Related Experiment Video
Updated: May 22, 2026

A Whole Mount In Situ Hybridization Method for the Gastropod Mollusc Lymnaea stagnalis
Published on: March 15, 2016
Discovery of White Sea assemblage fossils from Laurentia
Scott D Evans1,2, Erik A Sperling3, Kimberly V Lau4
1Division of Paleontology (Invertebrates), American Museum of Natural History, New York, NY, USA.
Abstract:
The dawn of animal life is preserved by fossils of the Ediacara Biota, which have been separated into three biotic assemblages: the Avalon, White Sea, and Nama. Geographic and temporal isolation of these faunas leads to uncertainties regarding patterns of change. We report the discovery of unambiguous fossil communities belonging to the White Sea assemblage from the paleocontinent of Laurentia in the Blueflower Formation, Mackenzie Mountains, Canada. Unlike previous localities, sedimentological and geochronological evidence supports an older origin and deeper-water setting for this assemblage, including the oldest motile bilaterians. Fossil communities overlap temporally with the Avalon assemblage and are recognized in similar deep-water paleoenvironments. These results provide support for a hypothesized pattern of offshore origination followed by habitation of shallower environments through time, potentially unique to the early radiation of animals.
More Related Videos
09:06Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside
Published on: July 3, 2016
07:30Using Archival Japanese Paper and Thermoplastic Resins to Prepare Fossils for Storage, Display, Transport, and Radiography
Published on: November 14, 2025
Related Concept Videos
Diversity of Protists III
The Fossil Record
Deep Sea Microbial Ecology
Diversity of Archaea III
Diversity of Archaea II
Diversity of Archaea IV