UCMP Locality RV-9502, The Naze, James Ross Island: Early/Lower Maastrichtian, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Michrystridium piliferum
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di Pasquo and Martin 2013 | |||||||||
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Isabellidinium sp.
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di Pasquo and Martin 2013 | |||||||||
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Paleocystodinium pilosum
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di Pasquo and Martin 2013 | |||||||||
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Nummus monoculatus
Morgan 1975
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di Pasquo and Martin 2013 | |||||||||
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Polypodiopsida
- Dicksoniaceae
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Trilites parvallatus
Krutzsch 1959
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di Pasquo and Martin 2013 | |||||||||
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Cyatheacidites annulatus
Cookson 1947
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di Pasquo and Martin 2013 | |||||||||
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Cyatheacidites archangelskii
Dettmann 1986
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di Pasquo and Martin 2013 | |||||||||
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Pteridopsida
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Todisporites sp.
Couper 1958
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di Pasquo and Martin 2013 | |||||||||
| "Todisporites major /T. minor" | ||||||||||
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Angiospermae
- Proteales
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Peninsulapollis gillii
Dettmann and Jarzen 1988
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di Pasquo and Martin 2013 | |||||||||
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Angiospermae
- Fagales
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Nothofagidites sp.
Potonié 1960
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di Pasquo and Martin 2013 | |||||||||
| "spp." | ||||||||||
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Magnoliopsida
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Periporopollenites polyoratus
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di Pasquo and Martin 2013 | |||||||||
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Coniferales
- Podocarpaceae
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Microcachrydites antarcticus
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di Pasquo and Martin 2013 | |||||||||
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Dacrycarpites australiensis
Cookson and Pike 1953
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di Pasquo and Martin 2013 | |||||||||
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Phyllocladidites mawsonii
Cookson 1947
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di Pasquo and Martin 2013 | |||||||||
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Podocarpidites rugulatus
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di Pasquo and Martin 2013 | |||||||||
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Podocarpidites sp.
Cookson 1947
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di Pasquo and Martin 2013 | |||||||||
| "spp." | ||||||||||
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Podocarpidites otagoensis
Couper 1953
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di Pasquo and Martin 2013 | |||||||||
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Sphenopsida
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Calamospora sp.
Schopf et al.
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di Pasquo and Martin 2013 | |||||||||
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Lycopodiopsida
- Lycopodiales
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Retitriletes austroclavatidites
Döring et al. 1963
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di Pasquo and Martin 2013 | |||||||||
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Reptilia
- Dromaeosauridae
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Dromaeosauridae indet.
Colbert and Russell 1969
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1 individual | |||||||||
| limb materials; UCMP276000 | ||||||||||
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= ? Unenlagiinae indet.
Bonaparte 1999
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Ezcurra 2009 | |||||||||
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= Imperobator antarcticus n. gen., n. sp.
Ely and Case 2019
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Ely and Case 2019 | |||||||||
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Reptilia
- Plesiosauria
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Plesiosauroidea indet.
Welles 1943
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del Valle et al. 1977 | 1 specimen | ||||||||
| MLP 78-XI-1-2 | ||||||||||
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unclassified
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Paralecaniella indentata
Cookson and Eisenack 1970
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di Pasquo and Martin 2013 | |||||||||
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Dinophyceae
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Trichodinium castanea
Clarke and Verdier 1967
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di Pasquo and Martin 2013 | |||||||||
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Spiniferites ramosus
Lentin and Williams 1973
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di Pasquo and Martin 2013 | |||||||||
| "S. ramosus (ramosus-multibrevis-granosus) complex" | ||||||||||
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Dinophyceae
- Gonyaulacales
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Batiacasphaera grandis
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di Pasquo and Martin 2013 | |||||||||
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? Batiacasphaera reticulata
Davey 1979
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di Pasquo and Martin 2013 | |||||||||
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Dinophyceae
- Gonyaulacales
- Gonyaulacaceae
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Operculodinium radiculatum
Smith 1992
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di Pasquo and Martin 2013 | |||||||||
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Pterodinium cretaceum
Slimani 2008
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di Pasquo and Martin 2013 | |||||||||
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Dinophyceae
- Peridiniales
- Peridiniaceae
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Isabelidinium cretaceum
Lentin and Williams 1977
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di Pasquo and Martin 2013 | |||||||||
| incl. Isabelidinium cretaceum gravidum | ||||||||||
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Isabelidinium pellucidum
Lentin and Williams 1977
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di Pasquo and Martin 2013 | |||||||||
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Manumiella seelandica
Bujak and Davies 1983
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di Pasquo and Martin 2013 | |||||||||
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Dinophyceae
- Peridiniales
- Protoperidiniaceae
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Phelodinium exilicornutum
Smith 1992
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di Pasquo and Martin 2013 | |||||||||
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unclassified
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Palambages sp.
Wetzel 1961
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di Pasquo and Martin 2013 | |||||||||
| "spp." | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Antarctica |
| Coordinates: | 64.0° South, 57.5° West (view map) |
| Paleocoordinates: | 62.3° South, 68.0° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Early/Lower Maastrichtian | Ammonoid zone: | Diplomoceras lambi |
| Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
| Age estimate: | minimum 71 ± 0.2 Ma (Sr isotope) |
Stratigraphy
| Formation: | Snow Hill Island | Member: | Cape Lamb | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: lower part of member | |||||
Lithology and environment
| Primary lithology: | massive,planar lamination,gray lithified sandstone |
| Secondary lithology: | green,yellow lithified argillaceous,silty mudstone |
| Lithology description: This 91 m section is composed of interbedded, green gray massive and laminated fine-grained quartz sandstones and greenish yellow argillaceous mudstones and siltstones, with thin layers of concretions and bentonite clays dispersed through the section. | |
| Environment: | marginal marine indet. |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils,mesofossils,microfossils |
| Preservation of anatomical detail: | medium |
| Disassociated major elements: | all |
| Fragmentation: | extreme |
| Temporal resolution: | snapshot |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | bulk,surface (float),hydrochloric,hydroflouric,field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | Imperobator-type locality, CICYTTP-Pl 293, AC-26 | ||
| Database number: | 75458 | ||
| Authorizer: | M. Carrano, E. Vlachos, G. Lloyd | Enterer: | M. Carrano, F. Aspromonte, G. Lloyd |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2007-10-10 07:01:20 | Last modified: | 2022-02-10 10:38:53 |
| Access level: | the public | Released: | 2007-10-10 07:01:20 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 25460. | ETE | J. A. Case, J. E. Martin, and M. A. Reguero. 2007. A dromaeosaur from the Maastrichtian of James Ross Island and the Late Cretaceous Antarctic dinosaur fauna. In A. K. Cooper, C. R. Raymond, & the ISAES Editorial Team (eds.), Antarctica: A Keystone in a Changing World. Online Proceedings of the 10th ISAES. United States Geological Survey and the National Academies. USGS Open-File Report 2007-1047, Short Research Paper 083:1-4 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 86992 | R. A. del Valle, F. Medina, and Z. Gasparini. 1977. Nota preliminar sobre el hallazgo de reptiles fósiles marinos del suborden Plesiosauria en las Islas James Ross y Vega, Antártida. Contribución del Instituto Antártico Argentino 212:1-13 [E. Vlachos/F. Aspromonte] | |
| 79686 | M. di Pasquo and J. E. Martin. 2013. Palynoassemblages associated with a theropod dinosaur from the Snow Hill Island Formation (lower Maastrichtian) at the Naze, James Ross Island, Antarctica. Cretaceous Research 45:135-154 [M. Carrano/M. Carrano] | |
| 69696 | R. C. Ely and J. A. Case. 2019. Phylogeny of a new gigantic paravian (Theropoda; Coelurosauria; Maniraptora) from the Upper Cretaceous of James Ross Island, Antarctica. Cretaceous Research 101:1-16 [G. Lloyd/G. Lloyd] | |
| 32412 | ETE | M. D. Ezcurra. 2009. Theropod remains from the uppermost Cretaceous of Colombia and their implications for the palaeozoogeography of western Gondwana. Cretaceous Research 30:1339-1344 [M. Carrano/M. Carrano] |