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Stagonosuchus
Taxonomy
Stagonosuchus was named by Huene (1938). Its type is Stagonosuchus nyassicus. It was considered monophyletic by Lautenschlager and Desojo (2011).
It was assigned to Prestosuchidae by Charig (1967); to Rauisuchidae by Kuhn (1966), Carroll (1988) and Long and Murry (1995); and to Rauisuchia by Lautenschlager and Desojo (2011).
It was assigned to Prestosuchidae by Charig (1967); to Rauisuchidae by Kuhn (1966), Carroll (1988) and Long and Murry (1995); and to Rauisuchia by Lautenschlager and Desojo (2011).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1938 | Stagonosuchus Huene p. 265 |
| 1966 | Stagonosuchus Kuhn p. 74 |
| 1967 | Stagonosuchus Charig p. 709 |
| 1988 | Stagonosuchus Carroll |
| 1995 | Stagonosuchus Long and Murry p. 119 |
| 2011 | Stagonosuchus Lautenschlager and Desojo |
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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. †Stagonosuchus Huene 1938
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†Stagonosuchus major Haughton 1932
†Stagonosuchus nyassicus Huene 1938
†Stagonosuchus tanganyikaensis Boonstra 1953
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Lautenschlager and J. B. Desojo 2011 | Stagonosuchus nyassicus can be distinguished from all other rauisuchian archosaurs by the combination of the following characters (* indicates autapomorphies): centra of presacral vertebrae higher than long (length:height = 0.75–1:1); additional infraprezygapophyseal and infrapostzygapophyseal laminae in the eighth cervical vertebra*; last cervical and dorsal vertebrae with
hyposphene-hypantrum articulations; neural spines of sacral vertebrae unfused, but interlocking and inclined in posterior direction; distal expansion of humerus approximately 65% of proximal expansion; ilium without a well-defined vertical ridge or swelling above the supracetabular rim; a boss-like protuberance on the postacetabular process of the iliac blade*; a marked short dorsolateral crest on the proximal ischium*; rounded protuberances at the midline of the ventral ischia contact*, ischium with posteriorly expanded distal end; elongate (lunate) depression on the posteromedial surface of the distal part of the fibula. |
Measurements
No measurements are available
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| Source: subo = suborder, subc = subclass, c = class, subp = subphylum | |||||
| References: Benton 1983, Carroll 1988, Hendy et al. 2009 | |||||
Age range: Anisian or 247.20000 to 242.00000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Anisian | Tanzania (Iringa) | S. tanganyikaensis (55756) | |
| Anisian | Tanzania (Ruvuma) | S. nyassicus (105767) Stenaulorhynchus major (105297 136941) |