Kallamedu Field Site: Late/Upper Maastrichtian, India
collected by G. V. R. Prasad, A. Goswami & Dept. of Geology, National College, Tiruchirapalli 2007, 2009–2010
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Actinopteri
- Lepisosteiformes
- Lepisosteidae
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Lepisosteidae indet.
Cuvier 1825
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8 specimens | |||||||||
| 8 isolated ganoid scales (DUGF/59–66) | ||||||||||
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Reptilia
- Abelisauridae
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Abelisauridae indet.
Bonaparte and Novas 1985
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5 elements | |||||||||
| Five isolated teeth (DUGF/53–57) | ||||||||||
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Reptilia
- Troodontidae
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Troodontidae indet.
Gilmore 1924
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Goswami et al. 2013 | 1 specimen | ||||||||
| One isolated tooth (DUGF/52) | ||||||||||
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Reptilia
- Crocodyliformes
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Crocodylia indet.
(Owen 1842)
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4 elements | |||||||||
| Three isolated teeth (DUGF/49–51) and one osteoderm (DUGF/58). | ||||||||||
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= Crocodyliformes indet.
Hay 1930
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Rio and Mannion 2021 | |||||||||
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Reptilia
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cf. Simosuchus sp.
Buckley et al. 2000
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1 specimen | |||||||||
| One isolated multicuspid tooth | ||||||||||
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Reptilia
- Testudines
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Testudines indet.
Batsch 1788
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| Several fragmentary pieces of carapace and one vertebral element | ||||||||||
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Amphibia
- Temnospondyli
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Anura indet.
(Fischer von Waldheim 1813)
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1 specimen | |||||||||
| fragmentary right ilium (DUGF/47) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | India | State/province: | Tamil Nadu | County: | Ariyalur |
| Coordinates: | 11.1° North, 79.1° East (view map) | ||||
| Paleocoordinates: | 34.0° South, 57.0° East | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | local area |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Late/Upper Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Lithology and environment
| Primary lithology: | red sandy claystone |
| Secondary lithology: | sandstone |
| Includes fossils? | Y |
| Lithology description: Bright red clays overlain by a friable sandstone containing many sandy nodules and interspersed with sandy clays. | |
| Environment: | pond |
| Geology comments: Coastal setting with a minor marine influence at the base; Interpreted as a freshwater pond deposit | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | surface (in situ),sieve,field collection | ||
| Rock censused: | 300 kg | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | G. V. R. Prasad, A. Goswami & Dept. of Geology, National College, Tiruchirapalli | Collection dates: | 2007, 2009–2010 |
| Collection method comments: DUGF, Delhi University, Geology Department, Fossil Catalogue, Delhi, India
Surface prospecting was undertaken in a large exposure of the Kallamedu Formation (Fig. 1) during expeditions in 2007, 2009 and 2010, which revealed a large concentration of highly fragmentary large bones that likely represent dinosaur taxa and have been previously identified as titanosaur sauropods. In addition, microsites with concentrations of ganoid fish scales, turtle carapace fragments, and abelisaurid theropod and crocodilian teeth were identified during surface prospecting. | |||
Metadata
| Database number: | 153666 | ||
| Authorizer: | P. Mannion, M. Carrano | Enterer: | J. Tennant, P. Mannion, M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2014-01-06 07:58:15 | Last modified: | 2019-09-18 10:26:53 |
| Access level: | the public | Released: | 2014-01-06 07:58:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 49733. | G. V. R. Prasad, O. Verma, J. J. Flynn and A. Goswami. 2013. A new Late Cretaceous vertebrate fauna from the Cauvery Basin, South India: implications for Gondwanan paleobiogeography. Journal of Vertebrate Paleontology 33(6):1260-1268 [P. Mannion/J. Tennant] |
Secondary references:
| 46418 | A. Goswami, G. V. R. Prasad, O. Verma, J. J. Flynn, and R. B. J. Benson. 2013. A troodontid dinosaur from the latest Cretaceous of India. Nature Communications 4:1-5 [P. Mannion/J. Tennant] | |
| 78086 | J. P. Rio and P. D. Mannion. 2021. Phylogenetic analysis of a new morphological dataset elucidates the evolutionary history of Crocodylia and resolves the long-standing gharial problem. PeerJ 9:e12094:1-156 [P. Mannion/P. Mannion] | |
| 70253 | O. Verma. 2015. Cretaceous vertebrate fauna of the Cauvery Basin, southern India: Palaeodiversity and palaeobiogeographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology 431:53-67 [M. Carrano/M. Carrano] |