two hundred m.[139] The way of shell coiling would confirm to become crucial to the longer term good results from the lineages; endogastric coiling would more only allow huge size being attained using a straight shell, Whilst exogastric coiling originally rather

The mid-Ordovician saw the main cephalopods with septa potent plenty of to cope With all the pressures related to further drinking water, and could inhabit depths bigger than one hundred200 m.[139] The path of shell coiling would prove to generally be important to the long run success with the lineages; endogastric coiling would only permit signif