The mid-Ordovician observed the first cephalopods with septa powerful plenty of to cope Together with the pressures connected to deeper water, and could inhabit depths greater than 100200 m.[139] The way of shell coiling would confirm being important to the ?????? long run accomplishment in the lineages; endogastric coiling would only permit large

two hundred m.[139] The way of shell coiling would confirm to become important to the future achievements in more the lineages; endogastric coiling would only allow huge sizing for being attained with a straight shell, While exogastric coiling in the beginning fairly