Twenty-seven specimens from the Carnian flora of Lunz am See, Austria, belonging to Dioonitocarpidium, a genus to accommodate cycadalean megasporophylls, have been examined. In agreement with older reports, two clearly separable species have been identified, viz. Dioonitocarpidium titzei (Krasser 1917) Pott, comb. nov., and Dioonitocarpidium liliensternii Kräusel 1953, emend. Pott. Both species required a revision after examination of the original specimens and the related bibliography. For the first time, epidermal anatomy is described for a Dioonitocarpidium species from cuticle remains. The sterile foliage of the Dioonitocarpidium parent plant is discussed and giant cycad-like foliage assigned to Nilssonia is identified as the most plausible option. The putative assignment of the Dioonitocarpidium megasporophylls to the Cycadales is also discussed.

中文翻译：

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奥地利卢恩斯湖畔Carnian（晚三叠世）植物区系的cycadalean megasporophyll Dioonitocarpidium

研究人员对来自奥地利卢恩斯湖畔卡尔尼植物区的27个标本进行了研究，这些标本属于Dioonitocarpidium（一种可以容纳cycadalean megasporophylls的属）。与较早的报告一致，已确定了两个明显可分离的物种，即。Dioonitocarpidium titzei（Krasser 1917）盆，梳。十一月，和Dioonitocarpidium liliensterniiKräusel1953年修订。波特。在检查原始标本和相关书目后，两个物种都需要进行修订。第一次，描述了来自角质层残骸的Dioonitocarpidium物种的表皮解剖。讨论了Dioonitocarpidium亲本植物的不育叶子，并将巨苏铁类叶子分配给Nilssonia被认为是最合理的选择。还讨论了假定的大孢藻Dioonitocarpidium对Cycadales的分配。