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When did gymnosperms first appear?

The earliest reliable record of gymnosperms dates their appearance to the Carboniferous period (359–299 million years ago). Gymnosperms were preceded by the progymnosperms (“first naked seed plants”).

What happened to gymnosperms during the Carboniferous period?

The radiation of gymnosperms during the Carboniferous appears to have resulted from a whole genome duplication event around 319 million years ago. Early characteristics of seed plants are evident in fossil progymnosperms of the late Devonian period around 383 million years ago.

What is a gymnosperm?

... (Show more) gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule —unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally “naked seeds”) are borne in cones and are not visible until maturity.

What are some examples of gymnosperms in Mesozoic era?

Prominent Mesozoic gymnosperms included a great variety of cycads, Ginkgo relatives, and gnetophytes (Fig 24.5). Conifers similar to those in our modern flora, including forms of cypress, juniper, monkey puzzle tree, pine, and redwood, first appeared in the early Triassic period.


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