†family Holmophyllidae Wang 1947 (horn coral)
Anthozoa - Cystiphyllida - Holmophyllidae
Parent taxon: Cystiphyllida according to D. Hill 1981
Sister taxa: Cystiphyllidae, Digonophyllidae, Fletcheriidae, Goniophyllidae, Palaeocyclidae, Tryplasmatidae
Subtaxa: Cystiphorolites Dendroholmia Holmophyllum Labechiellata Mazaphyllum Mesouralinia Nipponophyllum Nodophyllum Xiphelasma
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Tajikistan (8 collections), Vietnam (1)
• Silurian to Devonian of Tajikistan (2)
• Silurian of Australia (8), Canada (4: Nunavut, Ontario, Quebec), China (9), Japan (1), the Russian Federation (7), Tajikistan (4), Ukraine (3), United States (1: Alaska)
Total: 48 collections including 61 occurrences