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Younginiformes
Taxonomy
Younginiformes was named by Romer (1933). It was considered monophyletic by Laurin (1991) and paraphyletic by Bickelmann et al. (2009).
It was reranked as the suborder Younginiformes by Haughton and Brink (1954) and Currie (1982); it was reranked as the unranked clade Younginiformes by Laurin (1991), Laurin and Reisz (1995) and Bickelmann et al. (2009).
It was assigned to Eosuchia by Haughton and Brink (1954); to Eosuchia by Currie (1982); to Lepidosauromorpha by Benton (1985); to Lepidosauromorpha by Gauthier et al. (1989); to Diapsida by Laurin and Reisz (1995); and to Neodiapsida by Laurin (1991) and Bickelmann et al. (2009).
It was reranked as the suborder Younginiformes by Haughton and Brink (1954) and Currie (1982); it was reranked as the unranked clade Younginiformes by Laurin (1991), Laurin and Reisz (1995) and Bickelmann et al. (2009).
It was assigned to Eosuchia by Haughton and Brink (1954); to Eosuchia by Currie (1982); to Lepidosauromorpha by Benton (1985); to Lepidosauromorpha by Gauthier et al. (1989); to Diapsida by Laurin and Reisz (1995); and to Neodiapsida by Laurin (1991) and Bickelmann et al. (2009).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1933 | Younginiformes Romer |
| 1954 | Younginiformes Haughton and Brink p. 3 |
| 1982 | Younginiformes Currie |
| 1985 | Younginiformes Benton p. 154 |
| 1989 | Younginiformes Gauthier et al. p. 344 |
| 1991 | Younginiformes Laurin pp. 83, 87 fig. 11 |
| 1995 | Younginiformes Laurin and Reisz pp. 171, 172 |
| 2009 | Younginiformes Bickelmann et al. p. 652 |
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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. †Younginiformes Romer 1933
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Superfm. †Younginoidea Currie 1982
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Fm. †Tangasauridae Haughton 1924
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Subfm. †Kenyasaurinae Currie 1982
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Subfm. †Tangasaurinae Piveteau 1926
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Fm. †Younginidae Broom 1914
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G. †Thadeosaurus Carroll 1981
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†Thadeosaurus colcanapi Carroll 1981
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Invalid names: Broomia madagascariensis Piveteau 1926 [synonym]
G. †Youngina Broom 1914
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†Youngina capensis Broom 1914
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Invalid names: Acanthotoposaurus bremneri Evans and van den Heever 1987 [synonym], Youngoides minor Broom and Robinson 1948 [synonym], Youngoides romeri Olson and Broom 1937 [synonym], Youngopsis kitchingi Broom 1937 [synonym], Youngopsis rubidgei Broom and Robinson 1948 [synonym]
Invalid names: Acanthotoposaurus Evans and van den Heever 1987 [synonym], Youngoides Olson and Broom 1937 [synonym], Youngopsis Broom 1937 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Wuchiapingian to the top of the Olenekian or 259.90000 to 247.20000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wuchiapingian | South Africa (Western Cape) | Youngina capensis (84714) | |
| Lopingian | Madagascar (Tulear) | Thadeosaurus colcanapi, Acerosodontosaurus piveteaui, Hovasaurus boulei (85494) | |
| Wuchiapingian - Changhsingian | South Africa (Eastern Cape) | Youngina capensis (80225 80226 171147) Youngina capensis, Acanthotoposaurus bremneri (80216) Youngina capensis, Youngopsis kitchingi, Youngoides minor (80219) Youngopsis rubidgei (171146) | |
| Wuchiapingian - Changhsingian | South Africa (Western Cape) | Youngina capensis (88342 89859) | |
| Changhsingian | Tanzania | Tangasaurus mennelli (171354) | |
| Induan - Olenekian | Kenya (Coast) | Kenyasaurus mariakaniensis (87220) | |
| Induan - Smithian | Madagascar (Diana) | Tangasauridae indet., Tangasaurinae indet., Hovasaurus boulei (92493) |