The mid-Ordovician noticed the first cephalopods with septa potent plenty of to cope Using the pressures associated with further water, and will inhabit depths greater than one hundred200 m.[139] The path 메이저사이트 of shell coiling would verify to get crucial to the long run success with the lineages; endogastric coiling would only permit substantial size being attained having a straight shell, While exogastric coiling initially relatively