早泥盆世是陆生维管植物演化与多样性分异的重要时期, 该时期植物群在澳大利亚、加拿大、英国及我国的华南等地均有广泛分布。本文基于华南板块贵州赫章下泥盆统丹林组采集的植物化石新材料, 识别出了Zosterophyllum sp.和1种未知茎轴及1种具刺植物。新发现的化石标本丰富了赫章早泥盆世植物群的面貌, 进一步证实了工蕨纲植物在华南早泥盆世植物群中的优势地位。综合本文与之前对于赫章早泥盆世植物产地的研究结果, 并与全球早泥盆世相关典型植物群对比发现, 该植物群拥有的Demersatheca contigua (Li et Cai) Li et Edwards在华南多地均有产出记录, 而Zosterophyllum Penhallow为世界广布性的属。另外, 新发现的具刺植物在华南早泥盆世植物中较为罕见, 可能与华南泥盆纪植物群的独特性有关, 其古生物学特征与古生态学意义有待进一步研究。

The Early Devonian witnessed the early diversity of vascular land plants. Floras of this epoch are widely distributed in Australia, Canada, Britain, South China, etc. In this study, based on new fossil materials collected from the Lower Devonian Danlin Formation in Hezhang, Guizhou Province, Southwestern China, we recognize Zosterophyllum sp., a plant with unidentified axis, and a spiny plant. Our new materials augment the Early Devonian flora of Hezhang and further verify the dominance of Zosterophyllopsida in the Early Devonian floras of South China. We also compare the Hezhang Flora with plant assemblages from other localities in the South China Plate and other typical relevant floras around the world. The Early Devonian Hezhang Flora shares Demersatheca contigua (Li et Cai) Li et Edwards with other localities in southern China and consists of the cosmopolitan genus Zosterophyllum Penhallow. In addition, a spiny plant recognized from this flora is rarely seen from other coeval floras in southern China, which may be related to the uniqueness of this flora. However, more research is needed to reveal the paleontological characters and paleoecological significance of these new plants.

国家自然科学基金项目(42202007), 山东省自然科学基金项目(ZR2022QC257)和国家重点实验室开放课题(223127)联合资助