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The mid-Ordovician saw the main cephalopods with septa solid ample to cope While using the pressures connected to deeper h2o, and could inhabit depths bigger than one hundred200 m.[139] The direction of shell coiling would confirm to become very important to the long run success on the lineages; endogastric coiling would only permit massive size being attained 메이저사이트 having a straight shell, Whilst exogastric coiling at first somewhat