Petromyzontidae, [426]

Petroscirtes, [709]

Phago, [576]

Phallusia, [72]

Phaneropleuron, [506], [519];

P. andersoni, [506]

Phanerosteon, [487]

Pharyngeal teeth, [251]

Pharyngodictyon, [87];

P. mirabile, [80]