The cluster consists of a ring of radiating tubes, likely containing the living individuals, attached to a conical structure interpreted as a float, giving the original fossil the nickname of "Ezekiel's wheel".

Its pterobranch affinity is confirmed by lineations within the tubes, which are traces of fuselli, and the irregular arrangement of these group it with the cephalodiscids.

It is unique in this aspect, as all other known cephalodiscids are benthic and sessile, while the only other planktonic pterobranchs are graptolites, which shows the water column was colonised several times by hemichordates.

Unusually for a planktonic animal, it has only been found in one locality, that being the Bertie Group, however since it was likely soft-bodied, the exceptional preservation of this site may have been necessary for Rotaciurca to fossilise.

[1] Rotaciurca is named in honour of Samuel J. Ciurca, Jr., who donated thousands of eurypterid fossils to the Yale Peabody Museum, alongside the Latin word rota, meaning "wheel".