Anisoceras, about 20-60 cm long, Middle Cretaceous

Cylindroteuthis puzosiana, up to 30 cm long, Middle Jurassic

Scaphites, about 5-20 cm across, Middle to Late Cretaceous

Fossil Cephalopod Reconstructions

My PhD thesis was on heteromorph ammonites, and these are drawings taken from that thesis as well as various scientific publications and seminars.

Click on the images to see larger versions. Please note that they are © Neale Monks are not to be used elsewhere without permission. If you want to use them on a non-profit or educational web site, please get in touch.

News for 2009!

Following some discussions about ammonite morphology, Chris Taylor has produced a lovely little pewter keychain ornament in the form of an ammonite. See my Ammonite Keychain page for more.

Hamites, about 10-40 cm long, Middle Cretaceous

Hamites (Planohamites), about 15 cm across, Middle Cretaceous

Spirula, about 10 cm long, still alive today, and perhaps a good clue to heteromorph ammonite ecology