Fossil Liverworts from the Lower Cretaceous Huolinhe Formation in Inner Mongolia, China

Fossil Liverworts from the Lower Cretaceous Huolinhe Formation in Inner Mongolia, China
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内蒙古下白垩统霍林河组地草化石

DOI:
10.1111/1755-6724.12727
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发表时间:
2016-06
期刊:
Acta Geologica Sinica (English Edition)
影响因子:
--
通讯作者:
SUN Bainian
SUN Bainian
中科院分区:
其他
文献类型:
--
作者:
MA Fujun;YAN Defei;LIN Zhicheng;SUN Bainian

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新属新种Rebouliothallus huolinhensis sp. nov.,以及两个不确定的物种,Ricciopsis sp。描述了 Hepaticites sp. 和 Hepaticites sp.。这些化石采集于中国东北部霍林河盆地下白垩统霍林河组。新属 Rebouliothallus 是在马钱蒂亚目 (Marchantiales) 的 Aytoniaceae 科中建立的。 Rebouliothallus huolinhensis 似乎与现存 Reboulia Raddi 属的物种非常相似。该物种的特点是腹侧鳞片相对较大。腹鳞较大,呈覆瓦状排列,在腹面排列成两行。假根是有钉的或光滑的。立蝽属sp。其特征是形成玫瑰花结的叶状体。肝炎 sp。与地钱有一些相似之处。中国早白垩世四十九种植物区系中,只有内蒙古霍林河盆地和黑龙江鸡西盆地两种植物区系含有苔类植物化石。中国早白垩世植物区系中罕见的地钱化石记录可能是埋藏学偏差的结果。
A new genus and species, Rebouliothallus huolinhensis sp. nov., and two uncertain species, Ricciopsis sp. and Hepaticites sp., are described. The fossils were collected from the Lower Cretaceous Huolinhe Formation of Huolinhe Basin, northeastern China. The new genus Rebouliothallus was established in the Aytoniaceae family of Marchantiales. Rebouliothallus huolinhensis appears to be quite similar to species of the extant genus Reboulia Raddi. The species is characterized by the relatively large ventral scales. Ventral scales are large, imbricate and arranged in two rows on the ventral surface. Rhizoids are either pegged or smooth. Ricciopsis sp. is characterized by the rosette‐forming thallus. Hepaticites sp. shows some similarities to liverworts. Of the forty‐nine Early Cretaceous floras of China, only two floras, one from the Huolinhe basin, Inner Mongolia and the other from the Jixi Basin, Heilongjiang Province, contain fossil liverworts. The rare fossil liverwort records in the Early Cretaceous floras of China may be the result of taphonomic bias.
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