User:Paleocemoski/List of synapsids
Appearance
This list of synapsids is a listing of all species that have ever been included in the class Synapsida, excluding class Mammalia.
Number of species
Synapsid groups | Image | Valid species | Junior synonym | Vague status | Rejected as valid taxon | Group totals | ||
---|---|---|---|---|---|---|---|---|
Caseasauria | Caseidae | ![]() |
17 | 1 | 3 | 0 | 21 | |
Eothyrididae | ![]() |
2 | 0 | 0 | 0 | 2 | ||
Eupelycosauria | Edaphosauridae | ![]() |
10 | 15 | 2 | 0 | 27 | |
Sphenacodontia | Sphenacodontidae | ![]() |
20 | 17 | 8 | 0 | 45 | |
Therapsida | ![]() |
? | ? | ? | ? | ? | ||
Other Sphenacodontians | ![]() |
5 | 8 | 0 | 0 | 13 | ||
Unnamed taxon | Ophiacodontidae | ![]() |
13 | 21 | 3 | 1 | 38 | |
Varanopidae | ![]() |
14 | 2 | 2 | 2 | 20 | ||
Other synapsids | ![]() |
0 | 0 | 6 | 0 | 6 | ||
Overall | 81 | 64 | 24 | 3 | 172 |
Caseidae
- The list currently includes 21 species
- 17 are considered valid species
- 1 are considered junior synonym
- 3 are considered either nomina dubia or incertae sedis
Edaphosauridae
- The list currently includes 27 species
- 10 are considered valid species
- 15 are considered junior synonym
- 2 are considered either nomina dubia or incertae sedis
Eothyrididae
- The list currently includes 2 species
- 2 are considered valid species
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Eothyris parkeyi | Romer, 1937 | ![]() |
USA, Texas Belle Plains Formation |
Artinskian | ![]() | ||
Oedaleops campi | Langston, 1965 | ![]() |
USA, New Mexico Abo/Cutler Formation |
Sakmarian | ![]() |
Ophiacodontidae
- The list currently includes 38 species
- 13 are considered valid species
- 21 are considered junior synonym
- 3 are considered either nomina dubia or incertae sedis
- 1 are considered invalid species
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Archaeobelus vellicatus | Cope 1877 | ![]() |
Synonym of Clepsydrops vinslovii | USA, Illinois Bond Formation |
Kasimovian | ||
Archaeothyris florensis | Reisz, 1972 | ![]() |
Canada, Nova Scotia Morien Group |
Kasimovian | ![]() | ||
Arribasaurus navajovicus | Williston, 1914 | Dimetrodon navajovicus | ![]() |
Synonym of Ophiacodon navajovicus | USA, New Mexico Abo/Cutler Formation |
Asselian | |
Baldwinonus dunkardensis | Romer, 1952 | ![]() |
USA, Ohio Washington Formation |
Asselian | |||
Baldwinonus trux | Romer & Price, 1940 | ![]() |
USA, New Mexico Abo/Cutler Formation |
Asselian | |||
Clepsydrops collettii | Cope, 1875 | Archaeobelus vellicatus Clepsydrops pedunculatus |
![]() |
USA, Illinois Bond Formation |
Kasimovian | ||
Clepsydrops gigas | Cope, 1878 | ![]() |
Synonym of Dimetrodon gigas | ||||
Clepsydrops leptocephalus | Cope, 1884 | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | ||
Clepsydrops limbatus | Cope, 1877 | ![]() |
Synonym of Dimetrodon limbatus | ||||
Clepsydrops macrospondylus | Cope 1884 | ![]() |
Synonym of Dimetrodon macrospondylus | ||||
Clepsydrops magnus | Romer 1961 | ![]() |
Possible synonym of Ophiacodon | USA, Pennsylvania |
Kasimovian or Gzhelian | ||
Clepsydrops natalis | Cope, 1878 | ![]() |
Synonym of Dimetrodon natalis | ||||
Clepsydrops pedunculatus | Cope 1877 | ![]() |
Synonym of Clepsydrops collettii | USA, Illinois Bond Formation |
Kasimovian | ||
Clepsydrops vinslovii | Cope, 1877 | Captorhinus illinoisensis (?) | ![]() |
Possible synonym of Clepsydrops collettii | USA, Illinois Bond Formation |
Kasimovian | |
Diopeus leptocephalus | Cope, 1884 | Clepsydrops leptocephalus | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | |
Ophiacodon beckiae | Wilson, 1989 | ![]() |
Nomen vanum | USA, Kansas | Late Carboniferous | ||
Ophiacodon hilli | Romer and Price 1940 | Winfeldia hilli | ![]() |
USA, Kansas Barneston Limestone Formation |
Sakmarian | ||
Ophiacodon major | Romer and Price 1940 | ![]() |
USA, Texas Waggoner Ranch Formation |
Kungurian | |||
Ophiacodon mirus | Marsh, 1878 | ![]() |
USA, New Mexico Abo/Cutler Formation |
Asselian | ![]() | ||
Ophiacodon navajovicus | Romer & Price, 1940 | Arribasaurus navajovicus Dimetrodon navajovicus |
![]() |
USA, New Mexico Abo/Cutler Formation |
Asselian | ||
Ophiacodon retroversus | Romer & Price, 1940 | Clepsydrops leptocephalus Diopeus leptocephalus Ophiacodon triangulata Ophiacodon watsoni Theropleura retroversus Theropleura trianagulata Therosaurus watsoni |
![]() |
USA, Texas Nocona Formation |
Kungurian | ![]() | |
Ophiacodon triangulata | (?) | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | ||
Ophiacodon uniformis | Romer & Price, 1940 | Poliosaurus uniformis Theropleura uniformis |
![]() |
USA, Texas Putnam Formation |
Sakmarian | ||
Ophiacodon watsoni | (?) | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | ||
Poecilospondylus francisi | Case 1910 | ![]() |
Synonym of Varanosaurus acutirostris | USA, Texas Arroyo Formation |
Kungurian | ||
Poliosaurus uniformis | Case, 1907 | Theropleura uniformis | ![]() |
Synonym of Ophiacodon uniformis | USA, Texas Putnam Formation |
Sakmarian | |
Stereophallodon ciscoensis | Romer, 1937 | ![]() |
USA, Texas Pueblo Formation |
Asselian | |||
Stereorhachis dominans | Gaudry, 1880 | ![]() |
France, Saone-et Loire | Gzhelian | |||
Theropleura grandis | Case, 1907 | ![]() |
Synonym of Dimetrodon grandis | USA, Texas Arroyo Formation |
Kungurian | ||
Theropleura obtusidens | Cope, 1880 | ![]() |
Synonym of Secodontosaurus obtusidens | USA, Texas Nocona Formation |
Artinskian | ||
Theropleura retroversus | Cope, 1878 | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | ||
Theropleura trianagulata | Cope, 1878 | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | ||
Theropleura uniformis | Cope, 1878 | ![]() |
Synonym of Ophiacodon uniformis | USA, Texas Putnam Formation |
Sakmarian | ||
Therosaurus watsoni | Huene, 1925 | ![]() |
Synonym of Ophiacodon retroversus | USA, Texas Nocona Formation |
Kungurian | ||
Varanosaurus acutirostris | Broili 1904 | Poecilospondylus francisi | ![]() |
USA, Texas Arroyo Formation |
Kungurian | ![]() | |
Varanosaurus brevirostris | Williston, 1911 | ![]() |
Synonym of Varanops brevirostris | USA, Texas Arroyo Formation |
Kungurian | ||
Varanosaurus wichitaensis | Romer 1937 | ![]() |
USA, Texas Belle Plains Formation |
Kungurian | |||
Winfeldia hilli | Romer, 1925 | ![]() |
Synonym of Ophiacodon hilli | USA, Kansas Barneston Limestone Formation |
Sakmarian |
Sphenacodontia
Sphenacodontidae
- The list currently includes 45 species
- 20 are considered valid species
- 17 are considered junior synonym
- 8 are considered either nomina dubia or incertae sedis
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Bathyglyptus theodori | Case, 1911 | ![]() |
Synonym of Dimetrodon grandis | USA, Texas Arroyo Formation |
Kungurian | ||
Bathygnathus borealis | Leidy, 1854 | ![]() |
Poorly known | Canada, Prince Edward Island Orby Head Formation |
Artinskian | ![]() | |
Cryptovenator hirschbergeri | Fröbisch, Schoch, Müller, Schindler & Schweiss, 2011 | ![]() |
Germany, Rineland Palatinate Remigiusberg Formation |
Gzhelian | |||
Ctenorhachis jacksoni | Hook & Hotton, 1991 | ![]() |
USA, Texas Nocona Formation Belle Plains Formation |
Artinskian to Kungurian | ![]() | ||
Ctenospondylus casei | Romer, 1936 | ![]() |
USA, Texas Belle Plains Formation USA, Utah Cutler Formation |
Sakmarian to Kungurian | ![]() | ||
Ctenospondylus ninevehensis | Berman, 1978 | ![]() |
USA, Ohio Greene Formation |
Sakmarian | |||
Cutleria wilmarthi | Lewis & Vaughn, 1965 | ![]() |
Incertae sedis (basalmost sphenacodontid or derived stem-sphenacodontoid) |
USA, Colorado Cutler Formation |
Asselian to Sakmarian | ![]() | |
Dimetrodon angelensis | Olson, 1962 | Eosyodon hudsoni | ![]() |
USA, Texas San Angelo Formation |
Kungurian | ![]() | |
Dimetrodon booneorum | Romer, 1937 | ![]() |
USA, Texas Nocona Formation Petrolia Formation |
Artinskian to Kungurian | |||
Dimetrodon cruciger | Cope, 1878 | ![]() |
Synonym of Edaphosaurus cruciger | USA, Texas | Kungurian | ||
Dimetrodon dollovianus | Case, 1907 | Embolophorus dollovianus | ![]() |
USA, Oklahoma Waggoner Ranch Formation USA, Texas Petrolia Formation Arroyo Formation |
Artinskian to Kungurian | ||
Dimetrodon fritillus | Cope, 1878 | ![]() |
Synonym of Embolophorus fritillus | USA, Texas | Early Permian | ||
Dimetrodon giganhomogenes | Case, 1907 | ![]() |
USA, Texas Arroyo Formation Choza Formation Vale Formation USA, Oklahoma Willington Formation |
Kungurian | ![]() | ||
Dimetrodon gigas | Cope, 1878 | Clepsydrops gigas | ![]() |
Synonym of Dimetrodon grandis | USA, Texas Arroyo Formation |
Kungurian | |
Dimetrodon grandis | Romer and Price, 1940 | Bathyglyptus theodori Clepsydrops gigas Dimetrodon gigas Dimetrodon maximus Theropleura grandis |
![]() |
USA, Texas Arroyo Formation Vale Formation USA, Oklahoma Waggoner Ranch Formation Wellington Formation |
Kungurian | ![]() | |
Dimetrodon incisivus | Cope, 1878 | ![]() |
Synonym of Dimetrodon limbatus | USA, Texas Nocona Formation Petrolia Formation |
Artinskian to Kungurian | ||
Dimetrodon kempae | Romer, 1937 | ![]() |
Possible nomen dubium | USA, Texas Arroyo Formation |
Kungurian | ||
Dimetrodon limbatus | Romer and Price, 1940 | Clepsydrops limbatus Dimetrodon incisivus Dimetrodon rectiformis Dimetrodon semiradicatus |
![]() |
USA, Texas Nocona Formation Petrolia Formation USA, Oklahoma Garber Sandstone Wellington Formation USA, New Mexico Abo Formation |
Artinskian to Kungurian | ||
Dimetrodon longiramus | Case, 1907 | ![]() |
Synonym of Secodontosaurus obtusidens | USA, Texas Nocona Formation |
Artinskian | ||
Dimetrodon loomisi | Romer, 1937 | ![]() |
USA, Texas Arroyo Formation |
Kungurian | ![]() | ||
Dimetrodon macrospondylus | Case, 1907 | Clepsydrops macrospondylus Dimetrodon platycentrus |
![]() |
USA, Texas Petrolia Formation USA, Oklahoma Waggoner Ranch Formation |
Kungurian | ||
Dimetrodon maximus | Romer, 1936 | ![]() |
Synonym of Dimetrodon grandis | USA, Texas | Kungurian | ||
Dimetrodon milleri | Romer, 1937 | ![]() |
USA, Texas Archer City Formation USA, New Mexico Bursum Formation |
Gzhelian to Artinskian | ![]() | ||
Dimetrodon natalis | Romer, 1936 | Clepsydrops natalis | ![]() |
USA, Texas Archer City Formation Nocona Formation Petrolia Formation |
Artinskian to Kungurian | ![]() | |
Dimetrodon obtusidens | Case, 1907 | Theropleura obtusidens | ![]() |
Synonym of Secodontosaurus obtusidens | USA, Texas Nocona Formation |
Artinskian | |
Dimetrodon occidentalis | Berman, 1977 | ![]() |
USA, New Mexico Abo Formation El Cobre Canyon Formation |
Asselian to Sakmarian | |||
Dimetrodon platycentrus | Case, 1907 | ![]() |
Synonym of Dimetrodon macrospondylus | USA, Oklahoma Waggoner Ranch Formation |
Kungurian | ||
Dimetrodon rectiformis | Cope, 1878 | ![]() |
Synonym of Dimetrodon limbatus | USA, Texas Nocona Formation |
Artinskian | ||
Dimetrodon semiradicatus | Cope, 1881 | ![]() |
Synonym of Dimetrodon limbatus | USA, Texas Nocona Formation |
Artinskian | ||
Dimetrodon teutonis | Berman, 2001 | ![]() |
Germany, Thuringia Tambach Formation |
Artinskian | |||
Elcabrosaurus baldwini | Case, 1907 | ![]() |
Synonym of Sphenacodon ferox | USA, New Mexico El Cobre Canyon Formation |
Asselian | ||
Embolophorus dollovianus | Cope, 1888 | ![]() |
Synonym of Dimetrodon dollovianus | USA, Oklahoma Waggoner Ranch Formation |
Kungurian | ||
Embolophorus fritillus | Cope, 1878 | ![]() |
USA, Texas | Early Permian | |||
Eosyodon hudsoni | Olson, 1962 | ![]() |
Synonym of Dimetrodon angelensis | USA, Texas San Angelo Formation |
Kungurian | ||
Macromerion schwartzenbergii | Fritsch, 1879 | ![]() |
Poorly known | Czech Republic, Kounová | Gzhelian | ||
Neosaurus cynodus | Nopsca, 1923 | Geosaurus cynodus (?) Stereorachis cynodus (?) |
![]() |
Poorly known | France, Jura Walchia Beds |
Asselian | |
Oxyodon britannicus | Huene, 1908 | ![]() |
Synonym of Sphenacodon britannicus | UK, England Kenilworth Sandstone Formation |
Asselian | ||
Scoliomus puercensis | Williston and Case, 1913 | ![]() |
Synonym of Sphenacodon ferox | USA, New Mexico Abo/Cutler Formation |
Asselian | ||
Secodontosaurus longiramus | Case 1907 | Dimetrodon longiramus | ![]() |
Synonym of Secodontosaurus obtusidens | USA, Texas Nocona Formation |
Artinskian | |
Secodontosaurus obtusidens | Romer, 1936 | Dimetrodon longiramus Dimetrodon obtusidens Secodontosaurus longiramus Theropleura obtusidens |
![]() |
USA, Texas Nocona Formation Belle Plains Formation |
Artinskian to Kungurian | ![]() | |
Secodontosaurus willistoni | Romer, 1936 | ![]() |
USA, Texas Arroyo Formation |
Kungurian | |||
Sphenacodon britannicus | Paton, 1974 | Oxyodon britannicus | ![]() |
Incertae sedis | UK, England Kenilworth Sandstone Formation |
Asselian | |
Sphenacodon ferocior | Romer, 1937 | ![]() |
USA, New Mexico Abo/Cutler Formation El Cobre Canyon Formation USA, Utah Cutler Formation |
Asselian to Sakmarian | ![]() | ||
Sphenacodon ferox | Marsh, 1878 | Elcabrosaurus baldwini Scoliomus puercensis |
![]() |
USA, New Mexico Abo/Cutler Formation El Cobre Canyon Formation |
Asselian to Sakmarian | ||
Steppesaurus gurleyi | Olson & Beerbower, 1953 | ![]() |
Poorly known | USA, Texas San Angelo Formation |
Kungurian | ![]() |
Therapsida
- The list currently includes ? species
- ? are considered valid species
- ? are considered junior synonym
- ? are considered either nomina dubia or incertae sedis
- ? are considered invalid species
Other sphenacodontians
- The list currently includes 13 species
- 5 are considered valid species
- 8 are considered junior synonym
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Callibrachion gaudryi | Boule & Glangeau, 1893 | ![]() |
Synonym of Haptodus baylei | France, Saone-et Loire Millery Formation |
Asselian | ||
Datheosaurus macrourus | Schroeder, 1905 | ![]() |
Synonym of Haptodus baylei | Poland, Silesia Ludwikowice Formation |
Gzhelian | ||
Datheosaurus saxonicus | Huene, 1925 | ![]() |
Synonym of Pantelosaurus saxonicus | Germany, Saxony Döhlen Formation |
Asselian | ||
Haptodus baylei | Gaudry, 1886 | Callibrachion gaudryi Datheosaurus macrourus Haptodus gaudryi Haptodus macrourus |
![]() |
Poland, Silesia Ludwikowice Formation France, Saone-et Loire Millery Formation |
Gzhelian to Asselian | ||
Haptodus garnettensis | Currie, 1977 | ![]() |
USA, Kansas Stanton Formation |
Kasimovian | ![]() | ||
Haptodus gaudryi | Romer & Price, 1940 | Callibrachion gaudryi | ![]() |
Synonym of Haptodus baylei | France, Saone-et Loire Millery Formation |
Asselian | |
Haptodus grandis | Paton, 1974 | ![]() |
UK, England Kenilworth Sandstone Formation |
Asselian | |||
Haptodus longicaudata | Romer & Price, 1940 | ![]() |
Synonym of Palaeohatteria longicaudata | Germany, Saxony Niederhäslich-Schweinsdorf Formation |
Sakmarian | ||
Haptodus macrourus | Romer & Price, 1940 | Datheosaurus macrourus | ![]() |
Synonym of Haptodus baylei | Poland, Silesia Ludwikowice Formation |
Gzhelian | |
Haptodus saxonicus | Romer & Price, 1940 | ![]() |
Synonym of Pantelosaurus saxonicus | Germany, Saxony Döhlen Formation |
Asselian | ||
Palaeohatteria longicaudata | Credner, 1888 | Haptodus longicaudata Palaeosphenodon longicaudata |
![]() |
Germany, Saxony Niederhäslich-Schweinsdorf Formation |
Sakmarian | ![]() | |
Palaeosphenodon longicaudata | Baur, 1889 | ![]() |
Synonym of Palaeohatteria longicaudata | Germany, Saxony Niederhäslich-Schweinsdorf Formation |
Sakmarian | ||
Pantelosaurus saxonicus | Huene, 1925 | Datheosaurus saxonicus Haptodus saxonicus |
![]() |
Germany, Saxony Döhlen Formation |
Asselian | ![]() |
Varanopidae
- The list currently includes 20 species
- 14 are considered valid species
- 2 are considered junior synonym
- 2 are considered either nomina dubia or incertae sedis
- 2 are considered invalid species
Mycterosaurinae
- The list currently includes 9 species
- 4 are considered valid species
- 2 are considered junior synonym
- 1 are considered either nomina dubia or incertae sedis
- 2 are considered invalid species
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Basicranodon fortsillensis | Vaughn, 1958 | ![]() |
Synonym of Mycterosaurus longiceps | USA, Oklahoma Garber Formation |
Artinskian | ||
Elliotsmithia longiceps | Broom, 1937 | ![]() |
South Africa, Western Cape Tapinocephalus Assemblage Zone |
Capitanian | |||
Eumatthevia bolli | Broom, 1930 | ![]() |
Synonym of Mycterosaurus longiceps | USA, Texas Waggoner Ranch Formation |
Artinskian | ||
Heleosaurus scholtzi | Broom, 1907 | Heliosaurus | ![]() |
South Africa, Northern Cape Tapinocephalus Assemblage Zone |
Capitanian | ![]() | |
Heliosaurus sp. | Huene, 1956 | ![]() |
Sic (Heleosaurus) | South Africa, Northern Cape Tapinocephalus Assemblage Zone |
Capitanian | ||
Mesenosaurus romeri | Efremov, 1938 | Mesonosaurus | ![]() |
Russia, Arkhangelsk Krasnoshchel' Formation |
Wordian to Capitanian | ||
Mesonosaurus sp. | Ivakhenko & Kurzanov, 1979 | ![]() |
Sic (Mesenosaurus) | Russia, Arkhangelsk Krasnoshchel' Formation |
Wordian to Capitanian | ||
Mycterosaurus longiceps | Williston, 1915 | Basicranodon fortsillensis Eumatthevia bolli |
![]() |
USA, Oklahoma Garber Formation USA, Texas Waggoner Ranch Formation |
Artinskian | ![]() | |
Mycterosaurus smithae | Lewis & Vaughn, 1965 | ![]() |
USA, Colorado Cutler Formation |
Asselian |
Varanopinae
- The list currently includes 7 species
- 7 are considered valid species
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Aerosaurus greenleeorum | Romer, 1937 | ![]() |
USA, New Mexico Abo/Cutler Formation |
Asselian | |||
Aerosaurus wellesi | Langston & Reisz, 1981 | ![]() |
USA, New Mexico Abo/Cutler Formation |
Asselian | ![]() | ||
Ruthiromia elcobriensis | Eberth & Brinkman, 1983 | ![]() |
USA, New Mexico Abo/Cutler Formation |
Asselian | |||
Tambacarnifex unguifalcatus | Berman, Henrici, Sumida, Martens & Pelletier, 2014 | ![]() |
Germany, Thuringia Tambach Formation |
Artinskian | |||
Varanodon agilis | Olson, 1965 | ![]() |
USA, Oklahoma Chickasha Formation |
Roadian | ![]() | ||
Varanops brevirostris | Williston, 1911 | Varanosaurus brevirostris | ![]() |
USA, Oklahoma Garber Formation USA, Texas Arroyo Formation |
Artinskian to Kungurian | ![]() | |
Watongia meieri | Olson, 1974 | ![]() |
USA, Oklahoma Chickasha Formation |
Roadian |
Other Varanopids
- The list currently includes 4 species
- 3 are considered valid species
- 1 are considered either nomina dubia or incertae sedis
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Apsisaurus witteri | Laurin, 1991 | ![]() |
Basal | USA, Texas Putnam Formation |
Asselian | ![]() | |
Archaeovenator hamiltonensis | Reisz & Dilkes, 2003 | ![]() |
Basal | USA, Kansas Calhoun Shale |
Gzhelian | ![]() | |
Pyozia mesenensis | Anderson & Reisz, 2004 | ![]() |
Basal | Russia, Arkhangelsk Krasnoshchel' Formation |
Capitanian | ||
Thrausmosaurus serratidens | Fox, 1962 | ![]() |
Nomen dubium | USA, Oklahoma Garber Formation |
Artinskian |
Other synapsids
- The list currently includes 6 species
- 6 are considered either nomina dubia or incertae sedis
Species | Authority | Synonyms | Status | Notes | Location | Age | Images |
---|---|---|---|---|---|---|---|
Echinerpeton intermedium | Reisz, 1972 | ![]() |
Incertae sedis | Canada, Nova Scotia Morien Group |
Moscovian | ![]() | |
Gorgodon minutus | Olson, 1962 | ![]() |
Incertae sedis | USA, Texas San Angelo Formation |
Kungurian | ||
Ianthodon schultzei | Kissel & Reisz, 2004 | ![]() |
Eupelycosaurian Incertae sedis |
USA, Kansas Stanton Formation |
Kasimovian | ||
Milosaurus mccordi | Demar, 1970 | ![]() |
Incertae sedis | USA, Illinois Mottoon Formation |
Kasimovian | ||
Nitosaurus jacksonorum | Romer, 1937 | ![]() |
Incertae sedis | USA, New Mexico Abo/Cutler Formation |
Asselian | ||
Protoclepsydrops haplous | Carroll, 1964 | ![]() |
Possible synapsid | Canada, Nova Scotia Joggins Formation |
Moscovian |