Abstract

The leaves of the genus Pseudotorellia from the Upper Jurassic–Lower Cretaceous of the Bureya Basin (Russian Far East) have been revised. The similarity of Pseudotorellia angustifolia Doludenko and P. longifolia Doludenko in the morphology and epidermal characters suggests that P. longifolia is a synonym of P. angustifolia. Leaves of this genus from the Bureya Basin previously assigned to P. ensiformis (Heer) Doludenko according to both morphological and epidermal characters are described as a new species P. doludenkoae sp. nov., since the type specimens of P. ensiformis from the Irkutsk Basin do not have preserved cuticles and their leaf epidermal characters are unknown. The epidermal characters of leaves described previously as Pseudotorellia pulchella and P. crassifolia have been studied for the first time. Since these species have similar morphological and epidermal characters, they are described as P. crassifolia, and its emended diagnosis is provided. The well-defined epidermal characters of Pseudotorellia allow us to reliably assign even cuticle fragments and dispersed cuticles to a particular species. This indicates a large stratigraphic potential of the Pseudotorellia species for the intrabasin and interregional stratigraphy of continental deposits, especially when studying the core material and coals, where the preservation of plant remains usually does not allow describing their morphology. The revision of all known occurrences of Pseudotorellia angustifolia makes it possible to discuss the place and time of the first appearance of this species and its subsequent distribution in space and time. Apparently, this species appeared in the Early Jurassic of Eastern Siberia (Kansk Basin). In the Middle Jurassic, its range expanded both to the northwest (Tomsk oblast and Yamal-Nenets Autonomous Okrug), where this species was preserved until the Late Jurassic, and to the east (Irkutsk oblast, Khabarovsk krai (Bureya Basin)), where it survived until the Early Cretaceous.

中文翻译：

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俄罗斯远东布列亚盆地上侏罗统-下白垩统的 Pseudotorellia Florin

摘要

来自布列亚盆地（俄罗斯远东）上侏罗纪-下白垩统的Pseudotorellia属的叶子已经过修订。的相似度Pseudotorellia沙枣Doludenko和P.长叶Doludenko在形态和表皮的字符提示，P.长叶是的同义词P.沙枣。根据形态学和表皮特征，来自布列亚盆地的该属的叶子先前被指定为P. ensiformis (Heer) Doludenko，被描述为新物种P. doludenkoae sp。11 月，由于P. ensiformis 的模式标本伊尔库茨克盆地没有保存的角质层，其叶表皮特征未知。首次研究了先前描述为Pseudotorellia pulchella和P. crassifolia的叶子的表皮特征。由于这些物种具有相似的形态和表皮特征，因此将它们描述为P. crassifolia，并提供了其修正诊断。Pseudotorelli a明确定义的表皮特征使我们能够可靠地将甚至表皮碎片和分散的表皮分配给特定物种。这表明Pseudotorellia 的地层潜力很大大陆沉积物的盆地内和区域间地层学的物种，特别是在研究核心材料和煤时，植物遗骸的保存通常不允许描述它们的形态。对所有已知的Pseudotorellia angustifolia事件的修订使得讨论该物种首次出现的地点和时间以及随后在空间和时间上的分布成为可能。显然，该种出现于东西伯利亚（堪斯克盆地）早侏罗世。在中侏罗世，其分布范围扩展到西北部（托木斯克州和亚马尔-涅涅茨自治区），在那里该物种一直保存到晚侏罗世，以及东部（伊尔库茨克州，哈巴罗夫斯克边疆区（布列亚盆地）），在那里它一直存活到早白垩世。