...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Botanical Journal of the Linnean Society >The fossil history of palms (Arecaceae) in Africa and new records from the Late Oligocene (28-27 Mya) of north-western Ethiopia
【24h】

The fossil history of palms (Arecaceae) in Africa and new records from the Late Oligocene (28-27 Mya) of north-western Ethiopia

机译：非洲棕榈科的植物化石历史和埃塞俄比亚西北部的渐新世晚期（28-27 Mya）的新记录

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The African palm fossil record is limited but the data provide an outline of palm evolution from the Late Cretaceous through the Neogene. Pollen attributed to palms is reported from the Aptian (125-112 Mya), but the earliest unequivocal record in Africa is Campanian (83.5-70.6 Mya). Palms diversified 83.5-65.5 Mya and became widespread, although most records are from the west and north African coasts. Many taxa were shared between Africa and northern South America at that time, but a few were pantropical. Extirpations occurred throughout the Palaeogene, including a notable species turnover and decline at the Eocene-Oligocene boundary (33.9 Mya), a change that resulted in the elimination of nypoid palms from Africa. The Neogene plant macrofossil record is better sampled than the Palaeogene, although few palms are documented. Thus, the low diversity of African palms today is more likely the result of Palaeogene, rather than Neogene extinctions. Newly discovered palm fossils of leaves, petioles and flowers from the Late Oligocene (27-28 Mya) of north-western Ethiopia document the abundance and dominance of palms in some communities at that time. The fossils represent the earliest records of the extant genera Hyphaene (Coryphoideae) and Eremospatha (Calamoideae).
机译：非洲棕榈化石的记录是有限的，但数据提供了从晚白垩世到新近纪的棕榈演化的概况。据报道，阿普提安人（125-112玛雅）的花粉归因于棕榈，但非洲最早的明确记录是坎帕尼亚人（83.5-70.6玛雅）。尽管多数记录来自西非和北非沿海地区，但棕榈树多样化了83.5-65.5米亚（Maya）并变得广泛。当时非洲和南美洲北部共享许多生物分类，但有些是泛热带的。整个古近纪都发生了灭绝，包括始新世-渐新世边界（33.9 Mya）的明显物种更新和衰退，这一变化导致非洲的幼虫被灭绝。尽管记录的棕榈很少，但新近纪的植物化石记录比古近纪的取样更好。因此，当今非洲棕榈的低多样性很可能是古近纪而不是新近纪灭绝的结果。埃塞俄比亚西北部晚渐新世（27-28 Mya）的新发现的叶子，叶柄和花朵的棕榈化石记录了当时某些社区中棕榈的丰富和优势。这些化石代表了现存的Hyphaene（Coryphoideae）和Eremospatha（Calamoideae）的最早记录。

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号