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Arenaerpeton
Taxonomy
Arenaerpeton was named by Hart et al. (2023). Its type is Arenaerpeton supinatus.
It was assigned to Chigutisauridae by Hart et al. (2023).
It was assigned to Chigutisauridae by Hart et al. (2023).
Species
A. supinatus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Arenaerpeton Hart et al. p. 2 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. J. Hart et al. 2023 | Arenaerpeton supinatus possesses a brachycepha- lic skull, as seen in all other brachyopoids and some dvinosaurs but can be excluded from Dvinosauria due to the presence of a flat cultriform process of the parasphenoid which does not expand anteriorly (Warren & Marsicano, 2000). Arenaerpeton supinatus is included within Chigutisauridae as it exhibits a large number of small marginal teeth on the premaxilla and maxilla (as opposed to the large and sparse teeth seen in Brachyopidae); and a postquadratojugal projection (Warren & Marsicano, 1998). Arenaerpeton supinatus is identified as a new chigutisaurid due to the following unique combination of characters: (1) pterygoid and exoccipital suture (shared with Compsocerops—may also be present in other chigutisaurids); (2) corpus of pterygoid and parasphenoid unornamented (shared with all chigutisaurids except Keratobrachyops); (3) parasphenoid cultriform process narrow and flat (shared with Pelorocephalus and Compsocerops); (4) vomerine depression anterior to the cultriform process (shared with Keratobrachyops and Siderops); (5) parasphenoid corpus almost as wide as long (shared with all chigutisaurids except Compsocerops); (6) ventral surface of the cultriform process of the parasphenoid lacking a keel (shared with Siderops, Compsocerops, and Kuttycephalus); (7) mandible post-glenoid area slender and elongate (shared with Keratobrachyops and Pelorocephalus); (8) adjacent intercentra contact (shared with Siderops and Pelorocephalus); (9) ossified ceratobranchials absent in adult (shared with Kuttyce- phalus and Compsocerops). |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Uhen 2004, Carroll 1988, Hendy et al. 2009 | |||||
Age range: Early/Lower Triassic or 251.90200 to 246.70000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Triassic | Australia (New South Wales) | A. supinatus (232467) |