Antonio da Platina: Capitanian - Wuchiapingian, Brazil
collected by Alberto Erichsen
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Murchisoniina
- Loxonematidae
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| 3 specimens | ||||||||||
| Nos. 19, 22, 23 | ||||||||||
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Bivalvia
- Actinodontida
- Palaeomutelidae
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Palaeoneilo platinensis n. sp.
Reed 1935
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3 specimens | |||||||||
| Nos. 20, 22, 24? | ||||||||||
| 2 specimens | ||||||||||
| Nos. 25, 24a | ||||||||||
| Guerrini et al. 2020 | ||||||||||
| 1 specimen | ||||||||||
| No. 26 | ||||||||||
| Guerrini et al. 2020 | ||||||||||
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Anodontophora morata n. sp.
Reed 1935
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3 specimens | |||||||||
| Nos. 21, 22a, 23 | ||||||||||
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Ostracoda
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| 2 specimens | ||||||||||
| Nos. 28, 29 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | Paraná |
| Coordinates: | 23.3° South, 50.1° West (view map) | ||
| Paleocoordinates: | 32.2° South, 15.4° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Permian | Epoch: | Guadalupian - Lopingian |
| Stage: | Capitanian - Wuchiapingian | 10 m.y. bin: | Permian 4 |
| Key time interval: | Capitanian - Wuchiapingian | ||
| Age range of interval: | 264.28 - 254.14 m.y. ago |
Stratigraphy
| Formation: | Rio do Rasto | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Presence of Palaeomutela platinensis suggests a position in the upper Serrinha or Morro Pelado Member of the Rio do Rasto Formation (Guerrini et al., 2019). From near the transition from Serrinha Member to Morro Pelado Member. In the basal interval of the Rio do Rasto Formation, the Terraia curvata assemblage correlates with those of the Gai-As Formation, in the Huab Basin, Namibia, Africa (David et al. 2011; Simões et al. 2015). In this unit, just above the last occurrences of bivalves, there are volcanic tufs, and radiometric dating of zircon minerals from them yields ages of 265+2.5 Ma, nearly at the Wordian–Capitanian limit, Guadalupian Epoch (Stollhofen et al. 2000). Therefore, the studied assemblages containing Palaeomutela and other endemic bivalves of the Paraná Basin, which are stratigraphically above bivalves of the Terraia curvata assemblage, are probably Capitanian–Wuchiapingian in age. This assumption is in good accord with very recent U–Pb zircon ages acquired using a sensitive high-resolution ion microprobe and an isotope dissolution thermal ionization mass spectrometer (see Rocha Campos et al. 2019) from tuffs, which suggest that the studied interval of the Rio do Rasto Formation was deposited between the Capitanian and Wuchiapingian stages. | |||||
Lithology and environment
| Primary lithology: | "shale" |
| Lithology description: "Soft purplish massive shale or mudstone" | |
| Environment: | lacustrine - large |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | SM |
| Collectors: | Alberto Erichsen |
| Collection method comments: Sent to Reed by Dr. Euzebio de Oliveira | |
Metadata
| Database number: | 209020 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | freshwater |
| Created: | 2020-04-23 19:07:15 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2020-04-23 19:07:15 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 72162. | F. R. C. Reed. 1935. Some Triassic lamellibranchs from Brazil and Paraguay. Geological Magazine 72:33-42 [M. Clapham/M. Clapham] |
Secondary references:
| 72164 | V. B. Guerrini, S. A. Matos, R. Rohn, F. G. Varejão, L. V. Warren and M. G. Simões. 2020. The last chapter of 30 million years of molluscan evolution: Permian non-marine bivalves of the Rio do Rasto Formation, Paraná Basin, Brazil. PalZ 94:487-512 [M. Clapham/M. Clapham/M. Clapham] |