Type species: Monticulipora frondosa d'Orbigny, 1850
| Synonyms | Author | Type Species |
|---|---|---|
| Dekayella | Ulrich, 1882 | Dekayella obscura Ulrich, 1883 (designation invalid?) |
This genus includes the species:
| Heterotrypa aculeata | Hu, 1986 | Late Ordovician Ashgill | China |
| Heterotrypa affinis | (Ulrich, 1890) | Late Ordovician Ashgill | USA (Illinois) |
| Heterotrypa astrovae | Pushkin, 1976 | Late Ordovician Caradoc | Belarus |
| Heterotrypa compressa | Brood, 1978 | Late Ordovician Ashgill | Sweden Gotland |
| Heterotrypa crassimuralis | (Astrova, 1965) | Middle Ordovician | Arctic Russia |
| Heterotrypa cystata | (Cumings, 1901) | Late Ordovician Ashgill | USA (Indiana) |
| Heterotrypa? dalpiazzi | Vinassa de Regny, 1921 | Late Ordovician | Italy |
| Heterotrypa definita | Dyer, 1925 | Late Ordovician Ashgill | Canada (Ontario) |
| Heterotrypa enormis | Astrova, 1959 | Silurian Ludlovian | Russia |
| Heterotrypa exovaria | Marintsch, 1998 | Middle Ordovician | USA (Tennessee) |
| Heterotrypa extensa | Fan & Hu, 1985 | Late Silurian | China |
| Heterotrypa foliacea | (Ulrich & Bassler, 1904) | Late Ordovician Caradoc | USA (Kentucky) |
| Heterotrypa frondosa | (d'Orbigny, 1850) | Late Ordovician Caradoc | USA (Ohio, Indiana, Kentucky) |
| Heterotrypa georgii | Modzalevskaya, 1968 | Silurian Ludlovian | Russia |
| Heterotrypa? girvanensis | (Nicholson, 1881) | Late Ordovician Caradoc | Scotland |
| Heterotrypa humensis | Ross, 1961 | Silurian | Australia (NSW) |
| Heterotrypa incelebrata | Modzalevskaya, 1968 | Silurian Ludlovian | Russia |
| Heterotrypa incrustans | Pushkin, 1976 | Silurian, Llandovery | Belarus |
| Heterotrypa lata | Kopajevich, 1984 | Late Ordovician Ashgill | Mongolia |
| Heterotrypa magnopora | Boulange, 1964 | Late Ordovician Ashgill | France |
| Heterotrypa magnopora (Homonym) |
Marintsch, 1998 | Middle Ordovician | USA (Tennessee) |
| Heterotrypa meafordensis | Fritz, 1975 | Late Ordovician Ashgill | Canada |
| Heterotrypa? megacanthopora | (Owen, 1960) | Silurian Ludlovian | Wales |
| Heterotrypa microstigma | Cumings & Galloway, 1913 | Late Ordovician Ashgill | USA (Indiana) |
| Heterotrypa obscura | (Ulrich, 1883) | Late Ordovician Caradoc | USA (Ohio) |
| Heterotrypa ovata | Astrova, 1957 | Late Silurian Ludlovian | Russia |
| Heterotrypa pajkhoyensis | (Astrova, 1948) | Middle Ordovician | Russia |
| Heterotrypa parvulipora | Ulrich & Bassler, 1904 | Late Ordovician Caradoc | USA (Tennessee, Kentucky) |
| Heterotrypa patera | Coryell, 1921 | Late Ordovician Caradoc | USA (Tennessee, Alabama) |
| Heterotrypa pauca | Perry, 1962 | Late Ordovician Caradoc | USA (Iowa, Illinois) |
| Heterotrypa paupera | (Ulrich, 1883) | Late Ordovician Caradoc | USA (Ohio) |
| Heterotrypa peripherilata | Fan & Hu, 1985 | Late Silurian | China (Yunnan) |
| Heterotrypa? perplexa | Perry & Hattin, 1960 | Silurian, Wenlockian | USA (Indiana) |
| Heterotrypa pontensis | Ross, 1961 | Early Devonian | Australia (Vic.) |
| Heterotrypa praenuntia | (Ulrich, 1893) | Late Ordovician Caradoc | Estonia, Canada |
| Heterotrypa praenuntia echinata | (Ulrich, 1893) | Late Ordovician Caradoc | USA, Canada |
| Heterotrypa praenuntia multipora | (Ulrich, 1893) | Late Ordovician Caradoc | USA (Minnesota) |
| Heterotrypa praenuntia naevigera | (Ulrich, 1893) | Late Ordovician Caradoc | USA, Estonia |
| Heterotrypa praenuntia simplex | (Ulrich, 1893) | Late Ordovician Caradoc | USA, Estonia |
| Heterotrypa pretiosa | Modzalevskaya, 1968 | Silurian Ludlovian | Russia |
| Heterotrypa qujingensis | Fan & Hu, 1985 | Late Silurian | China (Yunnan) |
| Heterotrypa? ramosa | (Owen, 1960) | Late Silurian Ludlovian | England |
| Heterotrypa rapinae | Pedder, 1971 | Early Devonian Pragian | Australia (NSW) |
| Heterotrypa ridleyana | (Coryell, 1921) | Late Ordovician Caradoc | USA (Tennessee, Alabama) |
| Heterotrypa robusta | Dyer, 1925 | Late Ordovician Ashgill Silurian |
Canada Mongolia |
| Heterotrypa rugosa | Marintsch, 1998 | Middle Ordovician | USA (Tennessee) |
| Heterotrypa semisphaerica | Pushkin, 1976 | Ordovician Llandeilo | Belarus |
| Heterotrypa simplex | Dyer, 1925 | Late Ordovician Ashgill | Canada |
| Heterotrypa simplex maculosa | Dyer, 1925 | Late Ordovician Ashgill | Canada |
| Heterotrypa singularis | Ulrich, 1890 | Late Ordovician Ashgill | USA (Illinois, Wisconsin, Indiana) |
| Heterotrypa sladei | Buttler, 1991 | Late Ordovician Ashgill | Wales |
| Heterotrypa solitaria | Ulrich, 1883 | Late Ordovician Caradoc | USA, Canada |
| Heterotrypa solitaria (Homonym) |
(Dyer, 1925) | Late Ordovician Ashgill | Canada |
| Heterotrypa spinosa | Kopajevich, 1984 | Silurian Landovery-Wenlockian | Mongolia |
| Heterotrypa subfrondosa | (Cumings, 1902) | Late Ordovician Ashgill | USA (Indiana) |
| Heterotrypa subramosa | (Ulrich, 1879) | Late Ordovician Ashgill | USA, Canada |
| Heterotrypa subtrentonensis | Marintsch, 1998 | Middle Ordovician | USA (Tennessee) |
| Heterotrypa taffi | Loeblich, 1942 | Late Ordovician Caradoc | USA (Oklahoma) |
| Heterotrypa tenuis | Astrova, 1959 | Silurian Ludlovian | Russia |
| Heterotrypa trentonensis | (Ulrich, 1883) | Late Ordovician Caradoc | USA, Canada |
| Heterotrypa ulrichi | (Nicholson, 1881) | Late Ordovician Caradoc | USA |
| Heterotrypa undata undulata? |
Stewart, 1922 | Devonian ?Pragian | USA |
| Heterotrypa wilmingtonensis | (Ulrich & Bassler, 1904) | Late Ordovician | USA, Russia, Mongolia |
| Heterotrypa? zubovkaensis | Modzalevskaya, 1968 | Silurian Wenlock | Russia |
This information is based upon various sources, but no personal knowledge. I am indebted to the late Alan Horowitz for his compilation, and to Dr. J. Pachut.
I would be grateful for corrections to, or critical reviews of this information. This is not a 'final' version (an impossible ideal), but a working document.
Dekayella (=Heterotrypa) at University of Georgia.
Dekayella (=Heterotrypa) from Nashville region: at University of Georgia.
Heterotrypa at University of Georgia.
Heterotrypa from Nashville region: at University of Georgia.
Heterotrypa subfrondosa reconstructions at DryDredgers.org.
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