Did the Cyatheaceae become such a diverse family slowly over time, or in spurts? The largest molecular sampling yet points to gradual accumulation of species.
Normally you would expect organs to change across evolutionary time. However, this is not always the case, and some clades can be species-rich, but still have very similar flowers.
Macroevolution of major clades is often studied by plotting their taxonomic diversity through time. It is equally informative, but less commonplace, to investigate how clades explore anatomical βdesignβ space by...