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Psilophyton is a genus of extinct vascular plants. Described in 1859, it was one of the first fossil plants to be found which was of Devonian age (about 420 to 360 million years ago ). Specimens have been found in northern Maine , USA; Gaspé Bay , Quebec and New Brunswick , Canada; the Czech Republic ; and Yunnan , China.
Trimerophytopsida (or Trimeropsida) is a class of early vascular plants from the Devonian, informally called trimerophytes.It contains genera such as Psilophyton.This group is probably paraphyletic, and is believed to be the ancestral group from which both the ferns and seed plants evolved.
This list of the Cenozoic life of Alaska contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Alaska and are between 66 million and 10,000 years of age. Acanthocardia; Acirsa; Acmaea; Agonum †Ainus; A living Alces, or moose Alces; Alnus; Alopex †Alopex lagopus; Alvania; Amara ...
Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends. Another term, "zone fossil", is used when the fossil has all the characters stated above except wide geographical distribution; thus, they correlate the surrounding rock to a biozone rather than a specific time period.
This list of the Cenozoic life of Maine contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Maine and are from 66 million years of age to geologically recent. Astarte †Astarte borealis †Astarte castanea †Astarte elliptica †Astarte montagui †Astarte sulcata; A living Bison ...
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There have been some discoveries of unusually well-preserved fossil dinosaur specimens which bear remnants of tissues and bodily structures.Organic tissue was previously thought to decay too quickly to enter the fossil record, unlike more mineralised bones and teeth, however, research now suggests the potential for the long-term preservation of original soft tissues over geological time, [1 ...
Scientists from New Zealand and Senckenberg finally have some answers, thanks to their recent discovery of a fossil belonging to a giant, 150-centimetre long penguin.