Jawless fish
What are the ONLY two jawless fish alive?
Hagfish & Lamprey
Sarcopterygians are also known as what? (Hint: something to do with their fins)
Lobe-finned fish
Gnathostomata are ______ vertebrate?
Jawed
Jawless fish don't have what?
Jaws
True or False
Cartilaginous are vertebrates?
True
Lamprey have been thought as ______ benefiting in the great lakes in 1940.
About how long ago did the sarcopterygians appear? (in hundreds of millions of years)
400 million years
Gnathostomata are classified ___ times.
3
Placodermi fossils are _____ fish that we've known from fossils.
jawed
Are all fish vertebrates?
True or False
True
Hagfish don't have a cerebrum and a _____, as well as no stomach or jaw.
cerebellum
How many species of Coelacanths are there?
2
Gnathostomata originated in the _____ Period.
Ordovician
How many types types of fish are jawless?
2 lamprey and hagfish
What makes a fish a vertebrate?
Having a backbone
What time period did all jawless fish but hagfish and lamprey go extinct?
Cambrian
How many of the seven families of Lungfish actually survived through the Triassic?
Only 2 families
There are _______ species of gnathostomata.
60,000
Acanthodians are signs of early stages of what?
jawed vertebrate
True or False
Not all fish have skulls
False
How long can Hagfish go without eating?
7 months
Which genra of lungfish is the longest of the three?
(The three genra's are Neoceratodus, Lepidosiren, and Protopterus)
Neoceratodus/Austrailian fish
Gnathostomata and there 60,000 species are _____ of all living vertebrate
99%
Ostracoderms Jaws are _____ and ______
armored and jawless
What are the two materials fish backbones and skulls are made of?