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Abstract
Skeletobionts are important components of most shallow marine ecosystems. Prior to the fossils reported herein, evidence of skeletobionts was absent from Upper Triassic successions on the northwestern margin of Pangaea. The boring Talpina ramosa is reported from bivalve body fossils from the Upper Triassic (Lower Norian) lower Pardonet Formation at Pink Mountain in northeastern British Columbia. This Ichnotaxon penetrates through both the outer and inner surface of articulated and disarticulated bivalve shells preserved within sharp-based event beds. The occurrence of these trace fossils underscores the paucity of borings, bioerosional structures, and encrusting taxa from Triassic successions in the western Pangaean realm. Due to erosional removal of shallow water strata by a post-Triassic unconformity, these event beds provide the only available information regarding the ecological health of Late Triassic depositional systems in the study area.
ACKNOWLEDGMENTS
We gratefully acknowledge Karen Paull, Geological Survey of Canada, for processing the Talpina blocks. As always, Chris McRoberts provided many useful suggestions and reference material. Mike Orchard is also thanked for continuing to provide temporal constraints on the age of our material using conodont biostratigraphy. We also thank Ichnos editors Murray Gingras and George Pemberton, associate editor Jordi de Gibert, and two anonymous reviewers.