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Pankinosternoidea
Taxonomy
Pankinosternoidea was named by Joyce et al. (2004).
It was assigned to Chelydroidea by Joyce and Bourque (2016); and to Chelydroidea by Lyson et al. (2017).
It was assigned to Chelydroidea by Joyce and Bourque (2016); and to Chelydroidea by Lyson et al. (2017).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Pankinosternoidea Joyce et al. |
| 2016 | Pankinosternoidea Joyce and Bourque |
| 2017 | Pankinosternoidea Lyson et al. |
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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.
Unr. †Pankinosternoidea Joyce et al. 2004
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G. †Planetochelys Weems 1988
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†Planetochelys dithyros Hutchison 2013
†Planetochelys savoiei Weems 1988
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. R. Lyson et al. 2017 | a reduced cruciform plastron, true costiform processes (sensu Joyce, 2007) that cross peripheral I and terminate in peripheral II or III on the visceral shell surface, absence of extragulars, absence of pectorals, absence of a midline contact between the abdominals, and less than four inframarginals, |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum | |||||
| References: Uetz 2005, Carroll 1988, Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Late/Upper Campanian to the top of the Wasatchian or 83.60000 to 50.50000 Ma
Collections (37 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | USA (Utah) | Lutemys warreni (190747) | |
| Lancian | USA (Montana) | Emarginochelys cretacea (14616) Emarginochelys sp. (14568) Emarginochelys sp., Chelydridae indet. (14512) | |
| Lancian | USA (Wyoming) | Emarginochelys sp. (14519) | |
| Lancian | USA (North Dakota) | Emarginochelys cretacea (137715) | |
| Late/Upper Maastrichtian | USA (Montana) | Emarginachelys cretacea (131973) | |
| Late/Upper Maastrichtian | USA (South Dakota) | Tullochelys sp. (224484) | |
| Late/Upper Maastrichtian | USA (North Dakota) | Emarginochelys cretacea (137718) | |
| Puercan | USA (Montana) | Tullochelys montana (168332 168333 168335 168338 168339) | |
| Late/Upper Paleocene | USA (Virginia) | Planetochelys savoiei (84048) | |
| Wasatchian | USA (New Mexico) | Planetochelys dithyros (176878 176909) | |
| Wasatchian | USA (Wyoming) | Planetochelys dithyros (15529 15532 15538 15553 168286 168296 168304 168310 168312 168318 168319 168320 168321 168328 168330 168331) Planetochelys sp. (59898 59899 59900 118482) |