期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
An edible fruit from the Jurassic of China 被引量:1
1
作者 Li-jun Chen Ye-mao Hou +1 位作者 Peng-fei Yin Xin Wang 《China Geology》 2020年第1期8-15,共8页
Frugivory is an important ecological tie between animals and angiosperms.It plays an important role in the evolution of food webs and energy flow networks in the ecosystem.However,little is known about how old this re... Frugivory is an important ecological tie between animals and angiosperms.It plays an important role in the evolution of food webs and energy flow networks in the ecosystem.However,little is known about how old this relationship can be due to lack of relevant fossil evidence.Here,the authors report a fossil fruit,Jurafructus gen.nov.,a putative angiosperm from the Middle-Late Jurassic(>164 Ma)of Daohugou Village,Inner Mongolia,China,which provides the currently earliest evidence of frugivory.The fossil is a more or less three-dimensionally preserved coalified drupe that has been damaged by animals in two different ways.The pericarp,in addition to the seed coat surrounding parenchyma seed contents,is suggestive of an angiospermous affinity,as such a 3+3 structure is distinct from a three-layered seed coat in gymnosperms.The seed possesses a distal micropyle,attached on the base of the pericarp,suggestive of a former orthotropous ovule in the gynoecium.The damaged pericarp of Jurafructus suggests that firugivory can be dated back to the Middle-Late Jurassic.Apparently,the ecological relationship between angiosperms and animals extends deep into the fossil record. 展开更多
关键词 Jurafructus JURASSIC ANGIOSPERM Evolution ANIMALS FRUGIVORY FRUIT China
下载PDF
Geological age of Chouniukou Formation
2
作者 沈光隆 吴秀元 李克定 《Science China Chemistry》 SCIE EI CAS 1995年第1期107-115,共9页
Studies demonstrate that the Chouniukou Formation of the Qilian Mountains represents a lithostratigraphical unit across series, with its lower part belonging to the Middle-Late Visean, middle part to E-zone of the Ear... Studies demonstrate that the Chouniukou Formation of the Qilian Mountains represents a lithostratigraphical unit across series, with its lower part belonging to the Middle-Late Visean, middle part to E-zone of the Early Namunan, and upper part to the Middle-Late Namurian. The Mid-Carboniferous boundary passes through the bedding plane between the middle and upper parts of this formation. 展开更多
关键词 Chounjukou FORMATION Middle-Late VISEAN NAMURIAN NORTH QILIAN Mountains.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部