Taxonomic delimitation among Pennsylvanian marattialian fructifications
Taxonomic delimitation among Pennsylvanian marattialian fructifications
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发表时间：
1984-05
影响因子：
1.4
通讯作者：
Sara P. Stubblefield
中科院分区：
文献类型：
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作者：
Sara P. Stubblefield
描述了采自俄亥俄州东南部上宾夕法尼亚阶的大量压缩的羊齿类植物叶片中的一个新种。一些标本的孢子囊腔渗透与黄铁矿保留三维结构，并允许与permineralized Scolecopteris和Astrulangium，以及与压缩Asterotheca比较。对合囊的对称性、附着和结构的研究表明，该属属于目前公认的小鳞蕨属物种的变异范围。部分矿化的标本证明了将分类群建立在一些不同特征上的重要性，以便包括生物学相关的材料，并尽量减少由于保存而引起的变化的影响。修改期刊摘要。
A new species of Scolecopteris is described from an extensive collection of compressed pecopterid foliage from the Upper Pennsylvanian of southeastern Ohio. The sporangial cavities of some specimens are infiltrated with iron pyrite preserving three-dimensional structure and allowing comparison with permineralized Scolecopteris and Acaulangium, as well as with compressed Asterotheca. Examination of synangial symmetry, attachment and construction shows Acaulangium to fall within the range of variation exhibited by currently recognized species of Scolecopteris. Partially permineralized specimens demonstrate the importance of basing taxa on a number of different features in order to include biologically related material and minimize the influence of variation due to preservation.--Modified journal abstract.