Porolepiforms represent a clade of Devonian stem lungfishes, divided into the cosmine‐bearing and probably paraphyletic ‘Porolepidae’ (e.g. Porolepis, Heimenia) and the cosmine‐free and stratigraphically younger Holoptychiidae (e.g. Holoptychius, Glyptolepis, Laccognathus). Data on the dermoskeleton are available for both groups, but are more limited for ‘porolepids’. Here we present new information on the ‘porolepid’ Durialepis edentatus from the Emsian (Early Devonian) of Germany based on micro‐computed tomography. The material comprises an articulated skull of a single three‐dimensionally preserved individual. The arrangement of the cheekbones of Durialepis edentatus recalls that of Porolepis brevis, with the occurrence of two subsidiary squamosals. However, the parieto‐ethmoidal and postparietal shields are roughly equal in size, a condition similar to that of Glyptolepis groenlandica and intermediate between Porolepis brevis and holoptychiids. A large parasymphysial tooth plate displays five tooth rows with three large tusks in the median row, another intermediate arrangement between the primitive condition of Porolepis sp. (eight rows) and holoptychiids (five or fewer rows). Remarkably among porolepiforms, this dental plate is perfectly symmetrical. Despite the occurrence of cosmine and rhombic scales, the combination of traits displayed in Durialepis deviates from Porolepis in several ways, reflecting features shared with holoptychiids to the exclusion of other ‘porolepids’. Durialepis edentatus is thus a key addition to our knowledge of ‘porolepid’ anatomy. Because Durialepis edentatus preserves much of the cranial and postcranial skeleton in a single individual, it represents a suitable early dipnomorph representative for inclusion in phylogenetic analyses on sarcopterygians and early osteichthyans.

中文翻译：

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泥盆纪（Emsian）opter翅目Durialepis edentatus Otto（Dipnomorpha，Porolepiformes）的颅骨重新命名

猪形目代表泥盆纪干肺鱼的进化枝，分为含浓脂的和可能是共生的``多孔膜''（例如Porolepis，Heimenia）和无地层且地层较年轻的Holoptychiidae（例如Holoptychius，Glyptolepis，Laccognathus）。两组均可获得有关皮骨骼的数据，但“类脂”的数据更为有限。在这里，我们基于微计算机断层扫描技术，介绍了来自德国Emsian（泥盆纪早期）的“孔状” Duralepis edentatus的新信息。该材料包括一个单独的三维保存的个体的铰接式头骨。榴莲的ial骨排列回顾一下短毛孔雀（Porolepis brevis）的情况，其中出现了两个辅助鳞片。然而，顶筛筛骨和顶壁筛骨的大小大致相等，这种情况类似于格罗夫菌（Glyptolepis groenlandica），且位于短毛细孔虫（Porolepis brevis）和类鳞翅目之间。一个大的共旁突齿板显示五排牙齿，中间排有三个大牙，这是Porolepis sp。原始状态之间的另一种中间排列。（八行）和钩足类动物（五行或更少行）。在多孔形中，这种牙板是完全对称的。尽管发生了胭脂红和菱形鳞片，但Durialepis中显示的性状组合却偏离了Porolepis以几种方式反映了与钩足类动物共有的特征，而排除了其他“ porolepids”。因此，对我们的“多孔性”解剖学知识而言，EDURALIDS是一个关键的补充。由于榴莲（Durialepis edentatus）在单个个体中保留了许多颅骨和颅后骨骼，因此它代表了适合在拟翅足类动物和早期骨鱼类的系统发育分析中包括的早期双峰形态代表。