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List Of Ediacaran Genera ...
This is a list of all described Ediacaran genera, including the Ediacaran biota. It contains 227 genera. References {{reflist, 30em * Ediacaran The Ediacaran Period ( ) is a geological period that spans 96 million years from the end of the Cryogenian Period 635 million years ago (Mya), to the beginning of the Cambrian Period 538.8 Mya. It marks the end of the Proterozoic Eon, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. 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 taxonomy (biology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onegia Nenoxa
''Pteridinium'' is an erniettomorph found in a number of Precambrian deposits worldwide. It is a member of the Ediacaran biota. Body plan The three-lobed body is generally flat such that only two lobes are visible. Each lobe consists of a number of parallel ribs extending back to the main axis where the three lobes come together. Even on well-preserved specimens, there is no sign of a mouth, anus, eyes, legs, antennae, or any other appendages or organs. The organism grew primarily by the addition of new units, probably at both ends, with the inflation of existing units contributing little to its growth. Ecology Specimens found in what is thought to be life positions indicate that the creature rested on — or possibly in — the sediment in shallow seas. No tracks are known that would seem to be consistent with a moving ''Pteridinium''. It is unclear whether it performed photosynthesis, or osmotically extracted nutrients from seawater. Occurrence Fossils are common in late Preca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nenoxites
''Nenoxites'' is an extinct genus of Ediacaran ichnofossils described by Mikhail Fedonkin in 1973. The genus is monotypic; the only species to have been described is ''Nenoxites curvus''. Description ''Nenoxites'' is a repichnia trace of soft-bodied bilaterians, similar to a modern day shell-less gastropod. The traces are hypothesized to have been created via locomotive peristalsis, a wave-like constriction and relaxation of muscle resulting in the sinouous pattern and irregular depressions of the fossil. ''Nenoxites'' ichnofossils are thought to be the earliest instance of precambrian bioturbation, a behavior wherein an organism disturbs substrate to find food. The common interpretation of the morphology of ''Nenoxites'' is comparable to traces of contemporary gastropods, and is thought to have been made by the earliest tripoblastic eumetazoans, though there is no current agreed upon taxonomy or biology of ''Nenoxites''. Instances of ''Nenoxites'' have been recorded in the Kh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviculaichnus
''Nenoxites'' is an extinct genus of Ediacaran ichnofossils described by Mikhail Fedonkin in 1973. The genus is monotypic; the only species to have been described is ''Nenoxites curvus''. Description ''Nenoxites'' is a repichnia trace of soft-bodied bilaterians, similar to a modern day shell-less gastropod. The traces are hypothesized to have been created via locomotive peristalsis, a wave-like constriction and relaxation of muscle resulting in the sinouous pattern and irregular depressions of the fossil. ''Nenoxites'' ichnofossils are thought to be the earliest instance of precambrian bioturbation, a behavior wherein an organism disturbs substrate to find food. The common interpretation of the morphology of ''Nenoxites'' is comparable to traces of contemporary gastropods, and is thought to have been made by the earliest tripoblastic eumetazoans, though there is no current agreed upon taxonomy or biology of ''Nenoxites''. Instances of ''Nenoxites'' have been recorded in the Kh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avalofractus
''Avalofractus abaculus'' is a frond-like rangeomorph fossil described from the Ediacaran of the Trepassey Formation, Spaniard's Bay, Newfoundland. Morphology ''Avalofractus'' displays a strongly fractal body shape, with four levels of nearly perfectly self-similar, pinnate, alternate branches. It was about 5 cm long on average, with a 1 cm-diameter holdfast at the base of the frond. The stem length is from 1/3 to 1/2 that of the whole frond. It is quite similar to ''Rangea'', even if with distinct morphological differences that justify the creation of a new genus (e.g. absence of subsidiary quilts, frond elements free to rotate independently instead of being attached to each other by a membrane). Distribution In contrast with other rangeomorphs, which have wide distributions, ''Avalofractus'' seems to have been an endemic species, being known only from the Spaniard's Bay deposits. Reproduction It has been suggested that ''Avalofractus'' could have been capable of ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ausia Fenestrata
''Ausia fenestrata'' is a curious Ediacaran period (630 – 539 million years ago) fossil represented by only one specimen 5 cm long from the Nama Group, a Vendian to Cambrian group of stratigraphic sequences deposited in the Nama foreland basin in central and southern Namibia. It has similarity to ''Burykhia'' from Ediacaran (Vendian) siliciclastic sediments exposed on the Syuzma River of northern Russia. This fossil is of the form of an elongate bag-like sandstone cast (Nama-type preservation) tapering to a cone on one end. The surface of the fossil is covered with oval depressions ("windows") regularly spaced over the surface in the manner of concentric/parallel rows. The taxonomic identity of ''Ausia'' is unresolved. Interpretations * G. Hahn and H. D. Pflug suggested that ''Ausia'' is a pennatulacean coral from the family Veretillidae, but there are no signs of secondary polyps on the fossil, which are nonetheless represented in Hahn and Pflug's reconstruction. No veret ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auroralumina
''Auroralumina'' is a genus of cnidarians from the Ediacaran of Charnwood Forest; the only species is ''Auroralumina attenboroughii''. It is the earliest known animal predator. Fossil Biology The fossil, whose name recalls the Latin for "dawn lantern", has been described as the earliest known animal predator: since its structure places it among the cnidaria, which have stinging cells (cnidocytes) on their tentacles, it is presumed that they used these to catch small planktonic animals. The fossil consists of a pair of bifurcating (forking) tubes in which the animals lived, the earliest such structure to be recorded. It has been dated to 560 million years ago using zircon crystals in the rock. The only species in the genus, ''A. attenboroughii'', is named for the English natural history presenter David Attenborough, who went to school in Leicestershire, where the fossil was found. Phylogeny Phylogenetic analyses recover ''Auroralumina'' as a stem-group medusozoa Medusozo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attenborites
''Attenborites janeae'' is a species of Ediacaran organism from South Australia first described by a team led by Palaeontologist Mary L. Droser in 2018. The genus Attenborites was named after Sir David Attenborough. The bed in which the first 52 specimens from Australia of ''A. janeae'' was given the ARB designation "Alice's Restaurant Bed", and has been given that nickname for its abundance of rare taxa and newly described ones and is also a reference to Arlo Guthrie's 1967 song, "Alice's Restaurant". The new taxon is unique from all of these other taxa in the way that it has a much more irregular morphology than the other 52 specimens. The bed A team of palaeontologists from the University of California led by Mary L. Droser excavated the fossiliferous bed that ''Attenborites'' was described from in 2018. The bed contained a number of unique taxa that also appear in the White Sea of Russia, such as Andiva and Parvancorina. However, common fossils from Nilpena such as Aspidel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atakia
''Atakia'' is a genus of animals that were members of the Ediacaran fauna, which existed from 635 to 541 million years ago. Discovered in Ukraine in 1979 by Palij, the genus ''Atakia'' are soft-bodied Metazoan cast in Vendian sediments found on the Eastern European Platform formations. Oftentimes the genus ''Atakia'' is used as a comparison to other genera, because very little information is known about this genus. There is a discontinuity in identification because the genus '' Fustiglyphus Vialov'' is debated to be the same as ''Atakia'' but found in different regions. Morphology, anatomy, and behavior There is little information on the morphology, anatomy, and behavior on the genus ''Atakia'', but there is a suggestion that ''Fustiglyphus'' may be misidentified to be ''Atakia.'' The two genera are compared with one another in Ivantsov et al., 2018. Within this paper, ''Atakia'' is described as having “disc-shaped casts with an adjoining worm-like body,” while ''Fustiglyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra (genus)
Astra may refer to: People * Astra (name) Places * Astra, Chubut, a village in Argentina * Astra (Isauria), a town of ancient Isauria, now in Turkey * Astra, one suggested name for a hypothetical fifth planet that became the asteroid belt Entertainment * Astra (Marvel Comics), the name of two otherwise unrelated Marvel Comics characters from 1977 and 1999, respectively * Astra (DC Comics) * ''Astra'' (film), a 2012 Bengali film * Australian Subscription Television and Radio Association * ASTRA Awards, annual awards presented by the Australian subscription television industry * Astra, a character in the TV series ''Ultraman Leo'' Music * Astra Chamber Music Society, a Melbourne, Australia concert organization, formed in 1951 * Astra (band), an American psychedelic and progressive rock band * ''Astra'' (album), a 1985 release by Asia * ''Astra'', a 1990 composition by Charles Wuorinen Sports * FC Astra Giurgiu, a Romanian football club, currently playing in Liga I * Astra Kr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspidella
:Aspidella'' is also a homonym for the mushroom genus ''Saproamanita. ''Aspidella'' is an Ediacaran disk-shaped fossil of uncertain affinity. It is known from the single species ''A. terranovica''. Morphology ''Aspidella'' consists of disk-shaped fossils, with concentric rings and/or centripetal rays. The diameter of circular ''Aspidella'' varies from 1 to 180 mm.Peterson. P. 131 Most individuals are between 4 and 10 mm, but smaller individuals would presumably have decayed before they could fossilize. Other ''Aspidella'' take the form of ellipses, 3–8 cm long and 1–4 cm wide. Most have a central pimple. The rim of all specimens is made up by ridge-edged rays and/or concentric rings. Ecology The rarity of large individuals probably indicates that ''Aspidella'' were r-strategists, producing numerous offspring of which most died young. It is most common in deep-water sediments, but is a constituent of most Ediacaran fossil assemblages, including tho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
