chondrichthyes includes all cartilaginous fishes, such as…
sharks, rays, skates, and chimaeras

The infraclass Elasmobranchii includes all…
sharks and rays


Whale shark (rasp tooth)
Order: Orectolobiformes
Family: Rhincodontidae

Nurse shark (hinge mouth)
Order: Orectolobiformes
Family: Ginglymostomatidae

Sand tiger shark (ragged tooth)
Order: Lamniformes
Family: Odontaspididae

Thresher shark (fox shark)
Order: Lamniformes
Family: Alopiidae

Mackerel shark (white shark / serrated / sharp tooth)
Order: Lamniformes
Family: Lamnidae
(Note: Includes many species. Salmon, mako, and great white are all in here.)

Hammerhead shark
Order: Carcharhiniformes
Family: Sphyrnidae

Bull shark (requiem shark)
Order: Carcharhiniformes
Family: Carcharhinidae

Dogfish shark
Order: Squaliformes
Family: Squalidae

Skates
Order: Rajiformes
Family: Rajidae

Eagle ray
Order: Myliobatiformes
Family: Myliobatidae

Manta ray
Order: Myliobatiformes
Family: Myliobatidae

Stingray
Order: Myliobatiformes
Family: Dasyatidae

Cownose ray
Order: Myliobatiformes
Family: Rhinopteridae

Chimaera
Order: Chimeraformes
The subclass Sarcopterygii (lobe-finned fish and relatives) includes which seven infraclasses?
Actinistia (coelacanths)
Dipnomorpha
Tetrapoda
Onychodontida (extinct)
Rhizondontida (extinct)
Osteolepidida (extinct)
Elpistostegalia (extinct)
Class Osteichthyes includes…
all bony fishes and tetrapod descendants

Coelacanth
Subclass: Sarcopterygii
Infraclass: Actinistia
(Coelocanthimorpha)

Lungfish (dipnoans)
Subclass: Sarcopterygii
Infraclass: Dipnomorpha
Order: Ceratodontiformes

Bichir
Subclass: Actinopterygii
Infraclass: Cladistia
Order: Polypteriformes

Paddlefish
Subclass: Actinopterygii
Infraclass: Chondrostei
Order: Acipenseriformes
Family: Polyodontidae

Sturgeon
Subclass: Actinopterygii
Infraclass: Chondrostei
Order: Acipenseriformes
Family: Acipenseridae

Gar
Subclass: Actinopterygii
Infraclass: Holostei
Order: Lepisosteiformes

Bowfin
Subclass: Actinopterygii
Infraclass: Holostei
Order: Amiiformes

Bonefish
Division: Teleostei
Cohort: Elopomorpha
Order: Albuliformes

Tarpon
Division: Teleostei
Cohort: Elopomorpha
Order: Elopiformes
Family: Megalopidae

Ladyfish
Division: Teleostei
Cohort: Elopomorpha
Order: Elopiformes
Family: Elopidae

True eels
Division: Teleostei
Cohort: Elopomorpha
Order: Anguiliiformes
Family: Anguillidae

Snake eels
Division: Teleostei
Cohort: Elopomorpha
Order: Anguilliformes
Family: Ophichthidae

Moray eels
Division: Teleostei
Cohort: Elopomorpha
Order: Anguilliformes
Family: Muraenidae

Gulper eels (pelican eels)
Division: Teleostei
Cohort: Elopomorpha
Order: Anguilliformes
Family: Eurypharyngidae

Bony tongues (arowanas and arapaima)
Division: Teleostei
Cohort / Superorder: Osteoglossomorpha
Order: Osteoglossiformes

Mooneyes
Division: Teleostei
Cohort / Superorder: Osteoglossomorpha
Order: Hiodontiformes
Family: Hiodontidae

Herrings
Division: Teleostei
Superorder: Culpeomorpha
Order: Clupeiformes
Family: Clupeidae

Anchovies
Division: Teleostei
Superorder: Culpeomorpha
Order: Clupeiformes
Family: Engraulidae

Slickheads
Division: Teleostei
Order: Alepocephaliformes

Minnows, shiners, carps, and chubs
Superorder: Ostariophysi
Order: Cypriniformes
Family: Cyprinidae

Tetras, piranhas, and hatchetfish
Superorder: Ostariophysi
Order: Characiformes

Freshwater catfish
Superorder: Ostariophysi
Order: Siluriformes
Family: Ictaluridae

Marine catfish
Superorder: Ostariophysi
Order: Siluriformes
Family: Ariidae

Trout, salmon, and whitefish
Class: Actinopterygii
Division: Teleostei
Superorder: Protacanthopterygii
Order: Salmoniformes
Family: Salmonidae

Pikes, pickerels, and mudminnows
Cohort: Euteleostei
Superorder: Protacanthopterygii
Order: Esociformes

Smelts
Class: Actinopterygii
Cohort: Euteleostei
Superorder: Protacanthopterygii
Order: Osmeriformes

Barreleyes
Class: Actinopterygii
Cohort: Euteleostei
Superorder: Protacanthopterygii
Order: Argentiniformes

Bristlemouths, hatchetfish, and light fish
Cohort: Euteleostei
Superorder: Protacanthopterygii
Order: Stomiiformes

Lizardfish
Cohort: Neoteleostei
Superorder: Cyclosquamata
Order: Aulopiformes
Family: Synodontidae

Lanternfish
Cohort: Neoteleostei
Superorder: Scopelomorpha
Order: Myctophiformes
Family: Myctophidae

Opahs and oarfish
Cohort: Neoteleostei
Superorder: Lampriomorpha
Order: Lampriformes

Pirate perch
Cohort: Neoteleostei
Superorder: Paracanthopterygii
Order: Percopsiformes
Family: Aphredoderidae

Troutperches, cods, toadfishes, anglerfishes
Cohort: Neoteleostei
Superorder: Paracanthopterygii
Order: Percopsiformes