Nautilus
The order of Nautilida belongs to the class of inkfish like animals (Cephalopoda) and the phylum Mollusca. The nautilus is an inkfish like animal. The "sipho" (tube which connect the chambers) is centered in the middle of the chambers. The animal can go up and down in the water column by regulating the amount of water in the chambers.
The "suture lines" are less developed than in ammonites  . They occur in sediments from the end of the Cambrian period until recent. The nautilus still lives in the ocean waters near Madagascar.
Example of a recent Nautilus.
Example of a fossil Nautilus.
Description of the suturelines occurring in goniatites, ceratites and ammonites. |
