New tracheidoxyls from near the Protophyllocladoxylon leuchsii Kräusel type-locality (El-Kharga, Egypt, Turonian) were xylologically studied. Although most of the samples are not identifiable, one has preserved features, in particular araucarian radial pitting and co-occurrence of podocarpoid and oopores in the cross-fields, which allow assignment to Metapodocarpoxylon libanoticum (Edwards) Dupéron-Laudoueneix et D. Pons. This is the first time that this taxon has been formally recognised among samples from near this location. This sample, a topotype for P. leuchsii, is pivotal in demonstrating that P. leuchsii is a taxonomical synonym of M. libanoticum. This reinforces a recently published nomenclatural proposal to conserve the name Protophyllocladoxylon with a conserved type. It also suggests that, paradoxically as its first type was from Egypt, the genus Protophyllocladoxylon is missing from northern Africa terrestrial biota during the Cretaceous. There, conversely, an endemic vegetation flourished, linked to the large alluvial plains, dominated by Agathoxylon- and Metapodocarpoxylon-trees and which might have been the Angiosperm cradle.

对来自Protophyllocladoxylon leuchsii Kräusel 类型产地（El-Kharga，埃及，Turonian）附近的新管胞木进行了木学研究。尽管大多数样本无法识别，但其中一个保留了特征，特别是南洋杉径向点蚀以及交叉场中罗汉果和卵孔的共存，这允许将其分配给Metapodocarpoxylon libanoticum (Edwards) Dupéron-Laudoueneix et D. Pons。这是该分类群首次在来自该地点附近的样本中得到正式确认。该样本是P. leuchsii 的拓扑型，对于证明P. leuchsii是M. libanoticum的分类同义词至关重要. 这加强了最近发表的命名建议，以保守类型保留Protophyllocladoxylon的名称。它还表明，自相矛盾的是，由于其第一种类型来自埃及，白垩纪期间北非陆地生物群中缺少Protophyllocladoxylon属。相反，那里的地方性植被繁盛，与大型冲积平原相连，以Agathoxylon - 和Metapodocarpoxylon -树为主，可能是被子植物的摇篮。