Gymnolaemata - Cheilostomata - Umbonulidae
Synonyms: Desmacystidae Dick and Ross 1988, Escharellinidae d'Orbigny 1852, Porellinidae d'Orbigny 1852, Rhamphostomellidae Kluge 1962
Parent taxon: Lepralielloidea according to D. P. Gordon 2012
See also Bassler 1953, Bock 2006, Cheetham 1962, Di Martino and Taylor 2015, Lee et al. 1997 and Pouyet 2000
Sister taxa: Bryocryptellidae, Cheilhorneropsidae, Dhondtiscidae, Eoporella, Hincksiporidae, Jaculinidae, Lepraliellidae, Metrarabdotosidae, Romancheinidae, Sclerodomidae, Sfeniellidae, Tessaradomidae
Subtaxa: Aegyptopora Astochoporella Desmacystis Escharopsis Oshurkovia Posterula Rhamphostomella Scorpiodina Trigonopora Umbonula
Type: Umbonula
Ecology: stationary epifaunal suspension feeder
Distribution:
• Quaternary of Greece (1 collection), Greenland (1), United States (1: California)
• Pliocene of Belgium (1), Jamaica (1), New Zealand (1), Portugal (1)
• Miocene to Oligocene of Australia (6)
• Miocene of Brazil (1), Czechia (13), France (1), Hungary (1), Indonesia (1), Morocco (2), New Zealand (1), Romania (1), Spain (5)
• Oligocene to Miocene of Australia (8)
• Oligocene of United States (5: Alabama, Mississippi)
• Eocene of New Zealand (2), the United Kingdom (2), United States (6: Alabama, Florida)
Total: 62 collections including 74 occurrences