A. Class Acanthodii

B. Class Placodermi

A. visceral skeleton

B. somatic skeleton

C. dermal skeleton

A. Origin of jaws

B. Jaw suspension

i. Amphistylic jaw suspension

i. Hyostylic jaw suspension

i. Autostylic jaw suspension

C. Advantages of jaws

Readings:

Chapter 6: pages 176-182; Chapter 7: pages 184-189

gnathostome

Acanthodii, Placodermi, Chondrichthyes

ganoid scales

mandibular arch, hyoid arch, hyomandibular cartilage

epibranchial cartilage, ceratobranchial cartilage

palatopterygoquadrate, Meckel's cartilage

jaw suspension: amphistylic, hyostylic, autostylic

spiracle