Results 121 to 130 of about 340 (144)
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Some observations on Cloudina, a terminal Proterozoic index fossil from Namibia

Journal of African Earth Sciences, 2001
An overview is provided of past and present concepts about Cloudina, a Neoproterozoic tube-building organism, significant for its early use of biomineralisation. In the past, Cloudina tubes from the Nama limestones of Namibia have had to be studied in thin- or polished sections, but some observations are reported here on silicified tubes extracted ...
exaly   +2 more sources

Taxonomy of the late Ediacaran index fossil Cloudina and a new similar taxon from South China

Precambrian Research, 2017
Abstract Cloudina is a late Ediacaran tubular fossil known from almost every continent. It is typically a mm- to cm-sized conical tube consisting of multiple, nested, funnel-shaped elements, forming the diagnostic “funnel-in-funnel” tube construction.
Yaoping Cai   +2 more
exaly   +2 more sources

Cloudina lucianoi (Beurlen & Sommer, 1957), Tamengo Formation, Ediacaran, Brazil: Taxonomy, analysis of stratigraphic distribution and biostratigraphy

Precambrian Research, 2017
Abstract The genus Cloudina Germs, 1972 includes seven species restricted to Ediacaran strata: 1. Cloudina lucianoi (Beurlen and Sommer, 1957) (Tamengo Formation, Brazil); 2. Cloudina hartmanae Germs, 1972 (Nama Group, Namibia); 3. Cloudina riemkeae Germs, 1972 (Nama Group, Namibia; 4.
Dermeval Aparecido Do Carmo   +2 more
exaly   +2 more sources

Tube growth patterns and microbial mat-related lifestyles in the Ediacaran fossil Cloudina, Gaojiashan Lagerstätte, South China

Gondwana Research, 2014
Abstract Cloudina are important Ediacaran index fossils, as they have a consistent terminal Neoproterozoic age and a worldwide distribution. The morphology of Cloudina has been reconstructed primarily on the basis of three-dimensionally preserved Chinese and Spanish specimens, but questions remain surrounding their phylogenetic placement ...
Yaoping Cai   +2 more
exaly   +2 more sources

New materials reveal Shaanxilithes as a Cloudina-like organism of the late Ediacaran

Precambrian Research, 2021
Abstract Shaanxilithes is a potential index fossil of late Ediacaran for its cosmopolitan occurrences and narrow stratigraphic range. However, its morphology and taxonomy has long been controversial and its biological affinities remain problematic, with interpretations ranging from pogonophorans, sedimentary structures, trace fossils, algae, to ...
Xin Wang   +4 more
openaire   +1 more source

Cloudina-microbial reef resilience to substrate instability in a Cadomian retro-arc basin of the Iberian Peninsula

Precambrian Research, 2020
Abstract The Navalpino anticline of the Central Iberian Zone provides a unique case study of well-exposed late Ediacaran reefs. Drone images show their spatial arrangement as tens of shelly-microbial patch, biohermal and complex reefs encased in a dominantly shaly succession.
Álvaro Blasco, José Javier   +4 more
openaire   +2 more sources

A Reconsideration of the Relationship between the Terminal Ediacaran Conotubus and Cloudina in southern Shaanxi: New Evidence from Geometric Morphometrical Analysis

2023
The late Ediacaran witnessed rapid turnover of organisms. As one of the earliest biomineralizing animal fossils,Cloudina has greatimplication on the evolution of complex macroscopic organisms . With a relatively stable and wide distribution, Cloudina has become one of the most important indicator fossils of the late Ediacaran. Located in the
Jinzhou Luo, Hong Hua, Qiaokun Dai
openaire   +1 more source

Taphonomic and Mineralogic Evidence for an Organic Composition of Ediacaran Cloudina and Sinotubulites

With special tubular and skeletal bauplan, Ediacaran tubular fossils are one unique metazoan group that has irreplaceable significance for our understanding of the early metazoan evoution. However, their biological affinities have long been disputed because of their limited morphological features and ambiguous primary composition.
Xinjie Wang, Ben Yang
openaire   +1 more source

THROWING THE KITCHEN SINK AT CLOUDINA: A REEVALUATION

Geological Society of America Abstracts with Programs, 2022
Tara Selly, James Schiffbauer
openaire   +1 more source

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