Juan Griego, Margarita Island: Late/Upper Pleistocene, Venezuela
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neritidae
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Neritina virginea
(Linnaeus 1758)
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Gastropoda
- Cerithiidae
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Cerithium variabile
(Adams 1845)
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| synonym of Cerithium lutosum | ||||||||||
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Gastropoda
- Turritellidae
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Turritella variegata
(Linnaeus 1758)
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| recombined as Turritella (Broderiptella) variegata | ||||||||||
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Gastropoda
- Potamididae
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Cerithidea isotoma
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius vibex
(Say 1822)
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Gastropoda
- Neogastropoda
- Melongenidae
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Melongena melongena
(Linnaeus 1758)
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Melongena margaritana n. sp.
Richards 1943
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| synonym of Melongena melongena | ||||||||||
| (2 measurements) | ||||||||||
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Gastropoda
- Neogastropoda
- Marginellidae
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Marginella nivea
Adams 1850
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| synonym of Prunum pruinosum | ||||||||||
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Marginella apicina
Menke 1828
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| recombined as Prunum apicinum | ||||||||||
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Marginella chrysometina
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Bivalvia
- Arcida
- Arcidae
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Arca chemnitzii
Philippi 1851
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Bivalvia
- Cardiida
- Donacidae
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Donax denticulata
(Linnaeus 1758)
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| original and current combination Donax denticulatus | ||||||||||
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Bivalvia
- Cardiida
- Tellinidae
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Tellina venezuelensis n. sp.
Richards 1943
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| (1 measurement) | ||||||||||
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Macoma constricta
(Bruguière 1792)
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Bivalvia
- Cardiida
- Chamidae
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Chama sp.
Linnaeus 1758
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Bivalvia
- Cardiida
- Veneridae
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Gemma gemma
(Totten 1834)
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Bivalvia
- Pholadida
- Corbulidae
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Corbula barrattiana
Adams 1852
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| synonym of Caryocorbula caribaea | ||||||||||
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Corbula cribaria
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| see common names | ||||||||||
Geography
| Country: | Venezuela |
| Coordinates: | 4.9° North, 62.1° West (view map) |
| Paleocoordinates: | 4.9° North, 62.1° West |
| Basis of coordinate: | based on nearby landmark |
| Altitude: | 12 feet |
| Geographic resolution: | outcrop |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Late/Upper Pleistocene | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Late/Upper Pleistocene | ||
| Age range of interval: | 0.12900 - 0.01170 m.y. ago |
Stratigraphy
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: Occurs in proximity to the Pleistocene-Pliocene Falca Sands (Richards 1962) that is 70 m thick. LITHOSTRATIGRAPHY: No lithostratigraphic units named in text. AGE: Pleistocene (Richards 1943, 1962) based on the high proportion of Recent species (89%). Late Pleistocene (Sangamon) age has been suggested by Richards (1938) for a similar fauna from Florida and Cozumel Island, Mexico (Richards, 1935, 1937). STRATIGRAPHIC POSITION: At no place observed do Pleistocene deposits occur higher than 12-15 ft above sea level. | |||||
Lithology and environment
| Primary lithology: | unlithified lime mudstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Unconsolidated limy clay. LITHIFICATION: Unlithified as stated to be unconsolidated and based on figured specimens. | |
| Environment: | coastal indet. |
| Glacial or sequence phase: | transgressive |
| Geology comments: ENVIRONMENT: Definately shallow water, possibly littoral zone. SEQUENCE STRATIGRAPHY: Probably deposited during interglacial, hence transgressive | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | ANSP |
| Collection method comments: COLLECTORS: Collected by H.G. Richards (1939). REPOSITORIES: Collections held in the Academy of Natural Sciences (ANSP) and the Museo de Ciencias Naturales in Caracas, Venezuela. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: An authoratative publication, although somewhat antiquated. However, all occurrences include species-resolution assignments. | |
Metadata
| Database number: | 66753 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-10-15 12:30:07 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | group members | Released: | 2007-10-15 12:30:07 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 19016. | H. G. Richards. 1943. Pleistocene mollusks from Margarita Island, Venezuela. Journal of Paleontology 17(1):120-123 [A. Hendy/A. Hendy] |