†family Palaeacidae Roemer 1883 (tabulate coral)
Anthozoa - Favositida - Palaeacidae
Parent taxon: Favositicae according to D. Hill 1981
Sister taxa: Agetolitidae, Cleistoporidae, Favositidae, Micheliniidae, Multisoleniidae, Pseudofavositidae, Syringolitidae, Vaughaniidae
Subtaxa: Microcyathus Palaeacis Smythina
Ecology: stationary epifaunal suspension feeder-photosymbiotic
Distribution: