Back to Search Start Over

Parasitic gastropod bioerosion trace fossil on Cenomanian oysters from Le Mans, France and its ichnologic and taphonomic context

Authors :
Nicolas Morel
Max Wisshak
Gérard Breton
Didier Néraudeau
Géosciences Rennes (GR)
Université de Rennes 1 (UR1)
Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS)
Marine Research Department
Senckenberg am Meer
Musée vert, Museum D'histoire Naturelle du Mans
Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)
Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS)
Source :
Acta Palaeontologica Polonica, Acta Palaeontologica Polonica, Polskiej Akademii Nauk, Instytut Paleobiologii, 2017, 62 (1), pp.45-57. ⟨10.4202/app.00304.2016⟩, Acta Palaeontologica Polonica, 2017, 62 (1), pp.45-57. ⟨10.4202/app.00304.2016⟩, Acta palaeontologica Polonica, 62(1):45-57, Acta Palaeontologica Polonica, Vol 62, Iss 1, Pp 45-57 (2017)
Publication Year :
2017
Publisher :
HAL CCSD, 2017.

Abstract

International audience; We describe and name Loxolenichnus stellatocinctus Breton and Wisshak igen. et isp. nov., a bioerosion trace fossil on an Upper Cenomanian oyster from Le Mans (France). This trace is attributed here to a parasitic gastropod. The characteristics of this ichnospecies are a combination of one or several, vertical or oblique, complete penetrations, and an asymmetrical attachment etching (fixichnion) with a diagnostic set of stellate grooves increasingly distinct towards the margin of the trace. By including two former Oichnus ichnospecies, Loxolenichnus halo comb. nov. and Loxolenichnus taddei comb. nov., Oichnus, is now constrained to pure predation traces (praedichnia). The numerous oysters collected from the Marnes à Pycnodonte biauriculata Formation show associated epibionts and encrusters as well as borers and scrapers. Encrusters comprise 24 taxa while bioerosion trace fossils comprise 17 ichnotaxa ranging from very rare (< 0.1%) to quite abundant (81%). The taphonomic history leading to an ex-situ condensation of these oysters is complex. Both the Gnathichnus and Entobia ichnofacies are represented on the shellgrounds, presumably alternatingly.

Details

Language :
English
ISSN :
05677920 and 17322421
Database :
OpenAIRE
Journal :
Acta Palaeontologica Polonica, Acta Palaeontologica Polonica, Polskiej Akademii Nauk, Instytut Paleobiologii, 2017, 62 (1), pp.45-57. ⟨10.4202/app.00304.2016⟩, Acta Palaeontologica Polonica, 2017, 62 (1), pp.45-57. ⟨10.4202/app.00304.2016⟩, Acta palaeontologica Polonica, 62(1):45-57, Acta Palaeontologica Polonica, Vol 62, Iss 1, Pp 45-57 (2017)
Accession number :
edsair.doi.dedup.....c44766da8b1d65b35b0324847fdf319e
Full Text :
https://doi.org/10.4202/app.00304.2016⟩