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The mid-Ordovician saw the primary cephalopods with septa robust sufficient to manage Together with the pressures related to further drinking water, and will inhabit depths increased than 100200 m.[139] The course of shell coiling would demonstrate to be critical to the future results from the lineages; endogastric coiling 먹튀사이트 would only allow huge sizing for being attained with a straight shell, While exogastric coiling in the beginning relatively