Unformatted text preview: the tree) rela*ve to other taxa early land plant *me line • ~500 mya the ancestral land plant evolves from a green alga species living in shallow freshwater • lycophytes (club mosses and related groups) and pteridophytes (horsetails, ferns, others) appear 409‐354 mya (Devonian period) • Forests of lycophytes, some 40m tall dominated during the Carboniferous period (360‐300 mya) – dominant land life form for ~200 my – became coal deposits in N. America, Europe, elsewhere h[p://archive.ﬁeldmuseum.org/
models_images/geo75400.JPG land plant fossil record • vascular plants fossilize be[er, appear in the fossil record before nonvascular plants • DNA evidence provides evidence that nonvascular plants predated vascular plants – this is the accepted view • ancient microfossils have cellular morphology similar to modern day liverworts Mosses...
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- Spring '08
- land plants, green algae