Rugosa and tabulata
Rugosa and tabulata
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发表时间：
1981
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影响因子：
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通讯作者：
D. Hill
中科院分区：
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作者：
D. Hill
复方十字花科;通常轴向有点加厚的板条状的柱，在早期阶段连续，具主隔膜和反隔膜，但后来通常仅具反隔膜;扁平的底圆锥形;小裂片完全或不完全;通常有二型体，其中柱失败，小裂片变平，一些发育成一个小凹;通常正常的分隔膜，与近球形的分隔膜同心，小隔膜通常纵向连续;主凹不明显。碳水化合物Perm.
Compound Stauriida; commonly with axially somewhat thickened lathlike columella continuous in early stages with cardinal and counter septa but later commonly with counter septum only; tabular floors conical; tabulae complete or incomplete; diphymorphs in which columella fails and tabulae flatten are common, some develop an aulos; dissepimentarium commonly normal, concentric with subglobose dissepiments, and minor septa commonly continuous longitudinally; cardinal fossula not distinct. Carb.-Perm.