| 词条 | Taxodiaceae |
| 释义 |
The Taxodiaceae were at one time regarded as a distinct plant family comprising the following ten genera of coniferous trees:
However, recent research has shown that the Taxodiaceae, with the single exception of Sciadopitys, should be merged into the family Cupressaceae.{{Citation needed|date=August 2015}} There are no consistent characters by which they can be separated, and genetic evidence demonstrates close relationships; this merging is now becoming widely accepted.{{Citation needed|date=August 2015}} The one exception, the genus Sciadopitys, is genetically very distinct from all other conifers, and now treated in a family of its own, Sciadopityaceae. As proposed, genera of the former Taxodiaceae are grouped in the following subfamilies within the larger Cupressaceae:
EvolutionIn earth's history Taxodiaceae were widespread. They are known since the Jurassic and can be found as fossil e.g. in layers from Tertiary times. See also
External links
3 : Cupressaceae|Pinales families|Historically recognized plant families |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。