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