Cabos Tre Puntas - San Julian Fm: Early/Lower Miocene, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Valdesia (Juliana) conica
Valdesia golfina
Patagumbonium australis
Gastropoda
Peonza torquata Olivera 1994
Gastropoda - Trochidae
Gibbula philippi
Calliostoma observationis
Calliostoma puntasium
Gastropoda - Epitoniidae
Cirsotrema rugulosa
Gastropoda - Neotaenioglossa - Calyptraeidae
"Calyptraea" americana
Gastropoda - Newtoniellidae
Ataxocerithium trespunta
Gastropoda - Naticidae
"Polynices" secunda
original and current combination Polinices
"Polynices" jorgensis Ihering 1907
Gastropoda - Neogastropoda - Columbariidae
Columbarium archimedis
Gastropoda - Neogastropoda - Costellariidae
Austromitra patagonica
Gastropoda - Neogastropoda - Mangeliidae
Fusiguraleus pilsbry
spelled with current rank as Neoguraleus (Fusiguraleus)
Gastropoda - Neogastropoda - Turridae
Eoturris jorgensis
synonym of Eopleurotoma
Gastropoda - Neogastropoda - Drilliidae
Antimelatoma cuevensis
Gastropoda - Neogastropoda - Nassariidae
"Fusus" stromeri
Gastropoda - Neogastropoda - Buccinidae
Penion subrecta
? Zelandiella golfina
Gastropoda - Neogastropoda - Volutidae
"Proscaphella" petersoni
synonym of Miomelon
Gastropoda - Turritellidae
"Turritella" ambulacrum Sowerby 1846
Bivalvia - Nuculida - Nuculidae
Lamellinucula crassirugata
spelled with current rank as Nucula (Lamellinucula)
Bivalvia - Nuculanida - Malletiidae
Neilo (Neilo) ornata (Sowerby 1846)
Bivalvia - Arcida - Cucullaeidae
Cucullaea (Monteleonia) plana
Bivalvia - Arcida - Arcidae
Arca puntaensis
Bivalvia - Arcida - Limopsidae
Limopsis insolita (Sowerby 1846)
Bivalvia - Pectinida - Anomiidae
Parinomya juliensis
Bivalvia - Pectinida - Pectinidae
Jorgechlamys juliana
Jorgechlamys centralis (Sowerby 1846)
"Chlamys" nicolasi
Bivalvia - Ostreida - Pinnidae
Pinna (Atrina) magellanica Ihering 1907
Bivalvia - Ostreida - Malleidae
Perna quadrisulcata Ihering 1897
recombined as Isognomon quadrisulcata
Bivalvia - Lucinida - Lucinidae
"Lucina" ortmanni Ihering 1899
Bivalvia - Cardiida - Veneridae
? Ameghinomya darwini Philippi 1887
Ameghinomya darwini Philippi 1887
Pérez et al. 2013
Bivalvia - Cardiida - Cardiidae
"Cardium" patagonicum Ihering 1907
recombined as Hedecardium (Iheringicardium) patagonicum
"Cardium" pisum Philippi 1887
Bivalvia - Carditida - Carditidae
Pleuromeris sulcolunularis
Fasciculicardia inaequalis
original and current combination Glyptoactis (Fasciculicardia)
see common names

Geography
Country:Argentina
Coordinates: 47.1° South, 66.1° West (view map)
Paleocoordinates:47.8° South, 59.6° 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:San Julián
Stratigraphic resolution:group of beds
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From beds of the San Julián Fm, which unconformably overlies the Deseado Fm and is overlain by the Early Miocene Monte Leon Fm. THICKNESS: From multiple beds within formation that reaches a thickness of 80 m. AGE: Late Oligocene-Early Miocene according to molluscan biostratigraphy. Assigned to the Early Miocene based on the the recognition of the JR assemblage. STRATIGRAPHIC POSITION: From uppermost parts of the formation.
Lithology and environment
Primary lithology: poorly lithified sandy "limestone"
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Sandy limestone. LITHIFICATION: Poorly-lithified on the basis of figured specimes.
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:71404
Authorizer:A. Hendy, D. Perez Enterer:A. Hendy, D. Perez
Research group:marine invertebrate
Created:2007-04-24 09:47:33 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2007-04-24 09:47:32
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]

Secondary references:

73175 D. Pérez, C. del Río, and S. Nielsen. 2013. Sistemática y filogenia del género Ameghinomya Ihering, 1907 (Bivalvia: Chioninae) del Cenozoico de Argentina y Chile. Ameghiniana 50(3):354-374 [D. Perez/D. Perez]