منابع مشابه
Ediacaran skeletal metazoan interpreted as a lophophorate
While many skeletal biomineralized genera are described from Ediacaran (635-541 million years ago, Ma) strata, none have been suggested to have an affinity above the Porifera-Cnidaria metazoan grade. Here, we reinterpret the widespread terminal Ediacaran (approx. 550-541 Ma) sessile goblet-shaped Namacalathus as a triploblastic eumetazoan. Namacalathus has a stalked cup with radially symmetrica...
متن کاملMicrobial–metazoan reefs of the terminal Proterozoic Nama
Thrombolite and stromatolite reefs occur at several stratigraphic levels within the terminal Proterozoic Nama Group (c. 550–543 Ma) of central and southern Namibia. The reefs form integral parts of several carbonate platforms within the Nama Group, including the Kuibis platform of the northern Nama Basin (Zaris subbasin), and Huns platform (Witputs subbasin) of the southern Nama Basin. The reef...
متن کاملControls on the evolution of Ediacaran metazoan ecosystems: A redox perspective
A growing number of detailed geochemical studies of Ediacaran (635-541 Ma) marine successions have provided snapshots into the redox environments that played host to the earliest known metazoans. Whilst previous compilations have focused on the global evolution of Ediacaran water column redox chemistry, the inherent heterogeneity evident in palaeogeographically distinct environments demands a m...
متن کاملPalaeoecology: Methods
Paleoecology is based on the documentation of occurrences and abundances of taxa across time and space. Although methodologically similar to the techniques of neontological ecologists, the discipline is distinct in its integration of a deeper time axis into our understanding of the processes shaping the earth’s ecological patterns. Taphonomy is the study of the processes by which organic remain...
متن کاملEdiacaran epifaunal tiering
Epifaunal tiering, the subdivision of vertical space within a community, is a fundamental attribute of Phanerozoic suspension-feeding communities. This paper documents tiering, including the presence of meter-tall organisms, in Neoproterozoic Ediacaran communities. Ediacaran tiering was studied from three exceptionally preserved deep-water communities at Mistaken Point, Newfoundland, which cont...
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ژورنال
عنوان ژورنال: Geological Society, London, Special Publications
سال: 2016
ISSN: 0305-8719,2041-4927
DOI: 10.1144/sp448.1