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Eiffeliidae
Eiffeliidae is an extinct family of sponges. Genera The following genera are placed in the family: * †''Astraeoconus'' Rietschel, 1968 * †''Chilcaia'' Carrera, 1994 * †''Eiffelia'' Charles Doolittle Walcott, Walcott, 1920 (synonyms: ''Lenastella'' Missarzhevsky ''in'' Missarzhevsky & Mambetov, 1981; ''Actinoites'' Duan, 1984; ''Niphadus'' Duan, 1984) * †''Eiffelospongia'' Rigby & Collins, 2004 * †''Gondekia'' Rigby, 1991 * †''Petaloptyon'' Raymond, 1931 (synonyms: ''Canistrumella'' Rigby, 1986) * †''Toquimiella'' Rigby, 1967 * †''Zangerlispongia'' Rigby & Nitecki, 1975 References Prehistoric sponge families {{paleo-sponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demonstrate both monophyly and validity as a separate lineag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eiffelia
''Eiffelia'' is an extinct genus of sponges known from the Middle Cambrian Burgess Shale as well as several Early Cambrian small shelly fossil deposits. It is named after Eiffel Peak, which was itself named after the Eiffel Tower. It was first described in 1920 by Charles Doolittle Walcott. It belongs in the Hexactinellid stem group. 60 specimens of ''Eiffelia'' are known from the Greater Phyllopod bed, where they comprise 0.11% of the community. ''Eiffelia'' generally have star-shaped six-rayed spicules, with rays diverging at 60°, occasionally with a seventh ray perpendicular to the other six. Species Two species are known: * †''Eiffelia globosa'' Walcott, 1920: This species is known from the Middle Cambrian Burgess Shale. In life, it had a globe-like shape and was up to 6 cm in diameter. * †''Eiffelia araniformis'' (Missarzhevsky ''in'' Missarzhevsky & Mambetov, 1981): This species is known from several Early Cambrian small shelly fossil deposits in the Siberian P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eiffelospongia
''Eiffelospongia'' is a genus of sponge known from the Mount Stephen Trilobite Beds The Mount Stephen trilobite beds (UNSM locality 14s) are a series of fossil strata on Mount Stephen, British Columbia that contain exceptionally preserved fossil material. Part of the same stratigraphic unit as the Burgess Shale deposit, many non- .... References External links * Hexactinellida genera Monotypic prehistoric sponge genera Burgess Shale sponges Cambrian genus extinctions Fossil taxa described in 2004 Hexactinellida {{paleo-sponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petaloptyon
''Petaloptyon danei'' is a goblet-shaped hexactinellid sponge known from rare fragments from the Middle Cambrian Burgess Shale. A few specimens of ''Petaloptyon'' are known from the Greater Phyllopod bed The Phyllopod bed, designated by USNM locality number 35k, is the most famous fossil-bearing member of the Burgess Shale fossil ''Lagerstätte''. It was quarried by Charles Walcott from 1911–1917 (and later named Walcott Quarry), and was ..., where they comprise under 0.01% of the community. The fragments show the living animal had a stalk, and had panels with a lattice pattern. References External links Burgess Shale species 100 Burgess Shale sponges Monotypic prehistoric sponge genera Fossil taxa described in 1931 Cambrian genus extinctions {{paleo-sponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sponge
Sponges or sea sponges are primarily marine invertebrates of the animal phylum Porifera (; meaning 'pore bearer'), a basal clade and a sister taxon of the diploblasts. They are sessile filter feeders that are bound to the seabed, and are one of the most ancient members of macrobenthos, with many historical species being important reef-building organisms. Sponges are multicellular organisms consisting of jelly-like mesohyl sandwiched between two thin layers of cells, and usually have tube-like bodies full of pores and channels that allow water to circulate through them. They have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. They do not have complex nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes, usually via flagella movements of the so-called " collar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer Science+Business Media
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin, it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second-largest academic publisher with 65 staff in 1872.Chronology ". Springer Science+Business Media. In 1964, Springer expanded its business internationally, op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
