Polychaeta fossils incertae sedis

Hints, Olle; Paris, Florentin; Al-Hajri, Sa'id. (2015). Late Ordovician scolecodonts from the Qusaiba-1 core hole, central Saudi Arabia, and their paleogeographical affinities. <em>Review of Palaeobotany and Palynology.</em> 212: 85-96.

Parry, L.; Tanner, A.; Vinther, J. (2014). The origin of annelids. <em>Palaeontology.</em> 57(6): 1091-1103.

Parry, Luke A.; Edgecombe, Gregory D.; Eibye-Jacobsen, Danny; Vinther, Jakob. (2016). The impact of fossil data on annelid phylogeny inferred from discrete morphological characters. <em>Proceedings of the Royal Society B: Biological Sciences.</em> 283(1837): 1-9.