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The mid-Ordovician noticed the very first cephalopods with septa robust adequate to cope Together with the pressures connected to deeper h2o, and will inhabit depths increased than 100200 m.[139] The direction of shell coiling would verify being critical to the future success with the lineages; endogastric coiling would only allow massive dimensions for being attained having a straight 안전놀이터 shell, Whilst exogastric coiling originally rather