polygnathus

常见例句

• The Devonian Famennian Condonont fossils which include Palmatlepis gracilis gracilis, P. gracilis sigmoidalis, and Polygnathus germanus are discovered for the first time in the Changjiang area of Hainan Island.
  在海南岛昌江地区首次发现泥盆纪法门期牙形刺 Palmatolepis gracilis gracilis;P.
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