12 Nov 20. Introduction to the headbones . Mon 15 Nov 21. Evo devo of the braincase and dermal head skeleton .
Jaws make ears make room for a big brain.
98Lecture 24, Gould . PJH p. 566-569. A. Dunno . Paired fins seem to an apomorphy within early vertebrates. Every gnathostome group has both pectoral and pelvic pairs of fins, and we may readily consider the paired fins to be a gnathostome synapomorphy, like jaws.