| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Thalattosauriformes
Taxonomy
Thalattosauriformes was named by Nicholls (1999). It was considered monophyletic by Nicholls (1999).
It was assigned to Diapsida by Nicholls (1999); and to Diapsida by Müller (2005), Müller (2007).
It was assigned to Diapsida by Nicholls (1999); and to Diapsida by Müller (2005), Müller (2007).
Subtaxa
Synonymy list
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.
Unr. †Thalattosauriformes Nicholls 1999
show all | hide all
Or. †Thalattosauria Merriam 1905
hide
Superfm. †Askeptosauroidea Wu et al. 2009
hide
Fm. †Askeptosauridae
+
G. †Anshunsaurus Liu 1999
+
†Anshunsaurus huangguoshuensis Liu 1999
†Anshunsaurus huangnihensis Cheng et al. 2007
†Anshunsaurus wushaensis Rieppel et al. 2006
Superfm. †Thalattosauroidea Nopcsa 1928
hide
G. †Agkistrognathus Nicholls and Brinkman 1993
+
†Agkistrognathus campbelli Nicholls and Brinkman 1993
G. †Thalattosaurus Merriam 1904
+
†Thalattosaurus alexandrae Merriam 1904
†Thalattosaurus borealis Nicholls and Brinkman 1993
Invalid names: Thalattosaurus perrini Merriam 1905 [nomen dubium], Thalattosaurus shastensis Merriam 1905 [nomen dubium]
G. †Xinpusaurus Yin 2000
+
†Xinpusaurus bamaolinensis Cheng 2003
†Xinpusaurus kohi Jiang et al. 2004
†Xinpusaurus suni Yin 2000
†Xinpusaurus xingyiensis Li et al. 2016
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. L. Nicholls 1999 | It is diagnosed by the following four unequivocal synapomorphies —[17] premaxilla elongated into rostrum; [24] elongate retroarticular process; [36] caudal vertebrae distinctive, with high, posteriorly inclined neural spines; [39] ilium with narrow, posteriorly angled iliac blade. Other characters, which probably diagnose this clade cannot be considered equivocal due to incomplete preser- vation of Endennosaurus. These include [ 1 ] supratcmporal fenestra small and narrow; [3] supratemporal bone lies deep, along lateral surface of parietal; [4] skull emarginated posteriorly, with occiput anterior to mandibular articulation. |
Measurements
No measurements are available
|
|
||||
|
|||||
|
|
||||
| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Collections (28 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Smithian | Canada (British Columbia) | Paralonectes merriami (152277) Paralonectes merriami, Agkistrognathus campbelli (105083) | |
| Anisian - Ladinian | Canada (British Columbia) | Thalattosaurus sp. TMP 88.99.21, Paralonectes sp., Thalattosaurus borealis (152278) | |
| Anisian - Ladinian | Switzerland | Askeptosaurus italicus (174993) | |
| Illyrian | Switzerland | Clarazia schinzi (174989) Hescheleria ruebeli (174992) | |
| Illyrian - Fassanian | Switzerland | Askeptosaurus italicus (122057) | |
| Ladinian | China (Guizhou) | Xinpusaurus xingyiensis (213309) | |
| Longobardian | Spain (Tarragona) | Thalattosauria indet. (109710) | |
| Longobardian | China (Guizhou) | Anshunsaurus wushaensis, Anshunsaurus huangnihensis (98907) Thalattosauria indet., Xinpusaurus xingyiensis (153372) Xinpusaurus sp. (196508) Xinpusaurus xingyiensis (196509 196510) | |
| Longobardian | China (Yunnan) | Askeptosaurus sp. (196166) | |
| Carnian | China (Guizhou) | Anshunsaurus huangguoshuensis, Miodentosaurus brevis, Concavispina biseridens, Xinpusaurus suni, Xinpusaurus kohi (97906) | |
| Carnian | USA (Oregon) | Thalattosauroidea Brisbois Member sp. (220464) | |
| Carnian | USA (California) | Nectosaurus halius (190855) Nectosaurus sp. (152274) Nectosaurus sp., Thalattosaurus sp. (152275) | |
| Tuvalian | USA (California) | Nectosaurus sp. (188587) Nectosaurus sp., Nectosaurus halius (136683) Thalattosaurus alexandrae, Nectosaurus halius (136682) | |
| Tuvalian | China (Guizhou) | Anshunsaurus huangguoshuensis, Xinpusaurus suni, Xinpusaurus bamaolinensis (85166) | |
| Norian | USA (Alaska) | Gunakadeit joseeae (207961) | |
| Norian | Canada (British Columbia) | Thalattosauria indet. (192386) | |
| Norian - Rhaetian | Austria | Thalattosauriformes indet. (152276) | |
| Alaunian | Italy (Lombardia) | Endennasaurus acutirostris (36377) |