Nautiloids – jet-propelled predators

(nor-til-oids)

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Model of a nautiloid cephalopod.
Image: Benjamin Healley
Source: Museum Victoria

Fossil of the nautiloid cephalopod, Endoceras wahlenbergi.
Image: Benjamin Healley
Source: Museum Victoria

Silurian

HOW BIG IT WAS

Nautiloids relative size depiction as described below
Endoceras was 45–50 cm long.

The oceans were home to a new type of predator – fast-swimming, jet-propelled molluscs called cephalopods, with keen senses and a cluster of grasping tentacles. The first cephalopods like Endoceras had cone-shaped shells. Later cephalopods had shells that were coiled or became enclosed within the body. This last group were the ancestors of modern squids, cuttlefishes and octopuses.

A TRAIL THROUGH TIME

Cephalopods first appeared in the Silurian and survive to this day. See how this group has changed over time.

Ptenoceras GoniatitesParalegocerasCladiscitesBelemnitesBostrychoceras

WHERE IT WAS FOUND

Nautiloids map

This fossil of Endoceras wahlenbergi was discovered in Sweden.

RELATED OBJECTS

Other objects from the Silurian

BaragwanathiaEurypteridsPeriechocrinus Kalbarria

Related Resources

MV Resources

Photograph of a yellow plastic Tyranasaurus Rex