Abstract Late Jurassic paleobotanical records from the northeast of Gondwana are rare. We present the first palynological assemblage from the upper part of the Antalo Limestone Formation from the Blue Nile Basin (central western Ethiopia). A diverse and well-preserved assemblage of palynomorphs with 71 morphospecies belonging to 39 morphogenera, including pollen, spores, fungi, algae, dinoflagellates cysts and foraminifera test linings are recorded. The First Occurrences (FOs) and Last Occurrences (LOs) of key taxa such as Cicatricosisporites spp., Pilosisporites trichopapillosus (Thiergart) Delcourt and Sprumont, 1955, Leptolepidites psarosus Norris, 1969, Cibotiumspora jurienensis (Balme) Filatoff 1975 and Callialasporites turbatus (Balme) Schulz, 1967 are indicative of an age between Late Kimmeridgian and Late Tithonian. The recorded palynological association is dominated by palynomorphs of continental origin (mostly pollen and spores). Prasinophyceae, dinoflagellate cysts and foraminiferal test linings have also been recorded that suggest marine influence within a setting very close to the continental landmass. The botanical affinities and environmental characteristics of the identified pollen and spores indicate the presence of three types of continental plant communities (sporomorph ecogroups): coastal plant communities with a dry climate and lowland and riverbank communities signaling a more humid and warm climate.

中文翻译：

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青尼罗河流域上侏罗纪孢粉学（埃塞俄比亚）

摘要 冈瓦纳大陆东北部晚侏罗世古植物记录少见。我们展示了青尼罗河盆地（埃塞俄比亚中西部）安塔洛石灰岩组上部的第一个孢粉组合。记录了一个多样化且保存完好的孢粉类集合，其中包含 71 个形态种，属于 39 个形态发生属，包括花粉、孢子、真菌、藻类、鞭毛虫囊肿和有孔虫测试衬里。关键分类群的首次出现 (FO) 和最后出现 (LO)，例如 Cicatricosisporites spp.、Pilosisporites trichopapillosus (Thiergart) Delcourt 和 Sprumont，1955、Leptolepidites psarosus Norris，1969，Cibotiumspora juienensis (Callen ) Schulz, 1967 表明介于晚金立纪和晚提通纪之间的年龄。记录的孢粉关联主要是大陆起源的孢粉型（主要是花粉和孢子）。还记录了海藻科、甲藻囊肿和有孔虫测试衬里，这表明在非常接近大陆陆地的环境中受到海洋影响。鉴定出的花粉和孢子的植物亲和性和环境特征表明存在三种类型的大陆植物群落（孢子形生态群）：气候干燥的沿海植物群落和低地和河岸群落，表明气候更加潮湿和温暖。还记录了甲藻囊肿和有孔虫测试衬里，表明在非常接近大陆陆地的环境中受到海洋影响。鉴定出的花粉和孢子的植物亲和性和环境特征表明存在三种类型的大陆植物群落（孢子形生态群）：气候干燥的沿海植物群落和低地和河岸群落，表明气候更加潮湿和温暖。还记录了甲藻囊肿和有孔虫测试衬里，表明在非常接近大陆陆地的环境中受到海洋影响。鉴定出的花粉和孢子的植物亲和性和环境特征表明存在三种类型的大陆植物群落（孢子形生态群）：气候干燥的沿海植物群落和低地和河岸群落，表明气候更加潮湿和温暖。