†order Halysitida Sokolov 1947 (tabulate coral)
Parent taxon: Tabulata according to W. Kiessling 2003
Sister taxa: Acaciaporella, Auloporida, Fainella, Favosichaetetes, Favositida, Guizhouchaetetes, Heliolitida, Hemiplasmopora, Kimilites, Kitakamilia, Lichenariida, Liopora, Lipopora, Mirandellidae, Neoroemeriidae, Nitkovicepora, Pachypseudoplasmopora, Plasmadictyon, Pseudoflecteria, Pseudotetradium, Rhacopora, Sarcinulida, Shanxipora, Spirapora, Subcladopora, Sytovaelites, Tetradiida, Victorilites, Yaoxianopora
Subtaxa: none
Ecology: stationary epifaunal suspension feeder-photosymbiotic
Distribution:
• Silurian of Canada (1: New Brunswick collection), United States (1: California)
Total: 2 collections each including a single occurrence