A 365-Million-Year-Old Freshwater Community Reveals Morphological and Ecological Stasis in Branchiopod Crustaceans

Current Biology : CB
Pierre GueriauOlivier Béthoux

Abstract

Branchiopod crustaceans are represented by fairy, tadpole, and clam shrimps (Anostraca, Notostraca, Laevicaudata, Spinicaudata), which typically inhabit temporary freshwater bodies, and water fleas (Cladoceromorpha), which live in all kinds of freshwater and occasionally marine environments [1, 2]. The earliest branchiopods occur in the Cambrian, where they are represented by complete body fossils from Sweden such as Rehbachiella kinnekullensis [3] and isolated mandibles preserved as small carbonaceous fossils [4-6] from Canada. The earliest known continental branchiopods are associated with hot spring environments [7] represented by the Early Devonian Rhynie Chert of Scotland (410 million years ago) and include possible stem-group or crown-group Anostraca, Notostraca, and clam shrimps or Cladoceromorpha [8-10], which differ morphologically from their modern counterparts [1, 2, 11]. Here we report the discovery of an ephemeral pool branchiopod community from the 365-million-year-old Strud locality of Belgium. It is characterized by new anostracans and spinicaudatans, closely resembling extant species, and the earliest notostracan, Strudops goldenbergi [12]. These branchiopods released resting eggs into the sediment in a manner ...Continue Reading

References

Jan 30, 2004·Nature·Gaël ClémentPhilippe Janvier
Aug 25, 2010·The New Phytologist·C V RubinsteinP Steemans
Oct 5, 2010·Proceedings of the National Academy of Sciences of the United States of America·Tais W DahlDonald E Canfield
Feb 7, 2012·Proceedings of the National Academy of Sciences of the United States of America·Thomas H P HarveyNicholas J Butterfield
Aug 27, 2013·Molecular Phylogenetics and Evolution·Michael KornAnna K Hundsdoerfer
Feb 28, 2014·The New Phytologist·Charles H Wellman

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Citations

Apr 7, 2018·The Journal of Experimental Biology·Nicolas LessiosJonathan H Cohen
Mar 29, 2020·Royal Society Open Science·Alejandro Izquierdo-López, Jean-Bernard Caron
Feb 29, 2020·Scientific Reports·Clément JauvionSylvain Charbonnier
Dec 13, 2019·Royal Society Open Science·Alejandro Izquierdo-López, Jean-Bernard Caron
May 20, 2020·Science Advances·Qiang OuGeorg Mayer

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