Boring Late Cambrian organisms

Abstract
Specimens of inarticulate brachiopods (family Acrotretdiae) with boreholes were fund in Upper Cambrian carbonates in the southern Great Basin of the USA. Some morphologic features and preferred orientation of the borings are similar to those made by predators and previously reported in the fossil and Holocene record. Such predatory activity in brachiopods is previously unknown in Cambrian rocks. Taxa associated with these specimens are not known to have been predators and identity of the predatory organism is unknown.

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