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Synapsida (synapsid)

Synonymy list
YearName and author
1902Protherosauria Osborn
1903Synapsida Osborn p. 276
1904Synapsida Osborn p. 99
1937Synapsida Roxo p. 43
1947Synapsida Olson pp. 44, 45
1953Synapsida Olson and Beerbower p. 399
1954Synapsida Haughton and Brink p. 5
1962Synapsida Olson p. 95
1965Synapsida Lewis and Vaughn pp. C12, C26
1966Synapsida Olson p. 301
1972Synapsida Waldman and Savage
1973Synapsida Daly p. 587
1974Synapsida Olson p. 28
1977Synapsida Currie p. 929
1981Synapsida Langston, Jr. and Reisz p. 74
1985Synapsida Benton p. 153
1988Synapsida Carroll
1988Synapsida Gauthier et al. p. 139 fig. 4.4
1989Synapsida Gauthier et al. p. 340
1995Synapsida Laurin and Reisz p. 179 fig. 2
1997Synapsida McKenna and Bell
2003Synapsida Meyer and Zardoya

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phylumChordataHaeckel 1847
subclassDipnotetrapodomorpha(Nelson 2006)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

No diagnoses are available
No measurements are available
Composition: phosphaticsubp
Maximum body mass: 1374.7 kgs
Minimum body mass: 3 gs
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: s = species, c = class, subp = subphylum, uc = unranked clade
References: Kiessling 2004, Johnson and Madden 1997, Vizcaíno et al. 2010, Hu et al. 2005, Carroll 1988, Hendy et al. 2009, Uhen and Gingerich 1995, Hopson 1973, Madden 1997

Age range

Maximum range based only on fossils: base of the Westphalian A to the top of the Holocene or 318.10000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 314.6 Ma

Collections (20797 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Westphalian A318.1 - 314.6Canada (Nova Scotia) Protoclepsydrops haplous (28069)
Westphalian C - Westphalian D314.6 - 306.95Canada (Nova Scotia) Clepsydrops sp., Archaeothyris florensis, Echinerpeton intermedium (80111)
Westphalian D311.45 - 306.95USA (Ohio) Archaeothyris sp., Pelycosauria indet. (85292)
Westphalian D311.45 - 306.95Czech Republic (Pilsen) Archaeothyris sp. (84835)
Stephanian306.95 - 298.9France (Bourgogne) Stereorhachis dominans (80716)
Missourian305.9 - 303.4USA (Colorado) Ianthasaurus sp. (180938)
Missourian305.9 - 303.4USA (Illinois) Clepsydrops sp., Archaeobelus vellicatus, Clepsydrops collettii, Clepsydrops vinslovii, Clepsydrops pedunculatus, Captorhinus illinoisensis (80714)
Missourian305.9 - 303.4USA (Kansas) Haptodus garnettensis, Ianthasaurus hardestii, Edaphosaurus ecordi, Xyrospondylus ecordi, Ianthodon schultzei, Kenomagnathus scotti, Tenuacaptor reiszi (80784)
Missourian305.9 - 303.4USA (Pennsylvania) Edaphosaurus raymondi (80775 180937)
Missourian - Virgilian305.9 - 298.9USA (Pennsylvania) Clepsydrops magnus (173987)
Stephanian B304.8 - 303.4Czech Republic Macromerion schwarzenbergii, Macromerion schwartzenbergii, Naosaurus mirabilis (154179)
Gzhelian303.7 - 298.9Germany (Rhineland-Palatinate) Cryptovenator hirschbergeri (109702)
Gzhelian - Asselian303.7 - 295.5Germany (Thuringia) Haptodus sp. (180761)
Gzhelian - Sakmarian303.7 - 290.1USA (New Mexico) Ophiacodon sp., Sphenacodon sp. (180989)
Gzhelian - Sakmarian303.7 - 290.1Italy (Sassari) Cotylorhynchus sp. (180994)
Virgilian303.4 - 298.9USA (New Mexico) Aerosaurus greenlorum, Elcabrosaurus baldwini, Dimetrodon navajovicus, Aerosaurus greenleeorum, Ruthiromia elcobriensis, Baldwinonus trux, Ophiacodon navajovicus, Edaphosaurus novomexicanus, Sphenacodon ferox, Nitosaurus jacksonorum (34761)
Virgilian303.4 - 298.9USA (Kansas) Archaeovenator hamiltonensis, Eocasea martini (68427)
Virgilian303.4 - 298.9USA (Oklahoma) Sphenacodontia indet., Ophiacodon mirus (13947)
Virgilian303.4 - 298.9USA (West Virginia) Edaphosaurus colohistion (13049 177058)
Virgilian - Stephanian303.4 - 298.9USA (Illinois) Milosaurus mccordi (81114)