†unranked clade Protoconodonta Landing 1995
Parent taxon: Chaetognatha according to A. Kouchinsky et al. 2011
See also Parkhaev and Demidenko 2010
Sister taxa: Amiskwidae, Eognathacantha, Nectocarididae, Paucijaculum, Protoconodontida, Timorebestia, Titerina
Subtaxa: Amphigeisina Gapparodus Gumella Hagionella Mongolodus Protohertzina
Distribution:
• Cambrian of Australia (2 collections), Canada (4: Newfoundland and Labrador, Nova Scotia), China (87), Denmark (2), India (3), Iran (2), Kazakhstan (22), Kyrgyzstan (2), Mongolia (3), the Russian Federation (11), Sweden (3), the United Kingdom (8)
• Amgan of the Russian Federation (4)
• Solvan of the Russian Federation (4)
Total: 157 collections including 252 occurrences