Cva1 Gnathostomes

Front 1

gnathostomes common names

Back 1

jaw mouth

Front 2

early jaw fish have which 2 sets of paired fins

Back 2

pelvic fins and pectoral fins

Front 3

placoderms common name

Back 3

plate skin

Front 4

which time periods were placoderms present?

Back 4

Silurian to Devonian

Front 5

syncharchual bone

Back 5

fused neural and hemal arches
-allows for independent movement of head from body

Front 6

which group first shows a syncharchual bone

Back 6

placoderms

Front 7

dorsolaterally compressed

Back 7

flat
-some placoderms

Front 8

condrichthyes common name

Back 8

cartilage fish

Front 9

two groups within condrichthyes

Back 9

elasmobranchs, holocephali

Front 10

2 bone components in condruchthyes

Back 10

placoid scales and teeth

Front 11

elasmobranchs common name

Back 11

sharks and rays

Front 12

holocephali common name

Back 12

chimeras

Front 13

operculum

Back 13

flap that covers and protects gills
-in holocephali, but not bony

Front 14

acanthodians common name

Back 14

spiny form

Front 15

acanthodians defining feature

Back 15

large spines on leading edge of fins

Front 16

____ have replaceable teeth, while ____ have teeth, but they're not replaced and have no enamel.

Back 16

holocephali (sharks), acanthodians

Front 17

_____ has bony operculum, while ____ has an operculum, but it's not bony.

Back 17

acanthodians, holocephali (sharks)

Front 18

osteichthyes common name

Back 18

bone fish

Front 19

most diverse groups of vertebrae

Back 19

osteichthyes

Front 20

what does the swim bladder function for

Back 20

buoyancy

Front 21

2 groups within osteichthyes

Back 21

actinoptergians, sarcopterygians

Front 22

two groups within actinoptergians

Back 22

palaeonisciformes, neopterygii

Front 23

lepidotrichia

Back 23

supports thin, moveable fin rays

Front 24

lepidotrichia were first seen in which group

Back 24

osteichthyes

Front 25

actinopterogians common name

Back 25

ray-finned fish

Front 26

actinoptergians are under which larger group

Back 26

osteichthyes

Front 27

examples of palaneonisciformes

Back 27

paddlefish, sturgeons

Front 28

ganoid scales

Back 28

ganoine presentin scale (like a thick layer of enamel)

Front 29

ganoid scales are seen in which group

Back 29

palaeonisciformes (paddlefish)

Front 30

heterocercal tail

Back 30

uneven lobes

Front 31

heterocercal tail in which group

Back 31

palaeonisciformes

Front 32

which group includes most extant fishes and teleosts?

Back 32

neopterygians

Front 33

2 groups of extant fish

Back 33

teleosts and holosteans

Front 34

2 representatives of holosteans

Back 34

gars and bowfish

Front 35

cycloid or tenoid scales are found in which group

Back 35

neopterygians (teleosts)
-they are reduced

Front 36

sarcoptergians common name

Back 36

lobed-fin fish

Front 37

cosmoid scales

Back 37

contain cosmine (which is dentin-like)
-sarcopterygians

Front 38

diphycercal tail

Back 38

vertebral column extends straight back into tail and divides equal lobes

Front 39

extant sarcopterygian groups (3)

Back 39

actinistia, diphoi (lung fish), rhipidistians

Front 40

which group is thought to have given rise to tetrapods (during which era)

Back 40

rhipidistians
-Devonian

Front 41

3 groups within the rhipidistians

Back 41

evsthenopteron, panderichthyes, tiktaalik

Front 42

crainal kinesis

Back 42

hinge-like joint at middle of the braincase, gives jaw more movement

Front 43

labryithodont teeth

Back 43

have lots of folding that increase surface area of enamel and dentin
-very strong

Front 44

labryinthodont teeth are seen in which group?

Back 44

rhipsidians

-acanthostega and lepospondyls