Dentition Flashcards
What organisms have heterodont dentition?
Mammals
What organisms have homodont dentition?
Lower vertebrates
E.x. Alligator
What is thecodont?
Teeth set in sockets
E.x. Crocodiles, extinct birds, mammals
What is pleurodont?
Teeth attached to inner surface of jaws
E.x. Anurans, urodeles, many lizards
What is acrodont?
Teeth attached loosely to the top of the jaw
E.x. Many fishes, snakes
What is the jaw articulation of a reptile (crocodile, turtle)?
Between the quad rate and articular
What is the jaw articulation of an osteicthyan (bowfin)?
Between the quadrate and articular
What is the jaw articulation of an amphibian (frog)?
Between quadrate and articular
What is the jaw articulation of a chondrichthyan (modern shark)?
Between palatoquadrste and meckels cartilage
what kind of jaw suspension do chondrichthyans have?
hyostyly
what kind of jaw suspension do mammals have?
craniostyly
what kind of jaw suspension do teleosts (bowfin) have?
modified hyostyly
what kind of jaw suspension do amphibians, reptiles, and birds have?
metautostyly
what is the homologous structure of the palatoquadrate in bony fish, amphibians, reptiles, birds, and mammals?
quadrate
incus in mammals
what is the homologous structure of the meckels cartilage in bony fish, amphibians, reptiles, birds, and mammals?
articular
malleus in mammals
