A 365-Million-Year-Old Freshwater Community Reveals Morphological and Ecological Stasis in Branchiopod Crustaceans
2016 (English)In: Current Biology, ISSN 0960-9822, E-ISSN 1879-0445, Vol. 26, no 3, 383-390 p.Article in journal (Refereed) PublishedText
Univ Paris 06, CNRS, MNHN,CR2P,UMR 7207, Univ Paris 04,Ctr Rech Paleobiodiversite & Paleoe, 57 Rue Cuvier,CP 38, F-75005 Paris, France.;Museum Natl Hist Nat, 57 Rue Cuvier,CP 38, F-75005 Paris, France.;Univ Paris Saclay, IPANEMA, CNRS, Minist Culture & Commun,USR3461, F-91192 Gif Sur Yvette, France.;Synchrotron SOLEIL, BP 48 St Aubin, F-91192 Gif Sur Yvette, France..
Univ Paris 06, Univ Paris 04, MNHN,BOREA,UMR 7208, UCBN,CNRS,IRD,Unite Biol Organismes & Ecosyst Aqu, 57 Rue Cuvier,CP 26, F-75005 Paris, France.;Museum Natl Hist Nat, 57 Rue Cuvier,CP 26, F-75005 Paris, France..
Univ Paris 06, CNRS, MNHN,CR2P,UMR 7207, Univ Paris 04,Ctr Rech Paleobiodiversite & Paleoe, 57 Rue Cuvier,CP 38, F-75005 Paris, France.;Museum Natl Hist Nat, 57 Rue Cuvier,CP 38, F-75005 Paris, France..
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
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  and isolated mandibles preserved as small carbonaceous fossils [4-6] from Canada. The earliest known continental branchiopods are associated with hot spring environments  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 differmorphologically fromtheirmodern 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 . These branchiopods released resting eggs into the sediment in a manner similar to their modern representatives [1, 2]. We infer that this reproductive strategy was critical to overcoming environmental constraints such as seasonal desiccation imposed by living on land. The pioneer colonization of ephemeral freshwater pools by branchiopods in the Devonian was followed by remarkable ecological and morphological stasis that persists to the present day.
Place, publisher, year, edition, pages
2016. Vol. 26, no 3, 383-390 p.
IdentifiersURN: urn:nbn:se:uu:diva-279563DOI: 10.1016/j.cub.2015.12.039ISI: 000369502900031PubMedID: 26776738OAI: oai:DiVA.org:uu-279563DiVA: diva2:908429