L-OB-LC - middle Monte Leon Fm: Early/Lower Miocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Reticulochlamys proxima
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Reticulochlamys zinsmeisteri
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Lahilla patagonica
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Valdesia (Valdesia) cuevensis
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris (Glycymeris) pseudocuevensis
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Bivalvia
- Arcida
- Cucullaeidae
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Cucullaea (Monteleonia) alta
Sowerby 1846
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Bivalvia
- Ostreida
- Ostreidae
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Crassostrea hatcheri
(Ihering 1899)
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Bivalvia
- Pectinida
- Pectinidae
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Jorgechlamys juliana
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Bivalvia
- Carditida
- Carditidae
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Fasciculicardia inaequalis
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| original and current combination Glyptoactis (Fasciculicardia) | |||||||
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Pleuromeris sp.
Conrad 1867
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Pleuromeris cruzensis
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Bivalvia
- Lucinida
- Lucinidae
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Pteromyrtea crucialis
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Bivalvia
- Pholadida
- Pholadidae
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Pholadidea patagonica
(Philippi 1887)
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Bivalvia
- Cardiida
- Veneridae
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Ameghinomya meridionalis
Sowerby 1846
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Dosinia meridonalis
Ihering 1897
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Retrotapes striatolamellata
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Austrocallista iheringi
(Cossmann 1898)
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea regularis
(Ortmann 1900)
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| recombined as Panopea (Panopea) regularis | |||||||
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Gastropoda
- Opisthobranchia
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? Priscaphander patagonica
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Gastropoda
- Epitoniidae
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Cirsotrema rugulosa
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Gastropoda
- Turritellidae
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"Turritella" ambulacrum
Sowerby 1846
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Gastropoda
- Naticidae
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"Polynices" subtenuis
Ihering 1907
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| recombined as Polinices subtenuis | |||||||
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Gastropoda
- Neogastropoda
- Volutomitridae
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Neoimbricaria patagonica
(Ihering 1897)
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Gastropoda
- Neogastropoda
- Mitridae
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Austroimbricaria quemadensis
(Ihering 1897)
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Gastropoda
- Neogastropoda
- Volutidae
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"Proscaphella" gracilior
(Ihering 1896)
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| synonym of Miomelon gracilis | |||||||
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Gastropoda
- Struthiolariidae
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Struthiolarella multinodosa
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Struthiolarella ameghinoi
(Ihering 1897)
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Struthiolarella cuevensis
Camacho and Zinsmeister 1989
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Struthiolarella patagoniensis
Camacho and Zinsmeister 1989
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Crepidula gregaria
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| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 50.2° South, 68.9° West (view map) |
| Paleocoordinates: | 51.0° South, 62.3° West |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early/Lower Miocene | ||
| Age range of interval: | 23.03000 - 15.98000 m.y. ago |
Stratigraphy
| Formation: | Monte Leon Fm | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From middle beds of the Monte Leon Fm. THICKNESS: From multiple beds within part of formation of around 60 m. AGE: Early Miocene according to molluscan biostratigraphy. Assigned to the early Early Miocene based on the the recognition of the upper RSP assemblage. STRATIGRAPHIC POSITION: From upper middle part of the formation. | |||||
Lithology and environment
| Primary lithology: | poorly lithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Sandstone. LITHIFICATION: Poorly-lithified on the basis of figured specimens. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Environmental data not reported in text. Siliciclastic shallow marine assemblage. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection,survey of museum collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: COLLECTOR: List includes both new collections by the author, and examination of museum and previously reported taxa. REPOSITORY: Museo Argentino de Ciencias Naturales Bernadino Rivadavia, Buenos Aires, Argentina. | |
| Taxonomic list comments:COVERAGE: Exhaustive for bivalvia and gastropoda. NOMENCLATURE: Not an authoritaive publication, but providing revised generic placement for many previously reported antiquated names. | |
Metadata
| Database number: | 71543 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-28 18:31:46 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2007-04-28 18:31:45 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 12860. | C. J. del Rio. 2004. Tertiary Marine Molluscan Assemblages of Eastern Patagonia (Argentina): A Biostratigraphic Analysis. Journal of Paleontology 78(6):1097-1122 [L. Ivany/P. Wall/P. Wall] |