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Sapindopsis Retallackii
''Sapindopsis'' ("''Sapindus''-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae. Description In the form generic system of paleobotany ''Sapindopsis'' is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins. Distribution and species ''Sapindopsis'' was geographically widespread from Asia to North America. Species include: *†''Sapindopsis magnifolia'' (Fontaine) Dilcher and Basson 1990 ( type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA *†''Sapindopsis anhouryi'' Dilcher and Basson 1990, from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon. *†'' Sapindopsis asiaticus'' G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapindopsis Magnifolia
''Sapindopsis'' ("''Sapindus''-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae. Description In the form generic system of paleobotany ''Sapindopsis'' is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins. Distribution and species ''Sapindopsis'' was geographically widespread from Asia to North America. Species include: *†'' Sapindopsis magnifolia'' (Fontaine) Dilcher and Basson 1990 ( type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA *†'' Sapindopsis anhouryi'' Dilcher and Basson 1990, from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon. *†'' Sapindopsis asiaticus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous Plants
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patapsco Formation
The Patapsco Formation is a geologic formation of varigated clays, sandy clays, and sand in Virginia, the District of Columbia, Maryland, Delaware, Pennsylvania, and in the subsurface of New Jersey. It preserves fossils such as plants and molluscs dating back to the Cretaceous period. See also * List of fossiliferous stratigraphic units in Virginia * List of fossiliferous stratigraphic units in Maryland * Paleontology in Virginia Paleontology in Virginia refers to paleontological research occurring within or conducted by people from the U.S. state of Virginia. The geologic column in Virginia spans from the Cambrian to the Quaternary. During the early part of the Paleozoic ... * Paleontology in Maryland References * Cretaceous Maryland Cretaceous geology of Virginia {{Virginia-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapindopsis Variabilis
''Sapindopsis'' ("''Sapindus''-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae. Description In the form generic system of paleobotany ''Sapindopsis'' is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins. Distribution and species ''Sapindopsis'' was geographically widespread from Asia to North America. Species include: *†''Sapindopsis magnifolia'' (Fontaine) Dilcher and Basson 1990 ( type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA *†''Sapindopsis anhouryi'' Dilcher and Basson 1990, from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon. *†'' Sapindopsis asiaticus'' G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapindopsis Retallackii
''Sapindopsis'' ("''Sapindus''-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae. Description In the form generic system of paleobotany ''Sapindopsis'' is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins. Distribution and species ''Sapindopsis'' was geographically widespread from Asia to North America. Species include: *†''Sapindopsis magnifolia'' (Fontaine) Dilcher and Basson 1990 ( type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA *†''Sapindopsis anhouryi'' Dilcher and Basson 1990, from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon. *†'' Sapindopsis asiaticus'' G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed on the axis of a plant. The modifications can involve the length and the nature of the internodes and the phyllotaxis, as well as variations in the proportions, compressions, swellings, adnations, connations and reduction of main and secondary axes. One can also define an inflorescence as the reproductive portion of a plant that bears a cluster of flowers in a specific pattern. The stem holding the whole inflorescence is called a peduncle. The major axis (incorrectly referred to as the main stem) above the peduncle bearing the flowers or secondary branches is called the rachis. The stalk of each flower in the inflorescence is called a pedicel. A flower that is not part of an inflorescence is called a solitary flower and its stalk is al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dakota Formation
The Dakota is a sedimentary geologic unit name of formation and group rank in Midwestern North America. The Dakota units are generally composed of sandstones, mudstones, clays, and shales deposited in the Mid-Cretaceous opening of the Western Interior Seaway.Monroe, James S. and Wicander, Reed (1997) ''The Changing Earth: Exploring Geology and Evolution'' (2nd edition) Wadsworth Publishing Company, Belmont, California, page 610, The usage of the name Dakota for this particular Albian-Cenomanian strata is exceptionally widespread; from British Columbia and Alberta to Montana and Wisconsin to Colorado and Kansas to Utah and Arizona. It is famous for producing massive colorful rock formations in the Rocky Mountains and the Great Plains of the United States, and for preserving both dinosaur footprints and early deciduous tree leaves. Owing to extensive weathering of older rocks during the Jurassic and Triassic, the Dakota strata lie unconformably atop many different formations rangin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapindopsis Powelliana
''Sapindopsis'' ("''Sapindus''-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae. Description In the form generic system of paleobotany ''Sapindopsis'' is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins. Distribution and species ''Sapindopsis'' was geographically widespread from Asia to North America. Species include: *†''Sapindopsis magnifolia'' (Fontaine) Dilcher and Basson 1990 ( type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA *†''Sapindopsis anhouryi'' Dilcher and Basson 1990, from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon. *†'' Sapindopsis asiaticus'' G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapindopsis Orientalis
''Sapindopsis'' ("''Sapindus''-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae. Description In the form generic system of paleobotany ''Sapindopsis'' is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins. Distribution and species ''Sapindopsis'' was geographically widespread from Asia to North America. Species include: *†''Sapindopsis magnifolia'' (Fontaine) Dilcher and Basson 1990 ( type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA *†''Sapindopsis anhouryi'' Dilcher and Basson 1990, from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon. *†'' Sapindopsis asiaticus'' G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
