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A shoot with attached leaves of Desmiophyllum harrisii Barbacka et Pacyna from the Rhaetian of Bavaria, Germany
PalZ ( IF 1.8 ) Pub Date : 2019-06-25 , DOI: 10.1007/s12542-019-00474-x
Johanna H. A. van Konijnenburg-van Cittert , Christian Pott , Evelyn Kustatscher , Johan van der Burgh , Stefan Schmeißner , Günter Dütsch

Desmiophyllum harrisii was described from the Hettangian of Poland based on specimens yielding dispersed leaf fragments only, albeit with cuticle. Here, we record a shoot with attached leaves assignable to Desmiophyllum harrisii from the Rhaetian of Bavaria, besides a few specimens with dispersed leaf fragments. The leaves yielded also a thin and fragmentary cuticle with stomata arranged in characteristic single, short longitudinal files. This record does not only expand the temporal range of the species but also necessitates emending the specific diagnosis accordingly. The affinity of Desmiophyllum among gymnosperms is still uncertain, and the epidermal anatomy resembles that of Czekanowskiales and of some fossil taxa that have been assigned to Ginkgoales and Coniferales. The thin cuticle points to a habitat in moist environments.

中文翻译:

附有德国巴伐利亚州Rhaetian的Desmiophyllum harrisii Barbacka et Pacyna叶片的芽

根据波兰的Hettangian的描述,Harsii的Desmiophyllum harrisii只能产生散布的叶子碎片(尽管有角质层)。在这里,我们记录了一个芽,其芽附有可分配给巴伐利亚Rhaetian的Desmiophyllum harrisii的叶子,此外还有一些带有分散的叶子碎片的标本。叶片还产生了一个细而碎的表皮,气孔排列在典型的单个,短的纵向锉中。该记录不仅扩大了物种的时间范围,而且还需要相应地对具体诊断进行修正。去皮的亲和力裸子植物中的表皮解剖仍然是不确定的,其表皮解剖类似于Czekanowskiales以及分配给Ginkgoales和Coniferales的一些化石分类群。薄的角质层指向潮湿环境中的栖息地。
更新日期:2019-06-25
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