Pikaia
The fossil remains of which creature were found in the Burgess Shale.
What is Pikaia?
About how many years ago did the first fish appear.
What is 500 mya?
In what period did the first jawed fish emerge.
What is Silurian Period?
The earliest known shark fossils are from which period?
The Silurian Period.
What is another Devonian fish that is larger than the sharks at the time.
What is Dunkleosteus?
How long was Pikaia.
What is 2 inches?
What were these first fish called.
What is Agnathans.
Which years to which years ago was the Silurian Period.
What is 443-419 mya?
Were sharks at the top of the food chain during the Devonian Period?
What is no?
What does acanthodians mean.
What is thorn or spike?
How many years old are the deposits of the Burgess Shale.
505 mya.
What does agnathans mean.
What is jawless?
What were the first jawed fish called.
What is acanthodians?
What did early sharks hunt?
What is squid, small fish, and crustaceans?
Which modern creatures are jawless.
What is lampreys and hagfish?
What modern creature is very similar to Pikaia.
What is Branchiostoma?
Around how many years ago were most jawless fish extinct by.
What is 360 mya?
What enabled acanthodians to become predators.
What is their jaws?
Which ancient shark was similar to today’s sharks.
What is Cladoselache?
What is the term for a stiffening rod, for example, there is one of these on Pikaia.
What is a notochord.
How did Pikaia swim.
What is a zigzag fashion?
What is Devonian Period?
Due to their jaws and teeth, acanthodians had an advantage over which group of animals.
What is jawless fish?
Which group do sharks belong to.
What is cartilaginous fish?
Which blunt-headed shark lived in the time of the dinosaurs.
What is Hybodus?