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User:Paleocemoski/List of synapsids

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This list of synapsids is a listing of all species that have ever been included in the class Synapsida, excluding class Mammalia.

  • Valid species
  • Junior synonym
  • Vague status
  • Rejected as valid taxon

Number of species

[edit]
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

[edit]
Species Authority Synonyms Status Notes Location Age Images
Alierasaurus ronchii Romano and Nicosia, 2014 Italy, Sardinia
Cala del Vino Formation
Kungurian or Roadian
Angelosaurus dolani Olson & Beerbower, 1953 USA, Texas
San Angelo Formation
Kungurian
Angelosaurus greeni Olson, 1962 USA, Texas
Flowerpot Formation
Kungurian
Angelosaurus romeri Olson & Barghusen 1962 USA, Oklahoma
Chickasha Formation
Roadian
Casea broilii Williston, 1910 USA, Texas
Arroyo Formation
Kungurian
Casea halselli Olson, 1954 USA, Texas
Choza Formation
Kungurian
Casea nicholsi Olson, 1954 USA, Texas
Vale Formation
Kungurian
Casea rutena Sigogneau-Russel & Russell, 1974 Synonym of Euromycter rutenus France, Aveyron
Colline du Cayla
Sakmarian
Caseoides sanangelensis Olson and Beerbower 1953 USA, Texas
San Angelo Formation
Kungurian
Caseopsis agilis Olson, 1962 USA, Texas
San Angelo Formation
Kungurian
Cotylorhynchus bransoni Olson & Barghusen, 1962 USA, Oklahoma
Flowerpot Formation
Kungurian
Cotylorhynchus hancocki Olson & Beerbower, 1953 USA, Texas
San Angelo Formation
Kungurian
Cotylorhynchus romeri Stovall, 1937a USA, Oklahoma
Hennessey Formation
Kungurian
Ennatosaurus tecton Efremov, 1956 Russia, Arkhangelsk
Wordian
Eocasea martini Reisz & Fröbisch, 2014 USA, Kansas
Hamilton Quarry
Gzhelian
Euromycter rutenus Sigogneau-Russell & Russell, 1974 Casea rutena France, Aveyron
Colline du Cayla
Sakmarian
Knoxosaurus niteckii Olson, 1962 USA, Texas
San Angelo Formation
Kungurian
Oromycter dolesorum Reisz, 2005 USA, Oklahoma
Garber Formation
Kungurian
Phreatophasma aenigmaticum Efremov, 1954 Russia, Bashkortostan
Roadian
Ruthenosaurus russellorum Reisz, 2011 France, Aveyron
Colline du Cayla
Sakmarian
Trichasaurus texenensis Williston, 1913 Trispondylus texenensis USA, Texas
Arroyo Formation
Kungurian

Edaphosauridae

[edit]
Species Authority Synonyms Status Notes Location Age Images
Brachycnemius dolischomerus Williston, 1911 Synonym of Edaphosaurus pogonias USA, Texas
Arroyo Formation
Kungurian
Edaphosaurus boanerges Romer & Price, 1940 USA, Texas
Archer City Formation
Nocona Formation
Artinskian
Edaphosaurus claviger Cope, 1886 Synonym of Edaphosaurus pogonias USA, Texas
Arroyo Formation
Kungurian
Edaphosaurus colohistion Berman, 1979 USA, West Virginia
Pittsburgh Formation
Gzhelian
Edaphosaurus credneri Romer & Price, 1940 Synonym of Ianthasaurus credneri Germany, Sachsen State
Niederhäslich Formation
Sakmarian
Edaphosaurus cruciger Romer & Price, 1940 Dimetrodon cruciger
Edaphosaurus microdus
Naosaurus cruciger
Naosaurus microdus
USA, Texas
Belle Plains Formation
Lueders Formation
USA, Oklahoma
Garber Formation
Kungurian
Edaphosaurus ecordi Peabody, 1957 Synonym of Xyrospondylus ecordi USA, Kansas
Stanton Formation
Kasimovian
Edaphosaurus microdus Cope, 1884 Synonym of Edaphosaurus cruciger USA, Texas Kungurian
Edaphosaurus mirabilis Romer & Price, 1940 Synonym of Ianthasaurus mirabilis Czech Republic, Kuonova Gzhelian
Edaphosaurus novomexicanus Williston and Case, 1913 USA ,New Mexico
Abo/Cutler Formation
Gzhelian to Asselian
Edaphosaurus pogonias Cope, 1882 Brachycnemius dolischomerus
Edaphosaurus claviger
Naosaurus claviger
Naosaurus pogonias
USA, Texas
Arroyo Formation
Kungurian
Edaphosaurus raymondi Romer & Price, 1940 Ianthasaurus raymondi
Naosaurus raymondi
USA, Pennsylvania
Round Knob Formation
Kasimovian or Gzhelian
Glaucosaurus megalops Williston, 1915 USA, Texas
Waggoner Ranch Formation
Kungurian
Ianthasaurus credneri Romer & Price, 1940 Edaphosaurus credneri
Naosaurus credneri
Germany, Sachsen State
Niederhäslich Formation
Sakmarian
Ianthasaurus hardestii Reisz & Berman, 1986 USA, Kansas
Stanton Formation
Kasimovian
Ianthasaurus mirabilis Romer & Price, 1940 Edaphosaurus mirabilis
Naosaurus mirabilis
Czech Republic, Kuonova Gzhelian
Ianthasaurus raymondi Case, 1908 Synonym of Edaphosaurus raymondi USA, Pennsylvania
Round Knob Formation
Kasimovian or Gzhelian
Lupeosaurus gigas Romer, 1936 Synonym of Lupeosaurus kayi USA, Texas
Moran Formation
Artinskian
Lupeosaurus kayi Romer, 1937 Dimetrodon gigas
Luperosaurus gigas
USA, Texas
Moran Formation
Artinskian
Naosaurus claviger Cope, 1886 Synonym of Edaphosaurus pogonias USA, Texas
Arroyo Formation
Kungurian
Naosaurus credneri Jaekel, 1910 Synonym of Ianthasaurus credneri Germany, Sachsen State
Niederhäslich Formation
Sakmarian
Naosaurus cruciger Cope, 1880 Synonym of Edaphosaurus cruciger USA, Texas Kungurian
Naosaurus microdus Cope, 1881 Synonym of Edaphosaurus cruciger USA, Texas Kungurian
Naosaurus mirabilis Fritsch, 1895 Synonym of Ianthasaurus mirabilis Czech Republic, Kuonova Gzhelian
Naosaurus pogonias Cope, 1882 Synonym of Edaphosaurus pogonias USA, Texas
Arroyo Formation
Kungurian
Naosaurus raymondi Case, 1908 Synonym of Edaphosaurus raymondi USA, Pennsylvania
Round Knob Formation
Kasimovian or Gzhelian
Xyrospondylus ecordi Reisz, Heaton & Pynn, 1982 Edaphosaurus ecordi USA, Kansas
Stanton Formation
Kasimovian

Eothyrididae

[edit]
  • 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

[edit]
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

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Sphenacodontidae

[edit]
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

[edit]

Other sphenacodontians

[edit]
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

[edit]

Mycterosaurinae

[edit]
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

[edit]
  • 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

[edit]
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

[edit]
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