Several specimens of trace fossil Bichordites monastiriensis were discovered in two shallow water Oligocene sandstone beds from Valsugana (Trentino, NE Italy) representing the oldest documented occurrence for this ichnospecies. They are grazing−crawling (pascichnion−repichnion) structures and are occasionally associated with enlarged structures that can be interpreted as resting traces (cubichnia) and assigned to the ichnogenus Cardioichnus. The resulting Bichordites–Cardio− ichnus compound trace fossil is here described for the first time. In the basal part of some specimens, skeletal remains of Eupatagus ornatus were found in life position. This founding enables to widen the spectrum of known Bichordites trace− makers. Exceptional conditions of preservation of one specimen extending in two beds recording different environmental conditions gave an opportunity to document the effects of various taphonomical histories on the preservation of this traces.

Bernardi, M.; Boschele, S.; Ferretti, P.; Avanzini, M. (2010). Echinoid burrow Bichordites monastiriensis from the Oligocene of NE Italy. Acta Palaeontologica Polonica: 479-486. doi: doi:10.4202/app.2009.0064

Echinoid burrow Bichordites monastiriensis from the Oligocene of NE Italy

BERNARDI, MASSIMO;FERRETTI, PAOLO;AVANZINI, MARCO
2010-01-01

Abstract

Several specimens of trace fossil Bichordites monastiriensis were discovered in two shallow water Oligocene sandstone beds from Valsugana (Trentino, NE Italy) representing the oldest documented occurrence for this ichnospecies. They are grazing−crawling (pascichnion−repichnion) structures and are occasionally associated with enlarged structures that can be interpreted as resting traces (cubichnia) and assigned to the ichnogenus Cardioichnus. The resulting Bichordites–Cardio− ichnus compound trace fossil is here described for the first time. In the basal part of some specimens, skeletal remains of Eupatagus ornatus were found in life position. This founding enables to widen the spectrum of known Bichordites trace− makers. Exceptional conditions of preservation of one specimen extending in two beds recording different environmental conditions gave an opportunity to document the effects of various taphonomical histories on the preservation of this traces.
Geologia
articolo in rivista
2010
pubblicato
479
486
No
con Impact Factor
si
Bernardi, M.; Boschele, S.; Ferretti, P.; Avanzini, M.
Bernardi, M.; Boschele, S.; Ferretti, P.; Avanzini, M. (2010). Echinoid burrow Bichordites monastiriensis from the Oligocene of NE Italy. Acta Palaeontologica Polonica: 479-486. doi: doi:10.4202/app.2009.0064
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10991/485
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