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A new species of Phoenicopsis (Leptostrobales) from the Maastrichtian–Danian of Chukotka, Russia
Geobios ( IF 1.6 ) Pub Date : 2020-11-18 , DOI: 10.1016/j.geobios.2020.09.002
Anastasia Zolina , Lina Golovneva , Natalya Nosova , Alexander Grabovskiy

A new species, Phoenicopsis anadyrensis Nosova, is described based on the leaf morphology and cuticle features from the Maastrichtian–Danian Rarytkin Formation, Chukotka, North-East of Russia. It is characterized by hypostomatic leaves with stomatal bands on the abaxial side, undulate anticlinal epidermal cell walls and papillae on the epidermal cells and on the subsidiary cells of the stomata. The new species is the youngest reliable representative of the genus Phoenicopsis. This record extends the stratigraphic range of Phoenicopsis from its previously known latest records in the early Campanian up to Maastrichtian–Danian. The persistence of the genus Phoenicopsis up to the Cretaceous–Paleogene boundary is most likely related with vicinity to mountain floras associated with Late Cretaceous and Paleogene volcanic uplands.



中文翻译:

来自俄罗斯楚科奇的马斯特里赫特-达尼安的一种新的拟南芥(Peptnicopsis)(Leptostrobales)

根据俄罗斯东北部楚科奇的马斯特里赫特-达尼安·拉里特金组的叶片形态和表皮特征描述了一种新种,即Phoenicopsis anadyrensis Nosova 。它的特征是叶片具气孔,叶片的背面有气孔带,在表皮细胞和气孔的辅助细胞上起伏的表皮细胞壁和起伏的乳突表皮细胞壁。新物种是楠(Phoenicopsis)属中最年轻的可靠代表。该记录将泥炭纪的地层范围从早在坎潘期的先前已知的最新记录扩展到了马斯特里赫特–丹宁。轮虫属的持久性 直至白垩纪-古近纪边界最可能与白垩纪晚期和古近纪火山山地相关的山地植物群的附近有关。

更新日期:2020-12-08
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