In contrast to most other marine invertebrates, echinoderms favor the recognition of a syn vivo infestment of parasites and commensals by the specific response of their skeletal tissues. Attachment or embedment structures, but also repair features commonly mirror the anatomical morphology of the trace maker and may therefore be of interpretive value. Among the numerous groups of invertebrates associated with sea urchins, only a few are tightly attached to the external surface of the host, leaving visible damage on the skeleton. Here, we describe etched attachment scars, a few millimeters in size, produced by a circular to subcircular organism on the oral surface of the holasteroid echinoid Echinocorys perconica (von Hagenow, 1840 Hagenow, F. von. 1840. Monographie der Rügen'schen Kreideversteinerungen, II. Abteilung. Radiarien und Annulaten. Neues Jahrbuch für Mineralogie, Geognosie und Petrefaktenkunde, 1840: 631–672. [CSA] [Google Scholar]) from the Lower Maastrichtian chalk of northern Germany. We compare the traces with Recent attachment scars produced by benthic foraminifers such as Hyrrokkin sarcophaga and consequently suggest a parasitic foraminifer as the most probable trace maker.