| 单词 | nematognathous | 
| 释义 | > as lemmasnematognathous ΚΠ 1890    Cent. Dict.  				Nematognathous, same as nematognath. 1895    Science 22 Nov. 679/1  				With this assumption it becomes necessary to postulate that all the numerous families of the Plectospondylous and Nematognathous orders are derivatives from primitive fresh-water types. < as lemmas | 
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