†order Helcionellida Geyer 1994 (mollusk)

Helcionelloida - Helcionellida

Full reference: G. Geyer. 1994. Middle Cambrian mollusks from Idaho and early conchiferan evolution. New York State Museum Bulletin 481(1):69-86

Parent taxon: Helcionelloida according to S. M. Jacquet and G. A. Brock 2016

See also Geyer 1994, Jacquet et al. 2016 and Wotte 2006

Sister taxa: Beshtashella, Ceratoconidae, Emargimantus, Helcionelliformes, Michniakia, Pelagiellida, Rostroconus

Subtaxa: Coreospiridae Helcionelloidea Tribelopoma Yochelcionelloidea

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Ecology: slow-moving low-level epifaunal detritivore

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