Type species: Flustra lanceolata Goldfuss, 1826
| Synonyms | Author | Type Species |
|---|---|---|
| Heterodictya | Nicholson, 1875 | Heterodictya gigantea Nicholson, 1875 |
This genus includes the species:
| Hall, 1883 | Silurian Wenlockian | USA Indiana | WoRMS 1407273 | |
| Brood, 1978 | Ordovician Ashgill | Sweden Gotland | WoRMS 1407274 | |
| Billings, 1866 | Ordovician Ashgill | Canada Anticosti Island | WoRMS 1407275 | |
| Lavrentjeva, 1993 | Ordovician | Lithuania | WoRMS 1407276 | |
| McCoy, 1850 | Ordovician Caradoc-Ashgill=Sandbian-Katian | England | WoRMS 1407277 | |
| Portlock, 1843 | Ordovician Ashgill | Ireland | WoRMS 1407278 | |
| Kopajevich, 1975 | Silurian Llandovery | Estonia | WoRMS 1407279 | |
| (Hall, 1852) | Ordovician, Silurian | Canada, USA | WoRMS 1413264 | |
| Ernst, 2007 | Ordovician | India | WoRMS 1407280 | |
| Lavrentjeva, 1993 | Ordovician | Estonia | WoRMS 1407281 | |
| (Hall & Whitfield, 1875) | Silurian Llandovery | USA Ohio | WoRMS 1413265 | |
(Homonym?) |
(Hall, 1883) | Silurian Llandovery | USA Ohio | WoRMS 1413266 |
| Ernst & Key, 2007 | Ordovician Sandbian-Katian | France | WoRMS 1407282 | |
| Eichwald, 1860 | Ordovician Ashgillian | Estonia, Sweden | WoRMS 1407283 | |
| Kopajevich, 1975 | Silurian Wenlockian | Estonia, Sweden | WoRMS 1407284 | |
| Nicholson, 1875 | Ordovician Ashgill=Katian-Hirnantian | USA Ohio | WoRMS 1407285 | |
| Kopajevich, 1975 | Silurian Llandovery | Estonia | WoRMS 1407286 | |
| Weller, 1903 | Silurian Pridoli | USA New Jersey | WoRMS 1407287 | |
| McCoy, 1851 | Ordovician Caradoc=Sandbian-Katian | England | WoRMS 1407288 | |
| (Nicholson, 1875) | Early Devonian Emsian | USA New York | WoRMS 1413267 | |
| Billings, 1866 | Ordovician-Silurian | Canada, Poland, Estonia | WoRMS 1407289 | |
| Owen, 1960 | Silurian Ludlovian | Wales | WoRMS 1407290 | |
| Pushkin, 1990 | Silurian | Belarus | WoRMS 1407291 | |
| Ernst & Carrera, 2012 | Late Ordovician Sandbian | Argentina | WoRMS 1407292 | |
| Vine, 1882 | Silurian Wenlock | England | WoRMS 1407293 | |
| Spjeldnaes, 1985 | Ordovician Ashgill | Sweden | WoRMS 1407294 | |
| (Goldfuss, 1826) | Silurian Llandovery-Wenlock | Netherlands, England, Scotland, Sweden | WoRMS 1413268 | |
| Liu, 1980 | Middle Ordovician | China | WoRMS 1407295 | |
| Safford, 1869 | Ordovician Caradoc=Sandbian-Katian | USA Tennessee | WoRMS 1407296 | |
| (Hall, 1874) | Devonian Lochkovian | USA | WoRMS 1413269 | |
| Billings, 1866 | Ordovician Ashgill | Canada Anticosti Island | WoRMS 1407297 | |
| James, 1879 | Ordovician Ashgill=Katian-Hirnantian | USA Ohio | WoRMS 1407298 | |
| (Ringueberg, 1884) | Silurian Llandovery | USA New York | WoRMS 1413270 | |
| James, 1878 | Ordovician Ashgill=Katian-Hirnantian | USA Ohio | WoRMS 1407299 | |
| Eichwald, 1860 | Ordovician-Silurian | Russia | WoRMS 1407300 | |
| Pushkin, 1976 | Ordovician Ashgillian | Russia, Mongolia | WoRMS 1407301 | |
| (d'Orbigny, 1850) | Silurian Wenlock | England | WoRMS 1413271 | |
| Billings, 1866 | Ordovician Ashgill | Canada Anticosti Island | WoRMS 1407302 | |
| Billings, 1874 | Early Devonian Pragian | Canada | WoRMS 1407303 | |
| Ulrich & Bassler, 1913 | Silurian-Devonian | USA | WoRMS 1407304 | |
| Hennig, 1905 | Silurian Llandovery-Wenlock | Sweden Gotland | WoRMS 1407305 | |
| Nekhoroshev, 1961 | Silurian Llandovery | Russia Siberia | WoRMS 1407306 | |
| Ulrich, 1889 | Ordovician Ashgill | Canada | WoRMS 1407307 | |
| Foerste, 1895 | Silurian Llandovery | USA Ohio | WoRMS 1407308 |