Irati Formation, SP: Artinskian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mesosauridae
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| Rossmann 2000 | 10 individuals | |||||||||
| "Mesosaurus oder Stereosternum": SMF-R-4472, 4475, 4479a+b, 4481, 4483, 4488, 4496, 4934; "Stereosternum oder Brazilosaurus": SMF-R-4476, 4494 | ||||||||||
| 3 individuals | ||||||||||
| BSP 1964 I 268, 1967 I 11; SMF-R-499; information on SMF specimen is from Rossmann (2000) | ||||||||||
| 13 individuals | ||||||||||
| BSP 1982 I 27, 1997 I 68; SMF-R-4473, 4477, 4478, 4480a+b, 4482, 4487, 4489, 4490, 4493, 4495, 4497; data on SMF specimens are from Rossmann (2000) | ||||||||||
| Karl et al. 2007 | 1 fragment | |||||||||
| IGP Vb 132 ("fragmentary mandible") | ||||||||||
| Rossmann 2002 | 1 individual | |||||||||
| PIMUZ A/III 0591 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | São Paulo |
| Coordinates: | 23.0° South, 47.9° West (view map) | ||
| Paleocoordinates: | 45.8° South, 26.7° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | local area |
Time
| Period: | Permian | Epoch: | Cisuralian |
| Stage: | Artinskian | 10 m.y. bin: | Permian 2 |
| Key time interval: | Artinskian | ||
| Age range of interval: | 290.1 - 283.3 m.y. ago |
Stratigraphy
| Geological group: | Passa Dois | Formation: | Irati | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Rossmann & Maisch (1999) state that the fossils come from the Irati Formation but only give "Lower Permian" as the most precise age specification. However, in a quite recent publication it is stated that the Irati Formation is Artinskian in age, based on absolute ages obtained from zircons from a bentonite layer (Santos et al., 2006, Gondwana Res. 9). | |||||
Lithology and environment
| Primary lithology: | white,yellow "limestone" | ||
| Secondary lithology: | black "shale" | ||
| Includes fossils? | Y | ||
| Includes fossils? | Y | ||
| Lithology description: BSP 1982 I 27 is the only specimen preserved in black shale. | |||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Articulated whole bodies: | some |
| Associated major elements: | many |
| Disassociated major elements: | many |
| Temporal resolution: | time-averaged |
Collection methods and comments
| Collection methods: | survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | BSP,SMF |
| Collection method comments: BSP = Bayerische Staatssammlung für Paläontologie und Historische Geologie, München [Bavarian State Collection of Palaeontology and Historical Geology, Munich]
IGP = Institut für Geologie und Paläontologie der Technischen Universität Clausthal [Department of Geology and Palaeontology of the Clausthal University of Technology] PIMUZ = Paläontologisches Institut und Museum der Universität Zürich [Department and Museum of Palaeontology of Zurich University] SMF = Senckenberg Museum, Frankfurt/Main | |
| Taxonomic list comments:Specimens listed by Rossmann & Maisch (1999) are taxonomically revised and may originally have been referred to different taxa (in most cases this may have been the junior synonyms of the taxa currently considered valid). | |
Metadata
| Also known as: | Paraná Basin of eastern State of São Paulo | ||
| Database number: | 90193 | ||
| Authorizer: | J. Mueller | Enterer: | T. Liebrecht |
| Modifier: | T. Liebrecht | Research group: | vertebrate |
| Created: | 2009-07-13 09:59:49 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | authorizer only | Released: | 2012-07-13 09:59:49 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 30263. | T. Rossmann and M. W. Maisch. 1999. Das Mesosaurier-Material in der Bayerischen Staatssammlung für Paläontologie und Historische Geologie: Übersicht und neue Erkenntnisse. Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Historische Geologie 39:69-83 [J. Mueller/T. Liebrecht] |
Secondary references:
| 30327 | H.-V. Karl, E. Gröning, and C. Brauckmann. 2007. The Mesosauria in the collections of Göttingen and Clausthal: implications for a modified classification. Clausthaler Geowissenschaften 6:63-78 [J. Mueller/T. Liebrecht] | |
| 30341 | T. Rossmann. 2000. Studien an Mesosauriern (Amniota inc sed: Mesosauridae): 2 Neue Erkenntnisse zur Anatomie, mit Berücksichtigung der Taxonomie von Mesosaurus pleurogaster (Seeley). Senckenbergiana lethaea 80(1):13-28 [J. Mueller/T. Liebrecht/T. Liebrecht] | |
| 30355 | T. Rossmann. 2002. Studien an Mesosauriern (Amniota inc sed, Mesosauridae): 3 Neue Aspekte zur Anatomie, Erhaltung und Paläoökologie aufgrund der Exemplare im Paläontologischen Institut der Universität Zürich. [Studies on mesosaurs (Amniota inc sed, Mesosauridae): 3 New aspects on the anatomy, preservation and palaeoecology, based on the specimens from the Palaeontological Institute of the University of Zurich]. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 224(2):197-221 [J. Mueller/T. Liebrecht] |