Railroad cut S of Punta Grossa: Artinskian, Brazil
collected by Bross, Dusén
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mesosauridae
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| 17 individuals | ||||||||||
| St1 to St9 (all include skulls); T1 to T38 (T1 to T8 include skulls); minimum number of individuals is estimated from the presence of 17 skulls; see also comments on taxonomic list | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | Paraná |
| Coordinates: | 25.1° South, 50.2° West (view map) | ||
| Paleocoordinates: | 46.8° South, 30.7° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | small collection |
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: | group of beds | ||||
| Stratigraphy comments: "Die fossilführende Schicht von 4 m Dicke befindet sich 2 m oberhalb eines hellgelben Sandsteins, der Geschiebe enthält [The fossiliferous layer is 4 m thick and is 2 m above a light yellow sandstone containing glacial erratics]." (von Huene, 1941).
Von Huene (1941) only gives Permian as the most precise age specification. 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: | "shale" | ||
| Includes fossils? | Y | ||
| Environment: | offshore | Tectonic setting: | cratonic basin |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
| Temporal resolution: | time-averaged |
Collection methods and comments
| Collection methods: | survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Bross, Dusén |
| Collection method comments: "Ein Teil der abgebildeten Schädel wird im Geologischen Museum der Universität Upsala aufbewahrt, und ihre Kautschuk-Abdrücke befinden sich im Riksmuseum zu Stockholm und im Paläontologischen Museum der Universität zu Berkeley in Californien; sie sind hier mit St bezeichnet. Alle anderen Exemplare werden im Geologischen Institut der Universität Tübingen aufbewahrt; sie sind hier mit T bezeichnet [Part of the figured specimens is stored in the Geological Museum of the University of Upsala, and the respective rubber moulds are in the Riksmuseum of Stockholm and in the Paleontological Musuem of the University of Berkeley, California; they are designated with a St. All other specimens are stored in the Geological Department of the University of Tübingen; they are designated with a T]." (von Huene, 1941).
Since von Huene states that the material is in the collections for 30 years, the fossils must have been collected at around 1910. | |
| Taxonomic list comments:Von Huene (1941) does not state to which species the Mesosaurus material belongs. Since he figures some of the material in a slightly earlier publication (von Huene, 1940, Paläont. Z. 22(2), figs. 1-3; figs. 3-7 pls. 6-8) as M. brasiliensis and since all Mesosaurus from Brazil were regarded to belong to M. brasiliensis, this species name is given in the collections taxonomic list. | |
Metadata
| Also known as: | Ponta Grossa; Irati; Iraty | ||
| Database number: | 90573 | ||
| Authorizer: | J. Mueller | Enterer: | T. Liebrecht |
| Modifier: | T. Liebrecht | Research group: | vertebrate |
| Created: | 2009-08-07 07:09:19 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | authorizer only | Released: | 2012-08-07 07:09:19 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 30472. | F. v. Huene. 1941. Osteologie und Systematische Stellung von Mesosaurus. Palaeontographica Abteilung A 92:45-58 [J. Mueller/T. Liebrecht/T. Liebrecht] |