ライフサイエンスコーパス: Ediacaran

1 in of bilaterians at 600-700 Mya (during the Ediacaran).

2 st evidence for animals back into the latest Ediacaran.

3 nequivocal animal fossils first occur in the Ediacaran.

4 ssible control on oceanic oxygenation in the Ediacaran.

5 e persisted since the early Cambrian or late Ediacaran.

6 lity to biomineralize, had deep roots in the Ediacaran.

7 rian diversification were established in the Ediacaran.

8 r, leading to diversity loss in the terminal Ediacaran.

9 Ultralow fields have been reported from Ediacaran (~565 Ma) rocks, but the transition to stronge

10 communities of the Avalon assemblage in the Ediacaran (~565 million years ago).

11 The first animals appear during the late Ediacaran (572 to 541 Ma); an initial diversity increase

12 e of the sedimentary record since the middle Ediacaran ( 580 million years ago).

13 r ecological success of metazoans during the Ediacaran (635 to 541 Ma) and Cambrian (541 to 488 Ma) p

14 glacial Cryogenian (659 to 649 Ma) and early Ediacaran (635 to 590 Ma) age exhibit large positive and

15 Ediacaran (635-542 million years ago) fossils have been

16 of low-diversity, evolutionarily static, pre-Ediacaran acanthomorphs; (ii) radiation of the high-dive

17 Enigmatic macrofossils of late Ediacaran age (580-541 million years ago) provide the ol

18 metazoan-dominated paleocommunities occur in Ediacaran age (~ 565 million years old) strata in Newfou

19 Rocks of Ediacaran age (~635-541 Ma) contain the oldest fossils o

20 of complex macroscopic life are recorded in Ediacaran-aged siliciclastic deposits as exceptionally w

21 st in the origin of streptophytes during the Ediacaran and another in the ancestor of land plants in

22 anerozoic, providing a critical link between Ediacaran and Cambrian animals.

23 establish a phylogenetic connection between Ediacaran and Cambrian metazoans.

24 ificant change in oxygen content through the Ediacaran and Cambrian periods, sharply constraining the

25 SEM images of early biominerals from Ediacaran and Cambrian shelly fossils show that these ea

26 ds leads us to challenge the notion that the Ediacaran and Cambrian worlds were markedly distinct, an

27 ional radiations that extended from the late Ediacaran and continued through the early Palaeozoic.

28 sphere had rapidly emerged during the latest Ediacaran and earliest Cambrian (~20 million years), fol

29 likely to have diverged between the terminal Ediacaran and earliest Cambrian, heralding the exuberant

30 res in diverse animal groups during the late Ediacaran and early Cambrian periods likely resulted fro

31 the early Ediacaran, Eumetazoa in the middle Ediacaran, and Bilateria in the upper Ediacaran, with ma

32 However, fossil bilaterians are rare in the Ediacaran, and no definitive ecdysozoan body fossils are

33 As one of the few Ediacaran animals demonstrated to have produced long and

34 BST deposits from the Ediacaran are rarer and lack conclusive evidence for ani

35 ing that local environments, where a diverse Ediacaran assemblage is preserved in situ as nodules and

36 r tiered specialists, even into the youngest Ediacaran assemblages.

37 acrofossils extending at least into the late Ediacaran at ~571 Ma.

38 sent information on primary producers in the Ediacaran based on biomarker molecules that were extract

39 Comparison with other early Ediacaran basins suggests spatial heterogeneity of eukar

40 Excavation of Ediacaran bedding surfaces of the Rawnsley Quartzite in

41 Arkarua is added to the growing number of Ediacaran benthic suspension feeders, suggesting that th

42 unctional biology, the Dengying form adds to Ediacaran biodiversity, places key constraints on the ec

43 The Ediacaran biota is the earliest diverse community of mac

44 ontroversial interpretation of the enigmatic Ediacaran biota of the late Precambrian as giant protist

45 Although the taxonomic affinities of the Ediacaran biota remain uncertain, a conservative interpr

46 The Ediacaran biota were soft-bodied organisms, many with en

47 fossils are the oldest known remains of the Ediacaran biota.

48 However, redating of key Ediacaran biotas and the discovery of several Ediacaran

49 These data suggest that some Ediacaran biotas were tolerant of at least intermittent

50 Thus, our data support a link between Ediacaran biotic turnover and environmental change, simi

51 nct Ediacaran genera, it is striking that no Ediacaran body fossils have been confidently assigned to

52 Here we report the discovery of a new Ediacaran BST deposit with exceptional preservation of n

53 are present immediately below the top of the Ediacaran but are strikingly absent from the overlying C

54 esent a multi-proxy paleoredox study of late Ediacaran (ca. 560-551 Ma) shales hosting the Miaohe Kon

55 of marine invertebrates associated with the Ediacaran-Cambrian (578-510 Ma) diversification of Metaz

56 four key intervals in marine ecosystems: the Ediacaran-Cambrian (635-485 million years ago), the Ordo

57 eochemical proxy and N isotope record of the Ediacaran-Cambrian boundary preserved in intra-shelf bas

58 her highlight the dynamic redox landscape of Ediacaran-Cambrian evolutionary events.

59 diversifications at scales ranging from the Ediacaran-Cambrian explosion of animal life and the inva

60 he evolutionary events documented during the Ediacaran-Cambrian interval coincide with geochemical ev

61 with many crown-phyla originating across the Ediacaran-Cambrian interval or elsewise fully within the

62 The drivers of Ediacaran-Cambrian metazoan radiations remain unclear, a

63 l as their trace element compositions for an Ediacaran-Cambrian sequence in the Lower Yangtze basin,

64 genome, a history that perhaps began during Ediacaran-Cambrian time but was not completed until the

65 The rise of animals across the Ediacaran-Cambrian transition marked a step-change in th

66 frondose body plans also survive beyond the Ediacaran-Cambrian transition, perhaps due to the greate

67 st views onto the rise of animals across the Ediacaran-Cambrian transition.

68 tages are rare and restricted largely to the Ediacaran-Cambrian, providing direct insight into develo

69 eep-ocean oxygenation occurred in the middle Ediacaran, coinciding with the onset of widespread marin

70 diacaran biotas and the discovery of several Ediacaran crown-Metazoa prompt recalibration of molecula

71 cal redox conditions proposed previously for Ediacaran deep oceans and helps to explain the patchy te

72 These Ediacaran deep-sea fossils were preserved during the inc

73 arbonaceous mudstones/shales of the terminal Ediacaran Dengying Formation in Tongshan, Hubei, South C

74 currences from a comprehensive survey of 720 Ediacaran-Devonian units and show that the establishment

75 As predicted by this hypothesis, the later Ediacaran disappearance of LOEM taxa coincides with geoc

76 ies that there is no simple relation between Ediacaran diversity and the carbon isotopic composition

77 Phosphorites of the Ediacaran Doushantuo Formation ( approximately 600 milli

78 gus-like microfossils preserved in the basal Ediacaran Doushantuo Formation (~635 Ma) in South China.

79 Member IV of the Ediacaran Doushantuo Formation records the recovery from

80 Fluid dynamics modeling of an Ediacaran ecosystem illustrates an important positive fe

81 We investigate Ediacaran ecosystem structure changes over this time per

82 t anoxia played a role in shaping a landmark Ediacaran ecosystem.

83 f distinct microbial communities in the late Ediacaran ecosystems, and suggest that blooms of oxygeni

84 has been invoked as a driving mechanism for Ediacaran environmental change, possibly linked with evo

85 n distinguishes these fossils from other pre-Ediacaran eukaryotes and contributes to growing evidence

86 e hypothesize that the distribution of early Ediacaran eukaryotes likely tracked redox conditions and

87 mate Metazoa to have originated in the early Ediacaran, Eumetazoa in the middle Ediacaran, and Bilate

88 des positive evidence for the absence of pre-Ediacaran eumetazoans and strongly supports the veracity

89 long-term rise of oxygen and restricting the Ediacaran expansion of macroscopic oxygen-demanding anim

90 he first coincides with the emergence of the Ediacaran fauna, including large, motile bilaterian anim

91 Sonora extend downward the geologic range of Ediacaran forms.

92 Here we describe a late-Ediacaran fossil, Helicolocellus cantori gen.

93 This new interpretation of some Ediacaran fossils as large sessile organisms of cool, dr

94 dataset from carbonates that contain in situ Ediacaran fossils from Siberia.

95 emphasizing the pivotal insights provided by Ediacaran fossils in documenting the early evolutionary

96 t from and complementary to that provided by Ediacaran fossils in terminal Proterozoic sandstones and

97 soils, is compatible with observations that Ediacaran fossils were similar in appearance and preserv

98 extant stoloniferous organisms suggests that Ediacaran frondose taxa were likely clonal and resurrect

99 The Ediacaran Gaojiashan biota displays soft-tissue preserva

100 the identification of more than 100 distinct Ediacaran genera, it is striking that no Ediacaran body

101 ions(4-8), the producers of most of the late Ediacaran ichnofossils are unknown, which has resulted i

102 y was already being utilised during the late Ediacaran in the earliest-diverging eumetazoan taxa repr

103 Fossils of the Ediacaran macrobiota (~571-539 mya) record phylogenetica

104 The Ediacaran macrobiota (~574 to 538 million years ago) are

105 and environmentally tolerant members of the Ediacaran macrobiota [6] and dominated deep-marine ecosy

106 oldest and most enigmatic components of the Ediacaran macrobiota.

107 Conventional methods divide Ediacaran macrofossil localities into taxonomically dist

108 ur Re-Os ages suggest that the appearance of Ediacaran macrofossils in northwestern Canada is identic

109 s that were extracted from sediments hosting Ediacaran macrofossils.

110 omputational flow simulations to explore how Ediacaran marine animal forests influenced their surroun

111 Our work suggests that Ediacaran marine animal forests may have contributed to

112 Our results indicate that Ediacaran marine redox chemistry was highly heterogeneou

113 Island Formation that are probably global-an Ediacaran matground ecology, a Fortunian matground/firmg

114 Cloudina is a globally distributed Ediacaran metazoan, with a tubular, funnel-in-funnel for

115 and internal contents with large ornamented Ediacaran microfossils (LOEMs).

116 Interpretation of these distinctive Ediacaran microfossils as resting stages in early metazo

117 This material, along with Ediacaran microfossils containing putative non-biominera

118 Bailey et al. propose that the Ediacaran microfossils Megasphaera and Parapandorina, pr

119 s Shale-type preservation is uncommon in the Ediacaran, mouldic Ediacara-type preservation provides i

120 ritized soft tissue in Namacalathus from the Ediacaran Nama Group, Namibia, which follows the underly

121 ion to the heterogeneous nature of the early Ediacaran nearshore marine environments in which early a

122 ide new insights into the oxygenation of the Ediacaran ocean and the stepwise restructuring of the ca

123 and mechanism of the redox evolution in the Ediacaran ocean are intensely debated.

124 nt a detailed spatial and temporal record of Ediacaran ocean chemistry for the Doushantuo Formation i

125 ntuo Formation in South China to reconstruct Ediacaran oceanic redox conditions.

126 mical evidence support an oxygenation of the Ediacaran oceans (635-542 million years ago), roughly co

127 d States suggest that long-term oxidation of Ediacaran oceans resulted in progressive depletion of a

128 d that only after approximately 551 Ma (when Ediacaran oceans were pervasively oxidized) did evolutio

129 et sp. nov.-from the Ediacaran of Charnwood Forest (557-562 million years ago

130 )(9) Typified by fossil assemblages from the Ediacaran of Mistaken Point, Newfoundland,(8)(,)(10)(,)(

131 is supported by ichnofossils from the latest Ediacaran or early Cambrian left by a plausible nematoid

132 Here we report geochemical data from early Ediacaran organic-rich black shales ( approximately 635-

133 e a previously unrecognized life mode for an Ediacaran organism and arguably the oldest known example

134 The biology of Ediacaran organisms - the oldest fossils of large multic

135 Diverse interpretations of Ediacaran organisms arise not only from their enigmatic

136 The utility of height for the Ediacaran organisms of Mistaken Point.

137 hypotheses and test the redox-sensitivity of Ediacaran organisms, here we present a high-resolution l

138 glionated cephalic neural systems existed in Ediacaran organisms.

139 eport new magnetostratigraphic data from the Ediacaran Ouarzazate Group in the Anti-Atlas Mountains o

140 The data provide evidence for an early Ediacaran oxygenation event, which pre-dates the previou

141 eosols are evidence of a dry, cold temperate Ediacaran palaeoclimate in South Australia.

142 We mapped seven Ediacaran paleocommunities using LiDAR, photogrammetry a

143 Our analysis produces a late Ediacaran paleogeographic reconstruction that is consist

144 establish the feeding mode of the enigmatic Ediacaran pentaradial eukaryote Arkarua.

145 ented by various trace fossils in the latest Ediacaran Period (550-541 Ma), suggesting that the earli

146 d organisms that appear globally in the late Ediacaran Period (575-542 Ma).

147 Strata from the Ediacaran Period (635 million to 538 million years ago [

148 The Ediacaran Period (635 to 541 Ma) marks the global transi

149 The Ediacaran Period (635 to 542 million years ago) was a ti

150 arbonate carbon-isotope excursion during the Ediacaran Period (635 to 542 million years ago), accompa

151 mospheric pO(2) increases by ~50% during the Ediacaran Period (635-541 Ma), reaching ~0.25 of the pre

152 oscopic eukaryotes are rarely older than the Ediacaran Period (635-541 million years (Myr)), and thei

153 he Precambrian period, their record from the Ediacaran period (635-542 million years ago) is controve

154 nt of sedimentary rocks deposited during the Ediacaran Period (635-542 million years ago).

155 marine phosphorus concentrations during the Ediacaran Period (about 635-539 million years ago) has b

156 p, Sultanate of Oman, that cover most of the Ediacaran period (approximately 635 to approximately 548

157 e the fossil of a bilaterian of the terminal Ediacaran period (dating to 551-539 million years ago),

158 The Ediacaran Period (~635-539 Ma) is marked by the emergenc

159 s the rarity of fine-grained deposits in the Ediacaran Period and bridges an important gap between tr

160 f the enigmatic Precambrian organisms in the Ediacaran Period grew large and stood tall above the sea

161 Paleogeography of the Ediacaran Period has remained poorly understood because

162 The fossil record of the terminal Ediacaran Period is typified by the iconic index fossil

163 The Ediacaran Period marks a pivotal time in geodynamo evolu

164 systems that have sustained Metazoa from the Ediacaran Period onward.

165 d in aquatic continental settings during the Ediacaran Period, when complex life co-evolved with a ri

166 his innovation probably occurred in the late Ediacaran period-as evidenced by an abundance of trace f

167 , and biological diversity by the end of the Ediacaran Period.

168 composition of carbonate) excursions in the Ediacaran Period.

169 obligate aerobes, such as animals, until the Ediacaran Period.

170 an alkaline volcanic lake setting during the Ediacaran Period.

171 pole moment 5 times greater than that of the Ediacaran Period.

172 al-grade organisms is found in the preceding Ediacaran Period.

173 st that kinorhynchs may have diverged in the Ediacaran Period.

174 well before the enhanced oxygenation of the Ediacaran Period.

175 s, was maintained dynamically throughout the Ediacaran Period.

176 vide that separates the "Boring Billion" and Ediacaran periods, with the former characterized by a pr

177 rpreted as algal cysts or phycomata, but the Ediacaran populations differ from modern algal analogs i

178 al elimination of conditions appropriate for Ediacaran preservation.

179 ticellular algae diversified well before the Ediacaran radiation of large animals.

180 The branching morphology of Ediacaran rangeomorph fronds has no exact counterpart in

181 first records, to our knowledge, of typical Ediacaran rangeomorph fronds with Burgess Shale-type pre

182 Like some Ediacaran remains, these small, benthic, colonial fossil

183 chemical record provides evidence for a late Ediacaran rise in oxygen, though likely after the origin

184 st fossils of animal-like organisms occur in Ediacaran rocks that are approximately 571 million years

185 24-nbc and 24-secbc in well-preserved early Ediacaran rocks, and the coelution of these compounds wi

186 study describes a fossilized ecdysozoan from Ediacaran rocks, extending the body fossil record for th

187 On this view, the absence of fossil Ediacaran sclerites is evidence against any 'Precambrian

188 lly, delta(238)U values match other terminal Ediacaran sections, indicating widespread marine euxinia

189 gh relative abundance of these biomarkers in Ediacaran sediments from 635-541 million years (Myr) ago

190 prolonged episodes of bottom water anoxia in Ediacaran shelf and platform environments.

191 Fe(carb) of the latest Ediacaran Shibantan limestone in South China, which yiel

192 , cosmopolitan assemblage unique to terminal Ediacaran strata.

193 Here we show that Ediacaran-style matground-based ecology persisted into t

194 ently evolved mineralization during the late Ediacaran through the Ordovician (approximately 550 to 4

195 at may have been present in abundance during Ediacaran times.

196 xtensive trace-fossil record from the latest Ediacaran to Cambrian Age 2, spanning about 20 million y

197 ause of its relatively high abundance in pre-Ediacaran to Early Cambrian sedimentary rocks and oils.

198 illings and repair scars ranging in age from Ediacaran to Holocene).

199 ocean and atmosphere systems during the late Ediacaran to the early Cambrian has been suggested from

200 Delta(13)C(carb-org) occurred from the late Ediacaran to the early Cambrian, suggesting a substantia

201 Analysis of modern animals and Ediacaran trace fossils predicts that the oldest bilater

202 ity of the animals that were responsible for Ediacaran trace fossils.

203 y induced sedimentary structures and typical Ediacaran-type matground ichnofossils.

204 The Ediacaran Weng'an Biota (Doushantuo Formation, 609 Ma ol

205 imate the origins of arthropods to be in the Ediacaran, while most other deep nodes date to the Cambr

206 middle Ediacaran, and Bilateria in the upper Ediacaran, with many crown-phyla originating across the

207 The late Ediacaran witnessed an increase in metazoan diversity an

208 onstraints on depositional conditions of the Ediacaran Yangtze platform that host the earliest animal