Helcionelloida - Helcionellida - Helcionellidae
Alternative spelling: Helcionellinae
Synonym: Eosoconidae Yu 1979
Full reference: W. Wenz. 1938. Handbuch der Paläozoologie; Gastropoda. Handbuch der Paläozoologie 1-240
Parent taxon: Helcionellida according to Y. Oh et al. 2025
See also Bouchet et al. 2005, Ebbestad et al. 2024, Feng et al. 2000, Geyer 1994, Golikov and Starobogatov 1975, Gubanov et al. 2004, Jacquet and Brock 2016, Knight et al. 1960, Kouchinsky et al. 2017, Landing and Bartowski 1996, Landing et al. 2002, Missarzhevsky 1989, Parkhaev 2001, Parkhaev 2002, Parkhaev 2004, Parkhaev and Demidenko 2010, Runnegar and Jell 1976, Wagner 2023, Wahlman 1992 and Wotte 2006
Sister taxa: Coreospiridae, Helcionelloidea, Stenothecidae, Tribelopoma, Yochelcionellidae, Yochelcionelloidea
Subtaxa: Absidaticonus Aegitellus Anabarella Anabaroconus Anhuiconus Anuliconus Asiapatella Asperconella Auricullina Bemella Calyptroconus Capitoconus Chuiliella Cycloholcus Daedalia Davidonia Dorispira Emarginoconus Eocyrtolites Fenqiaronia Figurina Guadalquivirospira Hampilina Hampilininae Helcionella Hispanoconus Hujiagouella Igorella Ilsanella Kuonamkaella Latouchella Lenoconus Leptostega Manasoconus Marocella Minastirithella Miroconulus Nyuella Obtusoconus Oelandia Oelandiella Papilloconus Parapelagiella Pararaconus Paucella Pedrocheotheca Perssuakiella Postacanthella Prosinuites Protowenella Pseudopollicina Randomia Ressericonella Securiconus Tannuella Totoralia Truncatoconus Tuoraconus Yangtzeconinae
Type: Helcionella
Distribution:
• Ordovician of Kazakhstan (3 collections)
• Cambrian to Ordovician of Poland (1)
• Cambrian of Antarctica (9), Australia (136), Canada (23: Alberta, British Columbia, Labrador, New Brunswick, Newfoundland, Newfoundland and Labrador, Nova Scotia, Quebec, Yukon), China (107), Denmark (1), France (2), Germany (7), Greenland (25), Iran (1), Israel (1), Kazakhstan (7), Kyrgyzstan (3), Mexico (3), Mongolia (3), Morocco (6), New Zealand (2), North Korea (1), Norway (3), Poland (1), the Russian Federation (83), South Korea (1), Spain (12), Sweden (4), the United Kingdom (8), United States (39: Idaho, Indiana, Massachusetts, Nevada, New York, Pennsylvania, Tennessee, Utah, Vermont, Virginia)
• Amgan of Canada (1: Alberta), Czechia (1), Denmark (1), Kyrgyzstan (1)
• Solvan of Canada (1: British Columbia), Czechia (1), Kazakhstan (1), Morocco (13), the Russian Federation (3)
• Placentian of Canada (1: Newfoundland and Labrador), United States (1: Massachusetts)
Total: 517 collections including 1084 occurrences