The putative Jurassic Angiosperm wood Suevioxylon zonatum revisited.

摘要

As the phylogeny and evolution of angiosperms is being completely rewritten by molecular data, there is renewed interest in the earliest fossil record of the group. A putative Jurassic angiosperm wood, Suevioxylon zonatum Krausel is revisited. We reinvestigated the type material (specimen and five thin sections) with light microscopy and SEM. This reappraisal indicates that S. zonatum is actually a poorly preserved softwood and not an angiosperm..