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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.
Fossil collecting – Collecting fossils to study, collect or sell; Fossil park; Jurassic Coast – World Heritage Site on the coast of southern England; Lagerstätte – Sedimentary deposit with well-preserved extraordinary fossils; Lists of dinosaur-bearing stratigraphic units; List of fossil parks around the world; List of fossil parks in India
The Trout Valley Formation also contains fossilized Psilophyton plants, as well as a number of other taxa, including Pertica quadrifaria, the official state fossil, [3] the tallest plant of its age known from anywhere in the world.
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.
The class was created in 1917 by Kidston and Lang for fossils found in the Rhynie Chert Bed. [4] Three genera were initially included, Rhynia, Horneophyton and Psilophyton. All lacked leaves and true roots, consisting only of branched stems; however they were considered to contain vascular tissue. [1] Additional fossil genera were added later.
Following is a list of protected areas where fossils are preserved, known as fossil parks or fossil reserves, worldwide by country. Africa. Egypt. Wadi ...
Psilotum is a genus of fern-like vascular plants.It is one of two genera in the family Psilotaceae commonly known as whisk ferns, the other being Tmesipteris.Plants in these two genera were once thought to be descended from the earliest surviving vascular plants, but more recent phylogenies place them as basal ferns, as a sister group to Ophioglossales.
The formation contains a basal limestone conglomerate overlain by evenly bedded red or gray limestones (more accurately, limy mudstones) and calcareous shales.It is a lenticular, channel-fill deposit which is some 2,500 feet (760 m) wide and 250 feet (76 m) thick at maximum.