Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Lecture 13 Wrld Dnsr

Horn-heads and dome-heads

QuestionAnswer
Marginocephalians belong to what group? Ornithiscians
What 2 groups are the marginocephalians split into? Pachycephalsauria (dome, bone-headed) & Ceratopsia (horned)
Early characteristics of the marginocephalians? small-bodied and bipedial
What does "marginocephalian" mean? margin-headed
Which of the two groups of marginocephalia are from the cretaceous of Europe, Asia, and N. America? Also they are found sparsely IF found. Pachycephalosaurus
Other group: Very successful, found in abundant remains in the late cretaceous of N. America and Asia Ceratopsians
Pachycephalosaurs Anatomy: (mr. burns dinosaur) Thickened skull domes (thickened frontals and parietals), bipedal, leaf-shaped/serrated teeth
Ceratopsians anatomy: Frill (made from parietals and squamosal bones), horns
Who is the oldest ceratopsian? Yinlong
Which ceratopsian is small-bodied, bipedal, and nicknamed the "parrot-lizard"? Psittacosaurs
Group of mid-sized ceratopsians who are thought to be bipedal while others of this same group were quadrupedal? Protoceratopsids
Compare protoceratopsids to psittacosaurs protoceratopsids possess longer frills but were shorter. Some had a nasal bump (not a horn). Teeth were more advanced.
Were all ceratopsids considered bipedal? No, they were all quadrupedal.
What kind of teeth system did ceratopsids possess? Complex dental batteries (continuous surface of teeth that were placed in rows so teeth were present when the new were replacing the old.)
What hypotheses have been made about the dome head of the pachycephalosaur? Head-butting, flank butting, sexual or intraspecific display
What has been found in ceratopsians for processing food? Gastrolith, or a gizzard
What has there been much controversy about as far as the ceratopsian's movement? Posture and gait of ceratopsids
What hypotheses have been made about ceratopsian horns and frills? Expanded surface for attachment of large jaw muscles, protection, thermoregulation. The strongest being that the frill is used for display.
What indicates that ceratopsids traveled in herds? Large quantities of ceratopsids in one bonebed.
Created by: Chelseagirl2508
Popular History sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards