| The organism may have extended a filtering organ out of the single opening as a modern serpulid does from its tube. |
| As they grow, the shells may coil or meander over the substrate producing a tube that looks quite similar to a serpulid tube worm shell. |
| They include bivalves, brachiopods, bryozoans, crinoids, gastropods, a possible monoplacophoran, nautiloids and a possible serpulid or microconchid. |
| A gastropod and attached serpulid wormtube from the Pliocene of Cyprus. |
| Attached to the surface are coiled serpulid worm skeletons, muddy or chitinous tube worm casts up to 5 cm long, brittle starfish, and benthic foraminifera. |
