| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Symmetrodonta (symmetrodont)
Taxonomy
Symmetrodonta was named by Simpson (1925).
It was reranked as the unranked clade Symmetrodonta by McKenna (1975) and Averianov (2002); it was reranked as the infraclass Symmetrodonta by Averianov and Lopatin (2011).
It was assigned to Allotheria by Hay (1930); to Mammalia by Simpson (1928) and Olson (1966); to Trechnotheria by McKenna (1975) and Prothero (1981); to Yangotheria by Chow and Rich (1982); to Trituberculata by Carroll (1988); to Pantotheria by Cassiliano and Clemens (1979) and Bonaparte (1990); to Theria by Simpson (1929) and Hu et al. (1997); to Holotheria by Averianov (2002); and to Acrotheria by Averianov and Lopatin (2011).
It was reranked as the unranked clade Symmetrodonta by McKenna (1975) and Averianov (2002); it was reranked as the infraclass Symmetrodonta by Averianov and Lopatin (2011).
It was assigned to Allotheria by Hay (1930); to Mammalia by Simpson (1928) and Olson (1966); to Trechnotheria by McKenna (1975) and Prothero (1981); to Yangotheria by Chow and Rich (1982); to Trituberculata by Carroll (1988); to Pantotheria by Cassiliano and Clemens (1979) and Bonaparte (1990); to Theria by Simpson (1929) and Hu et al. (1997); to Holotheria by Averianov (2002); and to Acrotheria by Averianov and Lopatin (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Symmetrodonta Simpson |
| 1928 | Symmetrodonta Simpson p. 97 |
| 1929 | Symmetrodonta Simpson p. 38 |
| 1930 | Symmetrodonta Hay p. 370 |
| 1966 | Symmetrodonta Olson p. 302 |
| 1975 | Symmetrodonta McKenna p. 40 |
| 1979 | Symmetrodonta Cassiliano and Clemens p. 151 |
| 1981 | Symmetrodonta Prothero p. 321 |
| 1982 | Symmetrodonta Chow and Rich p. 129 |
| 1988 | Symmetrodonta Carroll |
| 1990 | Symmetrodonta Bonaparte p. 66 |
| 1997 | Symmetrodonta Hu et al. p. 137 |
| 2002 | Symmetrodonta Averianov p. 714 |
| 2011 | Symmetrodonta Averianov and Lopatin p. 34 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
Or. †Symmetrodonta Simpson 1925 [symmetrodont]
show all | hide all
Fm. †Amphidontidae Simpson 1925
hide
Fm. †Woutersiidae Sigogneau-Russell and Hahn 1995
hide
G. †Woutersia Sigogneau-Russell 1983
+
†Woutersia butleri Sigogneau-Russell and Hahn 1995
†Woutersia mirabilis Sigogneau-Russell 1983
Invalid names: Barbereniidae Bonaparte 1990 [empty], Spalacotheriida Prothero 1981 [empty], Tinodontida Prothero 1981 [empty]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|||||
|
|
||||
| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hopson 1973, Luo et al. 2003, Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Rhaetian to the top of the Late/Upper Maastrichtian or 208.50000 to 66.00000 Ma
Collections (25 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhaetian | France (Lorraine) | Woutersia mirabilis (92109) Woutersia mirabilis, Woutersia butleri (36106) | |
| Hettangian - Sinemurian | United Kingdom (Wales) | Symmetrodonta indet. (45919) | |
| Toarcian - Aalenian | India (Andhra Pradesh) | Trishulotherium kotaensis, Nakunodon paikasiensis (39673) | |
| Kimmeridgian - Tithonian | USA (Wyoming) | Amphidon superstes, Amphidon aequicrurius (12816) Symmetrodonta indet. (55333) | |
| Late/Upper Kimmeridgian | Portugal (Centro) | Symmetrodonta indet. (49304 69708) | |
| Tithonian | USA (Colorado) | Symmetrodonta indet. (53040) | |
| Tithonian | USA (Utah) | Symmetrodonta indet. (57913) | |
| Early/Lower Tithonian | USA (Colorado) | Symmetrodonta indet. (71476) | |
| Late/Upper Tithonian - Early/Lower Berriasian | Morocco (Figuig) | Symmetrodonta indet. (204918 204936 204990) | |
| Early/Lower Barremian | Spain (Aragón) | Symmetrodonta indet. (28196) | |
| Late/Upper Barremian - Early/Lower Aptian | Germany (North Rhine-Westphalia) | Symmetrodonta indet. (152548) | |
| Barremian - Aptian | Russian Federation (Kemerovo) | Amphidontidae indet. (52808) | |
| Barremian - Aptian | Russian Federation (Krasnoyarsk) | Amphidontidae indet. (206601 206602) | |
| Aptian | Russian Federation (Kemerovo) | Acinacodus tagaricus (39680) | |
| Middle Turonian | USA (Utah) | Symmetrodonta indet. (14416) | |
| Middle Turonian - Late/Upper Turonian | USA (Utah) | Symmetrodonta indet. (14414) | |
| Early/Lower Campanian | USA (Utah) | Symmetrodonta indet. (75839) | |
| Maastrichtian | Portugal (Coimbra) | Symmetrodonta indet. (49276) | |
| Late/Upper Maastrichtian | India (Maharashtra) | Symmetrodonta indet. (58102) |