Pronephrium stiriacum (Unger) Knobloch et Kvaček 1976 (Filicales, Thelypteridaceae Holttum 1971) is reported from the Oligocene Petroșani Basin and from the Miocene Bozovici Basin in Romania. Morphological variations of this species, such as size of the leaves, venation and marginal teeth, in the Oligocene–Miocene time interval in Romania are described, discussed and illustrated. The distribution of the Thelypteridacean species Pronephrium stiriacum is also discussed regarding its European expansion during the Cenozoic. Moreover, the palaeoecology of this species is discussed based on taphonomy and occurrences, as Pronephrium stiriacum was a secondary coal generator.

中文翻译：

---

Genus Pronephrium Presl 1851 (Thelypteridaceae) 在罗马尼亚

从渐新世 Petroșani 盆地和罗马尼亚的中新世 Bozovici 盆地报道了 Pronephrium Stiriacum (Unger) Knobloch et Kvaček 1976 (Filicales, Thelypteridaceae Holttum 1971)。描述、讨论和说明了该物种在渐新世-中新世时间间隔内的叶大小、脉络和边缘牙齿的形态变化。还讨论了 Thelypteridacean 物种 Pronephrium Stiriacum 的分布，讨论了其在新生代期间的欧洲扩张。此外，该物种的古生态学是根据埋藏学和事件讨论的，因为 Pronephrium Stiriacum 是次要的煤炭发电机。