A giant Rusophycus from the Arisaig Group (Siluro-Devonian) of Nova Scotia

A unique specimen of the trace fossil Rusophycus in the Moydart Formation (Ludlow) of the Siluro-Devonlan Arisaig Group of northeastern Nova Scotia la at least 35 cm long, 18 en wide and 8.5 cm deep. The specimen represents the largest Rusophycus yet described and can truly be regarded as a giant. It is speculated that the most likely producer of the trace fossil was a homalonotid trilobite.