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Thalattosauria
Taxonomy
Thalattosauria was named by Merriam (1905). It was considered monophyletic by Nicholls (1999).
It was reranked as the suborder Thalattosauria by Nopcsa (1923), Roxo (1937); it was synonymized subjectively with Thalattosauromorphi by Hay (1930); it was reranked as the unranked clade Thalattosauria by Cheng et al. (2007).
It was assigned to Diaptosauria by Merriam (1905); to Pelycosauria by Nopcsa (1923); to Rhynchocephalia by Roxo (1937); to Lepidosauria by Kuhn (1966); to Diapsida by Nicholls and Brinkman (1993); to Thalattosauriformes by Nicholls (1999); to Reptilia by Kuhn (1946), Sepkoski (2002); and to Diapsida by Carroll (1988), Cheng et al. (2007).
It was reranked as the suborder Thalattosauria by Nopcsa (1923), Roxo (1937); it was synonymized subjectively with Thalattosauromorphi by Hay (1930); it was reranked as the unranked clade Thalattosauria by Cheng et al. (2007).
It was assigned to Diaptosauria by Merriam (1905); to Pelycosauria by Nopcsa (1923); to Rhynchocephalia by Roxo (1937); to Lepidosauria by Kuhn (1966); to Diapsida by Nicholls and Brinkman (1993); to Thalattosauriformes by Nicholls (1999); to Reptilia by Kuhn (1946), Sepkoski (2002); and to Diapsida by Carroll (1988), Cheng et al. (2007).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1905 | Thalattosauria Merriam p. 5 |
| 1923 | Thalattosauria Nopcsa |
| 1937 | Thalattosauria Roxo p. 44 |
| 1946 | Thalattosauria Kuhn p. 60 |
| 1966 | Thalattosauria Kuhn p. 39 |
| 1988 | Thalattosauria Carroll |
| 1993 | Thalattosauria Nicholls and Brinkman p. 264 |
| 1999 | Thalattosauria Nicholls p. 26 |
| 2002 | Thalattosauria Sepkoski |
| 2007 | Thalattosauria Cheng et al. p. 247 |
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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.
Or. †Thalattosauria Merriam 1905
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Superfm. †Askeptosauroidea Wu et al. 2009
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Fm. †Askeptosauridae
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G. †Anshunsaurus Liu 1999
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†Anshunsaurus huangguoshuensis Liu 1999
†Anshunsaurus huangnihensis Cheng et al. 2007
†Anshunsaurus wushaensis Rieppel et al. 2006
Superfm. †Thalattosauroidea Nopcsa 1928
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G. †Agkistrognathus Nicholls and Brinkman 1993
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†Agkistrognathus campbelli Nicholls and Brinkman 1993
G. †Thalattosaurus Merriam 1904
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†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
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†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 synapomorphies—[1] supratemporal fenestra further reduced to a slit; [2 ] parietal flange absent; [ 3 ] supratemporal bone deep, extending anteriorly to meet frontal; [19] anterior tip of premaxilla recurved; [22] mandibular symphysis recurved; 1281 diastema between maxillary and premaxillary teeth. |
Measurements
No measurements are available
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| Source: o = order, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988, Bush and Bambach 2015 | |||||
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) | |
| Illyrian | Switzerland | Clarazia schinzi (174989) Hescheleria ruebeli (174992) | |
| Anisian - Ladinian | Switzerland | Askeptosaurus italicus (174993) | |
| Anisian - Ladinian | Canada (British Columbia) | Thalattosaurus sp. TMP 88.99.21, Paralonectes sp., Thalattosaurus borealis (152278) | |
| Illyrian - Fassanian | Switzerland | Askeptosaurus italicus (122057) | |
| Ladinian | China (Guizhou) | Xinpusaurus xingyiensis (213309) | |
| Longobardian | China (Guizhou) | Anshunsaurus wushaensis, Anshunsaurus huangnihensis (98907) Thalattosauria indet., Xinpusaurus xingyiensis (153372) Xinpusaurus sp. (196508) Xinpusaurus xingyiensis (196509 196510) | |
| Longobardian | Spain (Tarragona) | Thalattosauria indet. (109710) | |
| Longobardian | China (Yunnan) | Askeptosaurus sp. (196166) | |
| Carnian | USA (Oregon) | Thalattosauroidea Brisbois Member sp. (220464) | |
| Carnian | USA (California) | Nectosaurus halius (190855) Nectosaurus sp. (152274) Nectosaurus sp., Thalattosaurus sp. (152275) | |
| Carnian | China (Guizhou) | Anshunsaurus huangguoshuensis, Miodentosaurus brevis, Concavispina biseridens, Xinpusaurus suni, Xinpusaurus kohi (97906) | |
| 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) |