Skip to Main content Skip to Navigation
Journal articles

Unellichnus calciforans igen. nov., isp. nov., boring in a Maastrichtian lithified seafloor from the Cotentin (France)

Abstract : The Calcaires à Baculites Fm (Upper Maastrichtian) at Picauville and Cauquigny (Manche) provided more than 70 specimens of a boring showing a hemispherical to irregular chamber, frequently with an horizontal, sometimes stratified, roof. Few thin and rectilinear pipes are connected with the chamber; most are vertical, upwards or downwards, less frequently horizontal or oblique. This trace fossil is described and named Unellichnus calciforans igen. nov., isp. nov. This boring was done after the precocious lithification of the sediment, a bryozoan-rich calcareous sand. The borer remains unidentified: it is seemingly not a sponge, the functional morphology of which appears incompatible with the structure of the trace fossil.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-01200733
Contributor : Isabelle Dubigeon <>
Submitted on : Thursday, September 17, 2015 - 10:00:20 AM
Last modification on : Thursday, January 14, 2021 - 11:43:41 AM

Identifiers

Collections

Citation

Gérard Breton. Unellichnus calciforans igen. nov., isp. nov., boring in a Maastrichtian lithified seafloor from the Cotentin (France). Annales de Paléontologie, Elsevier Masson, 2015, 101 (2), pp.143-151. ⟨10.1016/j.annpal.2015.04.007⟩. ⟨insu-01200733⟩

Share

Metrics

Record views

107