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Archidermapteron Martynovi
''Archidermapteron martynovi'' ( el, italic=yes, archi=ancient, and ''dermaptera''=skin-wing) is an extinct species of earwig, in the genus ''Archidermapteron'', family Protodiplatyidae, the suborder Archidermaptera, the order Dermaptera, and is the only species in the genus ''Archidermapteron'', which simply means "ancient member of the Dermaptera". It had long, segmented cerci unlike modern species of Dermaptera, but tegmina and hind wings that folded up into a "wing package" that are like modern earwigs. The only clear fossil of the species was found in Russia. Discovery Little is known about how the species was discovered due to the ambiguity of the reports about it, and the fact that only one fossil was ever found. The reason for this is that the environment that most earwigs live in often prevents preservation, because dead organisms in soil and other crevices quickly rot and dissolve away. It is known, however, that the sole fossil of it was found in the early 1900s by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds ( taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Most Recent Common Ancestor
In biology and genetic genealogy, the most recent common ancestor (MRCA), also known as the last common ancestor (LCA) or concestor, of a set of organisms is the most recent individual from which all the organisms of the set are descended. The term is also used in reference to the ancestry of groups of genes ( haplotypes) rather than organisms. The MRCA of a set of individuals can sometimes be determined by referring to an established pedigree. However, in general, it is impossible to identify the exact MRCA of a large set of individuals, but an estimate of the time at which the MRCA lived can often be given. Such ''time to most recent common ancestor'' (''TMRCA'') estimates can be given based on DNA test results and established mutation rates as practiced in genetic genealogy, or by reference to a non-genetic, mathematical model or computer simulation. In organisms using sexual reproduction, the ''matrilineal MRCA'' and ''patrilineal MRCA'' are the MRCAs of a given populati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyly
In taxonomy (general), taxonomy, a group is paraphyletic if it consists of the group's most recent common ancestor, last common ancestor and most of its descendants, excluding a few Monophyly, monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic group (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of Synapomorphy and apomorphy, synapomorphies and symplesiomorphy, symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term was coined by Willi Hennig to apply to well-known taxa like Reptilia (reptiles) which, as commonly named and traditionally defined, is paraphyletic with respect to mammals and birds. Reptilia contains the last common ancestor of reptiles a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monophyly
In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic groups are typically characterised by shared derived characteristics (synapomorphies), which distinguish organisms in the clade from other organisms. An equivalent term is holophyly. The word "mono-phyly" means "one-tribe" in Greek. Monophyly is contrasted with paraphyly and polyphyly as shown in the second diagram. A ''paraphyletic group'' consists of all of the descendants of a common ancestor minus one or more monophyletic groups. A '' polyphyletic group'' is characterized by convergent features or habits of scientific interest (for example, night-active primates, fruit trees, aquatic insects). The features by which a polyphyletic group is differentiated from others are not inherited from a common ancestor. These definitions have take ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filiform
{{disambiguation ...
Filiform, thread or filament like, can refer to: * Filiform, a common term used in botany to describe a thread-like shape *Filiform, or filiform catheter, a medical device whose component parts or segments are all cylindrical and more or less uniform in size * Filiform papilla on the tongue * Insect antennae shape *Thread-like crystal formations *A corrosion mechanism Mechanism may refer to: *Mechanism (engineering), rigid bodies connected by joints in order to accomplish a desired force and/or motion transmission *Mechanism (biology), explaining how a feature is created *Mechanism (philosophy), a theory that a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protodiplatys
''Protodiplatys'' is an extinct genus of earwigs, in the family Protodiplatyidae, the suborder Archidermaptera, and the order Dermaptera. It is known from three species, ''P. fortis'' and ''P. gracilis'', which are known from the Middle-Late Jurassic Karabastau Formation in Kazakhstan, and ''P. mongoliensis'' from the Aptian The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), a ... aged Gurvan-Eren Formation of Mongolia. References Dermaptera genera Prehistoric insect genera {{earwig-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microdiplatys
''Microdiplatys'' is an extinct genus of earwigs, in the family Protodiplatyidae Protodiplatyidae is an extinct family of earwigs. It is one of three families in the suborder Archidermaptera, alongside Dermapteridae and '' Turanovia''. Species are known from Jurassic and Early Cretaceous fossilsFabian HaasArchidermaptera Tre .... It is one of only six genera in the family, its family being the only one in the suborder. Species The genus contains only two known species: * '' Microdiplatys campodeiformis'' * '' Microdiplatys oculatus'' References External links The Tree of Life's article on Archidermaptera Prehistoric insect genera †Microdiplatys Archidermaptera {{earwig-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asiodiplatys
''Asiodiplatys'' is a monotypic genus containing the single species ''Asiodiplatys speciousus'', an extinct species of earwig in the family Protodiplatyidae. It had long and thin cerci that were very different from modern species of Dermaptera, but tegmina and hind wings that folded up into a "wing package" that are like modern earwigs. Like '' Archidermapteron martynovi,'' the only clear fossil of the species was found in Russia. Discovery Like other extinct species of earwig, little is known about how ''Asiodiplatys speciousus'' was discovered due to the ambiguity of the reports about it, and the fact that only one fossil of it was ever found. The reason for this is that the environment that most earwigs live in often prevents preservation, because dead organisms in soil and other crevices quickly rot and dissolve away. It is known, however, that the sole fossil of it was found some time in the early 1900s by a team of Russian entomologists. Characteristics Unlike its re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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