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1977 In Paleontology
Plants Ferns and fern allies Conifers Angiosperms Invertebrates Mollusks Conodonts Fish Archosauriformes Non-avian dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Birds Pterodactyls Expeditions, field work, and fossil discoveries * Trexler found hadrosaur remains west of Choteau, Montana in strata of the Two Medicine Formation. Popular culture Literature * ''The Year of the Dinosaur'' Edwin H. Colbert and illustrated by his wife, Margaret was published. This story describes a year in the life of a "brontosaur" and was an attempt to educate the reader about prehistory through a fictional portrayal of it. References {{Reflist, refs= {{cite book, last=Sarjeant , first=W. A. S. , year=2001 , chapter=Dinosaurs in fiction , title=Mesozoic Vertebrate Life , editor1-last=Tanke , editor1-first=D. H. , editor2-last=Carpenter , editor2-first= K. , publisher=Indiana University Press , pages=504–529 Paleontology Paleontology (), also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anemia Gunni
Anemia or anaemia (British English) is a blood disorder in which the blood has a reduced ability to carry oxygen due to a lower than normal number of red blood cells, or a reduction in the amount of hemoglobin. When anemia comes on slowly, the symptoms are often vague, such as Fatigue, tiredness, weakness, shortness of breath, headaches, and a Exercise intolerance, reduced ability to exercise. When anemia is acute, symptoms may include confusion, lightheadedness, feeling like one is going to pass out, Syncope (medicine), loss of consciousness, and polydipsia, increased thirst. Anemia must be significant before a person becomes noticeably Pallor, pale. Symptoms of anemia depend on how quickly hemoglobin decreases. Additional symptoms may occur depending on the underlying cause. Preoperative anemia can increase the risk of needing a blood transfusion following surgery. Anemia can be temporary or long term and can range from mild to severe. Anemia can be caused by blood loss, dec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dryopteris
:''The moth genus ''Dryopteris'' is now considered a junior synonym of '' Oreta. ''Dryopteris'' , commonly called the wood ferns, male ferns (referring in particular to ''Dryopteris filix-mas''), or buckler ferns, is a fern genus in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). There are about 300-400 species in the genus. The species are distributed in Asia, the Americas, Europe, Africa, and the Pacific islands, with the highest diversity in eastern Asia. It is placed in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Many of the species have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of fronds. The sori are round, with a peltate indusium. The stipes have prominent scales. Hybridization and polyploidy are well-known phenomena in this group, with many species forme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alangium Oregonensis
''Alangium'' is a small genus of flowering plants. The genus is included either in a broad view of the dogwood family Cornaceae, or as the sole member of its own family Alangiaceae.Qiu-Yun (Jenny) Xiang, David T. Thomas, and Qiao Ping Xiang. 2011. "Resolving and dating the phylogeny of Cornales - Effects of taxon sampling, data partitions, and fossil calibrations". ''Molecular Phylogenetics and Evolution'' 59(1):123-138. ''Alangium'' has about 40 species, but some of the species boundaries are not entirely clear.Chun-Miao Feng, Steven R. Manchester, and Qiu-Yun (Jenny) Xiang. 2009. "Phylogeny and biogeography of Alangiaceae (Cornales) inferred from DNA sequences, morphology, and fossils". ''Molecular Phylogenetics and Evolution'' 51(2):201-214. The type species for ''Alangium'' is ''Alangium decapetalum'', which is now treated as a subspecies of ''Alangium salviifolium''.''Alangium'' In: Index Nominum Genericorum. In: Regnum Vegetabile (see ''External links'' below). All of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornaceae
The Cornaceae are a cosmopolitan family of flowering plants in the order Cornales. The family contains approximately 85 species in two genera, ''Alangium'' and ''Cornus''. They are mostly trees and shrubs, which may be deciduous or evergreen, although a few species are perennial herbs. Members of the family usually have opposite or alternate simple leaves, four- or five-parted flowers clustered in inflorescences or pseudanthia, and drupaceous fruits.Kubitzki, K. (2004). Cornaceae. In ''The Families and Genera of Vascular Plants Volume 6: Flowering Plants: Dicotyledons: Celastrales, Oxidales, Rosales, Cornales, Ericales'' (Kubitzki, ed.). Springer-Verlag, New York. The family is primarily distributed in northern temperate regions and tropical Asia. In northern temperate areas, Cornaceae are well known from the dogwoods ''Cornus''. The systematics of Cornaceae has been remarkably unsettled and controversial, and many genera have been added to it and removed from it over time. (One ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alangium Bergensis
''Alangium'' is a small genus of flowering plants. The genus is included either in a broad view of the dogwood family Cornaceae, or as the monotypic taxon, sole member of its own Family (biology), family Alangiaceae.Qiu-Yun (Jenny) Xiang, David T. Thomas, and Qiao Ping Xiang. 2011. "Resolving and dating the phylogeny of Cornales - Effects of taxon sampling, data partitions, and fossil calibrations". ''Molecular Phylogenetics and Evolution'' 59(1):123-138. ''Alangium'' has about 40 species, but some of the species Circumscription (taxonomy), boundaries are not entirely clear.Chun-Miao Feng, Steven R. Manchester, and Qiu-Yun (Jenny) Xiang. 2009. "Phylogeny and biogeography of Alangiaceae (Cornales) inferred from DNA sequences, morphology, and fossils". ''Molecular Phylogenetics and Evolution'' 51(2):201-214. The type species for ''Alangium'' is ''Alangium decapetalum'', which is now treated as a subspecies of ''Alangium salviifolium''.''Alangium'' In: Index Nominum Genericorum. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Milleri Needles 01
Firs (''Abies'') are a genus of 48–56 species of evergreen coniferous trees in the family Pinaceae. They are found on mountains throughout much of North and Central America, Europe, Asia, and North Africa. The genus is most closely related to ''Cedrus'' (cedar). The genus name is derived from the Latin "to rise" in reference to the height of its species. The common English name originates with the Old Norse, fyri, or the Old Danish, fyr. They are large trees, reaching heights of tall with trunk diameters of when mature. Firs can be distinguished from other members of the pine family by the way in which their needle-like leaves are attached singly to the branches with a base resembling a suction cup, and by their cones, which, like those of true cedars, stand upright on the branches like candles and disintegrate at maturity. Identification of the different species is based on the size and arrangement of the leaves, the size and shape of the cones, and whether the bract sca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Valley Formation
The Golden Valley Formation is a stratigraphic unit of Late Paleocene to Early Eocene age in the Williston Basin of North Dakota.Hickey, 1977 It is present in western North Dakota and was named for the city of Golden Valley by W.E. Benson and W.M. Laird in 1947.Benson, W.E. and Liard, W.M. 1947. Eocene of North Dakota. Geological Society of America Bulletin, vol. 60, pp. 1166–1167. It preserves significant assemblages of fossil plants and vertebrates,Jepsen, G.L. 1963. Eocene vertebrates, coprolites, and plants in the Golden Valley Formation of western North Dakota. Geological Society of America Bulletin, vol. 74, pp. 673–684. as well as mollusk and insect fossils. Stratigraphy The Golden Valley Formation is present as a series of outliers in western North Dakota. It is underlain by the Sentinel Butte Formation and unconformably overlain by the White River Group. It reaches thicknesses of up to and is subdivided into two members: the ''Bear Den Member'' (lower) and the ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeogene
The Paleogene ( ; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago ( Mya) to the beginning of the Neogene Period Mya. It is the beginning of the Cenozoic Era of the present Phanerozoic Eon. The earlier term Tertiary Period was used to define the span of time now covered by the Paleogene Period and subsequent Neogene Period; despite no longer being recognised as a formal stratigraphic term, 'Tertiary' is still widely found in earth science literature and remains in informal use. Paleogene is often abbreviated "Pg" (but the United States Geological Survey uses the abbreviation PE for the Paleogene on the Survey's geologic maps). During the Paleogene, mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of the Cretaceous–Paleogene extinction event that ended the preceding C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leo J
Leo or Léo may refer to: Acronyms * Law enforcement officer * Law enforcement organisation * ''Louisville Eccentric Observer'', a free weekly newspaper in Louisville, Kentucky * Michigan Department of Labor and Economic Opportunity Arts and entertainment Music * Leo (band), a Missouri-based rock band that was founded in Cleveland, Ohio * L.E.O. (band), a band by musician Bleu and collaborators Film * ''Leo'' (2000 film), a Spanish film by José Luis Borau * ''Leo'' (2002 film), a British-American drama film * ''Leo'', a 2007 Swedish film by Josef Fares * ''Leo'' (2012 film), a Kenyan film * Leo the Lion (MGM), mascot of the Metro-Goldwyn-Mayer movie studio Television * Leo Awards, a British Columbian television award * "Leo", an episode of ''Being Erica'' * Léo, fictional lion in the animation '' Animal Crackers'' * ''Léo'', 2018 Quebec television series created by Fabien Cloutier Companies * Leo Namibia, former name for the TN Mobile phone network in Namibia * Le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinus Peregrinus
''Pinus peregrinus'' is an extinction, extinct species of pine in the family Pinaceae known from Clarkforkian age Paleocene fossils found in western North Dakota, USA. The species was described from three wing seed specimens found at localities 14051a and 14083 in the Bear Den member of the Golden Valley Formation with associated needles from the Heart River Bluffs area, site 14051a, provisionally assigned to the species also. The Bear Den member outcrops at a number of sites in western North Dakota, and is designated the Type locality (geology), type locality. The holotype specimen, number ''PU 20091'', is preserved in the Princeton University collections, and paratype specimens are in the National Museum of Natural History collections of the Smithsonian Institution. The specimens were studied by paleobotanist Leo J. Hickey of the Yale University, Yale University Geology Department. Dr Hickey published the 1977 Type (biology), type description for ''P. peregrinus'' in the Geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dryopteris Alaskana Syntype USNM 245724
:''The moth genus ''Dryopteris'' is now considered a junior synonym of '' Oreta. ''Dryopteris'' , commonly called the wood ferns, male ferns (referring in particular to ''Dryopteris filix-mas''), or buckler ferns, is a fern genus in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). There are about 300-400 species in the genus. The species are distributed in Asia, the Americas, Europe, Africa, and the Pacific islands, with the highest diversity in eastern Asia. It is placed in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Many of the species have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of fronds. The sori are round, with a peltate indusium. The stipes have prominent scales. Hybridization and polyploidy are well-known phenomena in this group, with many species forme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thelypteridaceae
Thelypteridaceae is a family of about 900 species of ferns in the order Polypodiales. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the suborder Aspleniineae. Alternatively, the family may be submerged in a very broadly defined family Aspleniaceae as the subfamily Thelypteridoideae. The ferns are terrestrial, with the exception of a few which are lithophytes (grow on rocks). The bulk of the species are tropical, although there are a number of temperate species. These ferns typically have creeping rhizomes. The fronds are simply pinnate to pinnate-pinnatifid. There is either no frond dimorphism or only mild dimorphism, either open venation or very simple anastomosing. The sori are mostly reniform in shape and have indusia, except for the ''Phegopteris'' group. Classification During the early and mid 1900's all thelypterioid ferns were included in the genus ''Dryopteris'' because of the sorus shape. However, there are a great many differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_Cornus_sanguinea_-_Inflorescence.jpg "Click for more on -> Cornaceae")
