List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia
- Temnospondyli
- Trematosauridae
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Aphaneramma sp.
Woodward 1904
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1 specimen | |||||||||
MNHN specimen, skull fragment | ||||||||||
= Wantzosaurus elongatus
Lehman 1961
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Schoch and Milner 2000 | |||||||||
see common names |
Geography
Country: | Madagascar | State/province: | Diana | County: | Ambilobe |
Coordinates: | 13.7° South, 48.7° East (view map) | ||||
Paleocoordinates: | 44.6° South, 41.1° East | ||||
Basis of coordinate: | based on nearby landmark | ||||
Geographic resolution: | small collection |
Stratigraphy
Geological group: | Sakamena | Formation: | Middle Sakamena | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: "All previously described tetrapod specimens from the Diego Basin have been collected from the 'Couches à Poissons et Ammonites' (Besairie 1971) suggesting that the material described herein also pertains to this horizon, though this cannot be stated with absolute certainty." The "Couches à Poissons et Ammonites" are equivalent to the Middle Sakamena Formation of the Morondava Basin. "Biostratigraphical correlations based on ammonite faunas indicate referral of the 'Couches à Poissons et Ammonites' to the local Gyronitien Stage (Besairie 1971), which is equivalent to the Induan Stage of the Lower Triassic. This conclusion is supported by comparisons between the vertebrate faunas of Madagascar and the African mainland, which suggest that the Middle Sakamena Formation is intermediate in age between the Lystrosaurus and Cynognathus Assemblage Zones (Battail et al. 1987). Palynological data is also consistent with these interpretations (Wescott and Diggens 1998)." (Ketchum & Barrett, 2004. Canadian Journal of Earth Sciences 41:1-8).
"The presence of Magniestheria truempyi in the same formation (Shen et al., 2002) indicates an Early Smithian (Olenekian, Early Triassic) age by correlation with the well-constrained Triassic strata of the Germanic Basin (Kozur and Weems, 2010)." (Falconnet et al. 2010. Comptes Rendus Palevol 11:357-369) Given the conflicting suggestions of an Induan or early Olenekian age, an Induan–Smithian range is given here. |
Lithology and environment
Primary lithology: | nodular "siliciclastic" |
Includes fossils? | Y |
Lithology description: Fossils preserved in ironstone nodules | |
Environment: | deltaic indet. |
Taphonomy
Modes of preservation: | mold/impression |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | MNHN |
Metadata
Database number: | 144089 | ||
Authorizer: | R. Butler | Enterer: | R. Butler |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2013-04-30 18:26:44 | Last modified: | 2018-02-01 13:03:12 |
Access level: | the public | Released: | 2013-04-30 18:26:44 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
46587. | J.-P. Lehman. 1966. Nouveaux Stégocéphales de Madagascar. Annales de Paléontologie (Vertébrés) 52:117-139 [R. Butler/R. Butler] |
Secondary references:
28828 | R. Schoch and A. R. Milner. 2000. Stereospondyli. Handbuch der Paläoherpetologie - Encyclopedia of Paleoherpetology 3B:1-203 [J. Mueller/T. Liebrecht] |