<i>Annulitubus fernandesi</i> sp. n. a new Devonian Annelida tube worm (Pimenteira Formation, Parnaíba Basin, Brazil)

Annelids are relatively rare in the fossil record because they lack a hard skeleton. Here, we report a new occurrence of annelids, Annulitubus fernandesi sp. n. and provide interpretations of its life mode based on taphonomy. The fossils were found both in situ and forming pavements in the upper sandstone beds of the Pimenteira Formation exposed in the city of Picos, Piauí State (Brazil). The pavements with A. fernandesi sp. n. exhibit few taphonomic signatures of transport, characterising a parautochthonous preservation, while the in-situ specimens are vertically oriented. These data corroborate a suspension-feeding, gregarious, sedentary, and infaunal habit for Annulitubus fernandesi sp. n.