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schwagerina 添加释义

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Schwagerina

  • abstract: Schwagerina is an extinct fusulinacean genus of (Foraminifera that is used as an Early Permian index fossil. The overall shape of the shell or test is fusiform to subcylindrical, the spirotheca, or outer test wall, is thick, and composed of tectum and alveolar keriotheca; the septa are fluted throughout the length of the shell, intense to top of chambers in some, only in lower parts in others; axial fillings highly variarble, chomata distinct or thin and discontinuous.

以上来源于: WordNet

双语例句

  • Main oryctocoenose preserved in limestone of platform facies includes various types of large bodies, such as Schwagerina subnathorsti(Lee), S. sp.

    主要生物化石发育于台地灰岩包括、牙形石个体较大化石;

    youdao

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