Helcionelloida - Pelagiellida

Full reference: R. M. Linsley and W.M. Kier. 1984. The Paragastropoda: a proposal for a new class of Paleozoic Mollusca. Malacologia 25(1):241-254

Parent taxon: Pelagielloidea according to P. Bouchet et al. 2005

Sister taxon: Pelagiellidae

Subtaxa: Aldanella, Barskovia, Nomgoliella, Paraaldanella, Philoxenella

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Ecology: epifaunal grazer