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

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

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

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

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

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

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

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

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

11 Excavation of Ediacaran bedding surfaces of the Rawnsley Quartzite in

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

13 The Ediacaran biota is the earliest diverse community of mac

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

29 Phosphorites of the Ediacaran Doushantuo Formation ( approximately 600 milli

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

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

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

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

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

35 Sonora extend downward the geologic range of Ediacaran forms.

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

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

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

39 The Ediacaran Gaojiashan biota displays soft-tissue preserva

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

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

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

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

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

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

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

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

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

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

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

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

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

53 glionated cephalic neural systems existed in Ediacaran organisms.

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

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

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

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

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

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

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

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

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

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

64 well before the enhanced oxygenation of the Ediacaran Period.

65 s, was maintained dynamically throughout the Ediacaran Period.

66 composition of carbonate) excursions in the Ediacaran Period.

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

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

69 al elimination of conditions appropriate for Ediacaran preservation.

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

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

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

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

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

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

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

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

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

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

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

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