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Biology 421 - Comparative anatomy > Dentition > Flashcards

Dentition Flashcards

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1
Q

What organisms have heterodont dentition?

A

Mammals

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2
Q

What organisms have homodont dentition?

A

Lower vertebrates
E.x. Alligator

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3
Q

What is thecodont?

A

Teeth set in sockets
E.x. Crocodiles, extinct birds, mammals

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4
Q

What is pleurodont?

A

Teeth attached to inner surface of jaws
E.x. Anurans, urodeles, many lizards

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5
Q

What is acrodont?

A

Teeth attached loosely to the top of the jaw
E.x. Many fishes, snakes

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6
Q

What is the jaw articulation of a reptile (crocodile, turtle)?

A

Between the quad rate and articular

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7
Q

What is the jaw articulation of an osteicthyan (bowfin)?

A

Between the quadrate and articular

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8
Q

What is the jaw articulation of an amphibian (frog)?

A

Between quadrate and articular

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9
Q

What is the jaw articulation of a chondrichthyan (modern shark)?

A

Between palatoquadrste and meckels cartilage

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10
Q

what kind of jaw suspension do chondrichthyans have?

A

hyostyly

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11
Q

what kind of jaw suspension do mammals have?

A

craniostyly

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12
Q

what kind of jaw suspension do teleosts (bowfin) have?

A

modified hyostyly

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13
Q

what kind of jaw suspension do amphibians, reptiles, and birds have?

A

metautostyly

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14
Q

what is the homologous structure of the palatoquadrate in bony fish, amphibians, reptiles, birds, and mammals?

A

quadrate
incus in mammals

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15
Q

what is the homologous structure of the meckels cartilage in bony fish, amphibians, reptiles, birds, and mammals?

A

articular
malleus in mammals

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16
Q

what is the homologous structure of the hyomandibular cartilage in bony fish, amphibians, reptiles, birds, and mammals?

A

hyomandibula bone in bony fish
columella/stapes

17
Q

what is the homologous structure of the first and second branchial arches in mammals?

A

hyoid

18
Q

what is the homologous structure of the second and third branchial arches in mammals?

A

larynx

Biology 421 - Comparative anatomy (25 decks)

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