Lingulata - Acrotretida - Ephippelasmatidae
Parent taxon: Acrotretoidea according to J. Hansen and L. E. Holmer 2011
See also Holmer and Biernat 2002, Popov 2000 and Williams et al. 2000
Sister taxa: Acrothyra, Acrotretidae, Ceratretidae, Craniotreta, Curticiidae, Eoconulidae, Hadrotreta, Scaphelasmatidae, Schizotretoides, Torynelasmatidae, Acrotetidae
Subtaxa: Aipyotreta Akmolina Ephippelasma Ghavidelia Lurgiticoma Mamatia Myotreta Numericoma Pomeraniotreta Rhinotreta Veliseptum
Ecology: stationary epifaunal suspension feeder
Distribution:
• Uhaku of Sweden (6 collections)
• Chazyan of United States (1: Alabama)
• Arenigian of Czechia (1)
• Ordovician of Argentina (4), Australia (1), Estonia (27), Iran (4), Ireland (1), Kazakhstan (3), Norway (15), Poland (1), Sweden (23)
• Cambrian of Kazakhstan (17), New Zealand (2)
Total: 106 collections including 134 occurrences