Pelagiellida Mackinnon, 1985

Kouchinsky, Artem, Bengtson, Stefan, Landing, Ed, Steiner, Michael, Vendrasco, Michael & Ziegler, Karen, 2017, Terreneuvian stratigraphy and faunas from the Anabar Uplift, Siberia, Acta Palaeontologica Polonica 62 (2), pp. 311-440 : 345

Order Pelagiellida Mackinnon, 1985

Remarks.—The suprageneric assignment of small gastropod-like shells such as Aldanella and Pelagiella Matthew, 1895 from the early and middle Cambrian is problematical. As summarized by Landing et al. (2002: 299), these forms, typically known from conchs with low spires and laterally to ventrolaterally elongate apertures have been variously regarded as untorted or partially torted “pelagiellid monoplacophorans” (Runnegar 1981) or partially torted “paragastropods” (Linsley and Kier 1984).

Landing et al. (1998, 2002) and Parkhaev (2002) interpreted them as archaeogastropods. Pelagiella was alternatively placed among stem-group gastropods (Thomas et al. 2010) or stem-group molluscs (Thomas and Vinther 2012, but see Dzik and Mazurek 2013) based on finds of associated paired chaetal structures.