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The mid-Ordovician observed the very first cephalopods with septa powerful enough to manage Along with the pressures linked to deeper h2o, and will inhabit depths higher than a hundred200 m.[139] The course of shell coiling would 메이저사이트 demonstrate to become very important to the longer term accomplishment on the lineages; endogastric coiling would only allow big size being attained using a straight shell, Whilst exogastric coiling originally rather

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