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Pteruchus Barrealensis
''Pteruchus barrealensis'' is an unusually large species of ''Pteruchus'' with very elongate polleniferous heads from Early Triassic of Australia and Argentina. Description ''Pteruchus barrealensis'' is one of the geologically earliest species of ''Pteruchus'', and has very elongate polleniferous heads. Whole plant reconstruction ''Pteruchus barrealensis'' from the Early Triassic of Australia may have been produced by the same plant as '' Umkomasia feistmantelii'' (ovulate organs) and ''Dicroidium zuberi ''Dicroidium zuberi'' is a large bipinnate species of the seed fern ''Dicroidium'' with a forked rachis In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In verteb ...'' (leaves) References Triassic plants Pteridospermatophyta {{triassic-plant-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteruchus
''Pteruchus'' is a form genus for pollen organs of the seed fern (Pteridospermatophyta family Umkomasiaceae. It was first described by Hamshaw Thomas from the Umkomaas locality of South Africa. It is associated with the seed bearing organs '' Umkomasia'' and ''Dicroidium'' leaves. Description The pollen organ ''Pteruchus'' differs from other seed fern pollen organs in having numerous pendant pollen sacs from a blade-like head, in an arrangement similar to an epaulette. Whole plant reconstructions *'' Pteruchus africanus'' may have been produced by the same plant as '' Umkomasia macleanii'' (ovulate organs) and ''Dicroidium odontopteroides'' (leaves), based on cuticular similarities between these leaves and reproductive structures at the Umkomaas locality of South Africa. *'' Pteruchus barrealensis'' may have been produced by the same plant as '' Umkomasia feistmantelii'' (ovulate organs) and ''Dicroidium zuberi ''Dicroidium zuberi'' is a large bipinnate species of the se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic
The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the chief terrestrial vertebrates during this time. A specialized subgroup of archo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's List of countries and dependencies by area, sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a Megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and climates, with Deserts of Australia, deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approximately Early human migrations#Nearby Oceania, 65,000 years ago, during the Last Glacial Period, last i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umkomasia Feistmantelii
''Umkomasia feistmantelii'' is an unusually large species of ''Umkomasia'' from the Early Triassic of New South Wales, Australia. Description ''Umkomasia feistmantelii'' is found both with cupules enclosing the large seeds and with cupules open and expandede into a star-shaped form. Whole Plant Reconstruction ''Umkomasia feistmantelii'' from the Early Triassic of Australia may have been produced by the same plant as ''Pteruchus barrealensis'' (pollen organs) and ''Dicroidium zuberi ''Dicroidium zuberi'' is a large bipinnate species of the seed fern ''Dicroidium'' with a forked rachis In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In verteb ...'' (leaves) See also * Evolution of plants References External links Paleodb.org: ''Umkomasia feistmanteli'' Permian plants Triassic plants Pteridospermatophyta Cisuralian life Early Triassic life Plants described in 1987 Cis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicroidium Zuberi
''Dicroidium zuberi'' is a large bipinnate species of the seed fern ''Dicroidium'' with a forked rachis In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this c .... The leaves are affiliated with ''Umkomasia feistmantellii'' megasporophylls and ''Petruchus'' ''barrealensis'' microsporophylls. ''D. zuberi'' was a common species in the coeval vegetation of the Sydney and Lorne Basins of New South Wales. Specimens have been found near Wairaki Hut and indicate that this species may have been as common in Scytho-Anisian vegetation of coastal New Zealand. In younger rocks younger than the late Anisian, they are outnumbered by unipinnate ''Dicroidium'' leaves such as those belonging to ''D. odontopteroides''. Description ''Dicroidium zuberi'' had large, bipinnate, thick and leathery leaves. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic Plants
The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the chief terrestrial vertebrates during this time. A specialized subgroup of archosaurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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