MARGINOCEPHALIA Flashcards by Marissa O | Brainscape

Q

Ceratopsian characteristics (5)

A

rostral bone (snout)

narrow beak w/ flaring jugals

FRILL

vaulted palates in front of mouth

dental battery

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Q

psittacosaurus

A

primitive ceratopsian

falcultative biped

small frill

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Q

Neoceratopsian characteristics (3)

A

extremely large head

broad, prominent frill

pointed, sharply keeled rostrum

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Q

Protoceratops

A

“fighting dinosaur”

big difference in M/F

larger, taller frills and pronounced bump on snout

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Q

Ceratopsid characteristics (4)

A

v large skulls

large nostrils

prominent frills

variety of horns

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Q

Pachyrhinosaurinae

A

relatively short, high face

short frill

long nasal horn

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Q

Ceratopsinae

A

long, low faces

long frill

tall post orbital horn

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Q

Triceratops

A

complex dental battery

columns of teeth in interlocking rows

convergent evolution with hadrosaurs (dental battery)

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Q

Frill and Horn functions

A

thermoregulation

attach to jaw for grinding

display (sexual dimorphism, species recognition)

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Q

Pachycephalosaurs

A

“thick headed lizards”

bipedal

Late Cretaceous

SMALL INDIVIDUAL TEETH

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Q

ontogomorph

A

change drastically to become adult

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