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Palaeosaniwa
Taxonomy
Palaeosaniwa was named by Gilmore (1928).
It was assigned to Saniwinae by Hay (1930) and McDowell and Bogert (1954); to Varanidae by Gilmore (1928), Estes (1964), Estes and Berberian (1970), Estes (1983), Carroll (1988), Bryant (1989), Clos (1995), Gao and Fox (1996) and Peng et al. (2001); to Platynota by Longrich et al. (2012); and to Monstersauria by Yi and Norell (2013) and Hamilton et al. (2023).
It was assigned to Saniwinae by Hay (1930) and McDowell and Bogert (1954); to Varanidae by Gilmore (1928), Estes (1964), Estes and Berberian (1970), Estes (1983), Carroll (1988), Bryant (1989), Clos (1995), Gao and Fox (1996) and Peng et al. (2001); to Platynota by Longrich et al. (2012); and to Monstersauria by Yi and Norell (2013) and Hamilton et al. (2023).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1928 | Palaeosaniwa Gilmore p. 83 |
| 1928 | Megasaurus Gilmore p. 157 |
| 1930 | Palaeosaniwa Hay p. 252 |
| 1930 | Megasaurus Hay p. 256 |
| 1954 | Palaeosaniwa McDowell and Bogert p. 132 |
| 1964 | Palaeosaniwa Estes p. 135 |
| 1970 | Palaeosaniwa Estes and Berberian p. 5 |
| 1983 | Palaeosaniwa Estes |
| 1988 | Palaeosaniwa Carroll |
| 1989 | Palaeosaniwa Bryant p. 48 |
| 1995 | Palaeosaniwa Clos p. 263 |
| 1996 | Palaeosaniwa Gao and Fox p. 89 |
| 2001 | Palaeosaniwa Peng et al. p. 31 |
| 2012 | Palaeosaniwa Longrich et al. |
| 2013 | Palaeosaniwa Yi and Norell |
| 2023 | Palaeosaniwa Hamilton et al. p. 5 |
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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.
G. †Palaeosaniwa Gilmore 1928
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†Palaeosaniwa canadensis Gilmore 1928
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Invalid names: Megasaurus robustus Gilmore 1928 [synonym]
Invalid names: Megasaurus Gilmore 1928 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Age range: base of the Late/Upper Campanian to the top of the Ti3 or 83.50000 to 56.80000 Ma
Collections (26 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | Canada (Alberta) | P. canadensis (45674 45822 45892 45893 45897 187421 232291) P. sp. (22699) | |
| Late/Upper Campanian | Mexico (Coahuila) | P. canadensis (154244) | |
| Late/Upper Campanian | Mexico (Baja California) | P. canadensis (197021) | |
| Middle Campanian | Canada (Alberta) | P. canadensis (45561 45565 45566 45820 118024) | |
| Middle Campanian - Late/Upper Campanian | Canada (Saskatchewan) | P. sp. (229975) | |
| Middle Campanian - Late/Upper Campanian | Canada (Alberta) | P. canadensis (45819 45821 45894 62722) | |
| Lancian | USA (North Dakota) | P. canadensis (137715) | |
| Lancian | USA (Wyoming) | Megasaurus robustus (14606) | |
| Lancian | USA (Montana) | P. canadensis (14568 179991) | |
| Late/Upper Maastrichtian | USA (South Dakota) | P. sp. (224484) | |
| Ti3 | Canada (Alberta) | P. sp. (14992) |