6-HOF2 - History of Fishes 2 Jaws Click to edit Master subtitle style Lecture 6\/14\/10 8 11 DOF Ch 9 Few surviving jawless fishes Origin of Jaws

6-HOF2 - History of Fishes 2 Jaws Click to edit Master...

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Click to edit Master subtitle style 9/14/10 History of Fishes 2: Jaws Lecture 6: Ch. 8; 11 DOF
9/14/10 Few surviving jawless fishes
9/14/10 Origin of Jaws: Modification of gill
9/14/10 Evolution of Gill arches expand with the loss of first two or three anterior arches First arch moved forward and became the upper and lower jaws Second gill arch became hyomandibular providing support for jaws
9/14/10 gut cranium mouth Evolution of the jaw Primitive jawless stage gill slits visceral cartilages 8-9 arches
9/14/10 Stylized Gnathostome jaw Palatoquadrate Meckel’s cartilage Mandibular Arch
9/14/10 Palatoquadrate Meckel’s cartilage Mandibular Arch Hyomandibular Ceratohyal Hyoid Arch spira cle Stylized Gnathostome
9/14/10 Diversity of Prey Items; Limitless
9/14/10 Diversity of Jaws
9/14/10 Why are they good? Gnathostomes versus Jawless Fishes
9/14/10 What would the advantage be to having Think about it, write it down, share with a neighbor…
9/14/10
9/14/10 Greater Feeding Efficiency with Jaws? Greater bite force?

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