Helcionelloida - Helcionellida - Pelagiellidae
Synonyms: Proeccyliopteridae Kobayashi 1962, Protoscaevogyridae Kobayashi 1962
Full reference: J. B. Knight. 1952. Primitive fossil gastropods and their bearing on gastropod classification. 117(13):1-56
Parent taxon: Helcionellida according to J. O. R. Ebbestad et al. 2024
See also Bouchet et al. 2005, Bouchet et al. 2017, Knight et al. 1960, Landing et al. 2002, Linsley and Kier 1984, Missarzhevsky 1989, Parkhaev 2001, Runnegar 1990, Runnegar and Jell 1976 and Thomas et al. 2020
Sister taxa: Coreospiridae, Helcionelloidea, Tribelopoma, Yochelcionelloidea
Subtaxa: Cambretina Costipelagiella Pelagiella Proeccyliopterus Tannuspira Tianzhushanospira
Type: Pelagiella
Ecology: slow-moving low-level epifaunal detritivore
Distribution:
• Cambrian of Antarctica (10 collections), Australia (67), Canada (12: Newfoundland and Labrador, Nova Scotia, Quebec), China (13), the Czech Republic (2), Germany (4), Greenland (14), India (1), Iran (1), Kyrgyzstan (2), Mexico (2), New Zealand (1), Poland (1), the Russian Federation (22), Spain (5), Svalbard and Jan Mayen (1), Sweden (1), Turkey (1), the United Kingdom (4), United States (30: Georgia, Idaho, Indiana, Massachusetts, Montana, Nevada, Nevada and Utah, New York, Pennsylvania, Utah, Wisconsin)
• Solvan of the Czech Republic (1), Kazakhstan (1), Morocco (5), the Russian Federation (3)
• Amgan of the Russian Federation (2)
• Delamaran of Morocco (2)
• Placentian of United States (3: Massachusetts)
Total: 211 collections including 251 occurrences