Y-shaped trace fossil (U-shaped upper part with a basal shaft), Parmaichnus stironensis igen. nov. et isp. nov. penetrates from a discontinuity surface cut in Early Quaternary mudstones in the Stirone Valley, Northern Italy. It is attributed to upogebiid decapod crustaceans. Parmaichnus differs from Psilonichnus by the presence of turning chambers in the upper part of the burrow. The turning chambers are considered to be an important taxonomic feature of upogebiid burrows. P. stironensis occurs together with Thalassinoides cf. paradoxicus (produced probably by callianassid crustaceans) and wide U-shaped pyritised cylinders (supposedly produced by balanoglossid hemichordates).
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1 March 2009
A New Y-Shaped Trace Fossil Attributed to Upogebiid Crustaceans from Early Pleistocene of Italy
Peter Pervesler,
Alfred Uchman
Acta Palaeontologica Polonica
Vol. 54 • No. 1
March 2009
Vol. 54 • No. 1
March 2009
crustacean burrows
foredeep
Italy
Parmaichnus
Pleistocene
Psilonichnus
trace fossils