A palynological assemblage including the extinct araucarian dispersed pollen, Cyclusphaera scabrata, was analysed from the Achiri locality, Bolivian Altiplano. The fossil-yielding locality of Achiri is located in the Pacajes Province, La Paz Department, in the northwestern Altiplano, Bolivia. The Achiri locality is very well known by the fossil vertebrate faunas recovered from the Mauri Formation (M6). The palynological samples come from fine-grained and plant-rich lacustrine levels lower in the same unit. An age between late middle to early late Miocene? was inferred for the palynological association studied, based on local stratigraphy and radioisotopic ages obtained higher in the series. The retrieved association is mainly represented by angiosperms; although gymnosperms, bryophytes, ferns, and fresh-water algae are also documented. Compositae are the most abundant group within angiosperms, and Polylepis also occurred but in low percentages. The presence of C. scabrata in the Bolivian Altiplano expands the taxon distribution outside northern South America and provides additional evidence to infer timing and distribution routes of conifers, restricted toward the tropics during the latest Neogene. Its occurrence supports a paleoelevation of no more than 2000 m for the northern area of the Altiplano in agreement with previous results. Compositae of Fenestrites type and Polylepis occur earlier in Bolivia and C. scabrata later, comparing their occurrence in miocene microfloras from low to mid-latitudes of South America.

从玻利维亚高原的 Achiri 地区分析了包括已灭绝的南洋杉分散花粉Cyclusphaera scabrata的孢粉组合。阿奇里的化石产地位于玻利维亚阿尔蒂普拉诺西北部的拉巴斯省帕卡耶斯省。阿奇里地区因从毛里组 (M6) 中发现的脊椎动物化石而闻名。孢粉学样本来自同一单元中较低的细粒和植物丰富的湖泊。一个介于中新世晚期至晚期中新世早期之间的时代？根据当地地层学和该系列中更高的放射性同位素年龄，推断出所研究的孢粉学关联。检索到的关联主要以被子植物为代表；虽然还记录了裸子植物、苔藓植物、蕨类植物和淡水藻类。菊科是被子植物中最丰富的组，多鳞属也有出现，但百分比很低。C. scabrata在玻利维亚高原的存在扩大了南美洲北部以外的分类群分布，并提供了额外的证据来推断针叶树的时间和分布路线，这些针叶树在最近的新近纪期间仅限于热带地区。它的出现支持 Altiplano 北部地区的古海拔不超过 2000 m，这与先前的结果一致。Fenestrites类型和Polylepis的组合物在玻利维亚和C. scabrata出现较早后来，比较了它们在南美洲中低纬度地区的中新世微生物群落中的出现。