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1986 In Paleontology
Plants Pinophytes Angiosperms Newly described insects Molluscs Bivalves Fish Dinosaurs Newly named dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Newly named birds Plesiosaurs New taxa Pterosaurs * Fossil jaw fragments containing multicusped teeth were found in Dockum Group rocks in western Texas. One fragment, apparently from a lower jaw, contained two teeth, each with five cusps. Another fragment, from an upper jaw, also contained several multi-cusped teeth. These finds are very similar to the pterosaur genus ''Eudimorphodon'' and may be attributable to this genus, although without better fossil remains it is impossible to be sure.Wellnhofer, Peter (1991). "Summary of Triassic Pterosaurs." ''The Illustrated Encyclopedia of Pterosaurs.'' London, UK: Salamander Books Limited. p. 67. . New taxa Synapsids Mammals References {{portal, Paleontology Paleontology Paleontology (), also spelled palaeontology or palæontology, is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Milleri
''Abies milleri'', an extinct species of fir known from fossil remains found in deposits from the early Eocene Ypresian Stage (stratigraphy), stage (around 49.5 mya) in Washington (U.S. state), Washington State, USA, is the oldest confirmed record for the fir genus. History and classification The species was described from 81 fossil specimens collected from Burke Museum of Natural History and Culture, Burke Museum site number A0307 in Ferry County, Washington. The holotype specimen, number # ''UWBM 31299'', and the eleven paratype specimens are currently deposited in the collections of the Burke Museum in Seattle, where they were studied and described by Howard E. Schorn and Wesley C. Wehr. Schorn and Wehr published their 1986 Type (biology), type description for ''A. milleri'' in the ''Burke Museum of Natural History and Culture, Burke Museum Contributions in Anthropology and Natural History'', Volume 1. The Specific name (botany), specific epithet, ''milleri'', was coined i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecca Group
The Ecca Group is the second of the main subdivisions of the Karoo Supergroup of geological strata in southern Africa. It mainly follows conformably after the Dwyka Group in some sections, but in some localities overlying unconformably over much older basement rocks. It underlies the Beaufort Group in all known outcrops and exposures. Based on stratigraphic position, lithostratigraphic correlation, palynological analyses, and other means of geological dating, the Ecca Group ranges between Early to earliest Middle Permian (Asselian - Roadian) in age. Background During the time of the deposition of the Ecca Group, the depositional environment, with some exceptions, was predominantly marine. The Ecca sea was vast but shallow, reaching only around 500 m at its deepest in its west/northwestern and southern facies where the Tanqua and Laingsburg Depocenters are situated respectively. The marine environment ranged from deep pelagic, submarine fan systems in the lower deposits whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permian
The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic Era. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the region of Perm in Russia. The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the sauropsids ( reptiles). The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these drier conditions, rose to dominance in place of their am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwykaselachus
''Dwykaselachus'' (pronounced dwike-a-selak-us) is an extinct genus of symmoriiform, a cartilaginous fish that lived in what is now South Africa during the Permian period around 280 million years ago. It was first discovered in the 1980s, in a nodule of sediments from the Karoo Supergroup. ''Dwykaselachus'' was named based on Dwyka Group, the group of sedimentary geological formation in the southeastern part of Africa. It represents the place where the type species ''Dwykaselachus oosthuizeni'' was found. Prior to its discovery, symmoriiforms were thought to be related to sharks, in the group Elasmobranchii. However, CT scans of its relatively intact skull showed traits such as brain shape and inner ear structure that are shared with cartilaginous fish from the group Holocephali, which includes Chimaera, chimaeras. This implies that the first major radiation of cartilaginous fish after the Late Devonian extinction, Devonian extinction was in fact holocephalians, rather than shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pojetaia Runnegari
''Pojetaia'' is an extinct genus of early bivalves, one of two genera in the extinct family Fordillidae. The genus is known solely from Early to Middle Cambrian fossils found in North America, Greenland, Europe, North Africa, Asia, and Australia.The Paleobiology Database ''Pojetaia'' entry accessed 4 January 2012 The genus currently contains two accepted species, ''Pojetaia runnegari'', the type species, and ''Pojetaia sarhroensis'', though up to seven species have been proposed. The genera ''Buluniella'', ''Jellia'', and ''Oryzoconcha'' are all considered synonyms of ''Pojetaia''. Description ''Pojetaia'' are small bivalves with[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junior Synonym
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, ''Picea abies''. * In zoology, moving a species from one genus to another results in a different binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved for two names at the same rank that refers to a taxon at that rank - for example, the name ''Papilio prorsa'' Linnaeus, 1758 is a junior synonym of ''Papilio levana'' Linnaeus, 1758, being names for different seasonal forms of the species now referred to as ''Araschnia lev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jellia
''Pojetaia'' is an extinct genus of early bivalves, one of two genera in the extinct family Fordillidae. The genus is known solely from Early to Middle Cambrian fossils found in North America, Greenland, Europe, North Africa, Asia, and Australia.The Paleobiology Database ''Pojetaia'' entry accessed 4 January 2012 The genus currently contains two accepted species, ''Pojetaia runnegari'', the type species, and ''Pojetaia sarhroensis'', though up to seven species have been proposed. The genera ''Buluniella'', ''Jellia'', and ''Oryzoconcha'' are all considered synonyms of ''Pojetaia''. Description ''Pojetaia'' are small bivalves with[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pojetaia
''Pojetaia'' is an extinct genus of early bivalves, one of two genera in the extinct family Fordillidae. The genus is known solely from Early to Middle Cambrian fossils found in North America, Greenland, Europe, North Africa, Asia, and Australia.The Paleobiology Database ''Pojetaia'' entry accessed 4 January 2012 The genus currently contains two accepted species, ''Pojetaia runnegari'', the type species, and ''Pojetaia sarhroensis'', though up to seven species have been proposed. The genera ''Buluniella'', ''Jellia'', and ''Oryzoconcha'' are all considered synonyms of ''Pojetaia''. Description ''Pojetaia'' are small bivalves with |
Early Cambrian
The Cambrian Period ( ; sometimes symbolized Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million years ago (mya) to the beginning of the Ordovician Period mya. Its subdivisions, and its base, are somewhat in flux. The period was established as "Cambrian series" by Adam Sedgwick, who named it after Cambria, the Latin name for 'Cymru' (Wales), where Britain's Cambrian rocks are best exposed. Sedgwick identified the layer as part of his task, along with Roderick Murchison, to subdivide the large "Transition Series", although the two geologists disagreed for a while on the appropriate categorization. The Cambrian is unique in its unusually high proportion of sedimentary deposits, sites of exceptional preservation where "soft" parts of organisms are preserved as well as their more resistant shells. As a result, our understanding of the Cambrian bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nomen Dubium
In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a specimen belongs to that group or not. This may happen if the original type series (i. e. holotype, isotype, syntype or paratype) is lost or destroyed. The zoological and botanical codes allow for a new type specimen, or neotype, to be chosen in this case. A name may also be considered a ''nomen dubium'' if its name-bearing type is fragmentary or lacking important diagnostic features (this is often the case for species known only as fossils). To preserve stability of names, the ''International Code of Zoological Nomenclature'' allows a new type specimen, or neotype, to be chosen for a ''nomen dubium'' in this case. 75.5. Replacement of unidentifiable name-bearing type by a neotype. When an author considers that the taxonomic identity of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buluniella
''Pojetaia'' is an extinct genus of early bivalves, one of two genera in the extinct family Fordillidae. The genus is known solely from Early to Middle Cambrian fossils found in North America, Greenland, Europe, North Africa, Asia, and Australia.The Paleobiology Database ''Pojetaia'' entry accessed 4 January 2012 The genus currently contains two accepted species, ''Pojetaia runnegari'', the type species, and ''Pojetaia sarhroensis'', though up to seven species have been proposed. The genera ''Buluniella'', ''Jellia'', and ''Oryzoconcha'' are all considered synonyms of ''Pojetaia''. Description ''Pojetaia'' are small bivalves with |
