Wikipedia

Itaboraian

The Itaboraian (Portuguese: Itaboraiense) age is a period within the Early Eocene geologic time (53.0–50.0 Ma) epoch of the Paleogene, used more specifically with South American land mammal ages (SALMA). It follows the Riochican and precedes the Casamayoran age.[1]

Stratigraphy and location of the Itaboraí Basin.
Crocodile skull indicates Sahitisuchus find.

Etymology

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This age is named after the Itaboraí Formation in the Itaboraí Basin in Itaboraí, a Greater Rio municipality in the state of Rio de Janeiro in Brazil not very far away from Niterói.

Formations

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Locations of Itaboraian formations
Formation
bold is type 		Country Basin Notes
Itaboraí Formation   Brazil Itaboraí Basin
[2]
Bogotá Formation   Colombia Altiplano Cundiboyacense
[3]
Cerrejón Formation   Colombia Cesar-Ranchería Basin
[4]
Chota Formation   Peru Bagua Basin
[5][6]
Koluel Kaike Formation   Argentina Golfo San Jorge Basin
[7]
Las Flores Formation   Argentina Golfo San Jorge Basin
[8]
Maíz Gordo Formation   Argentina Salta Basin
[9]
Mogollón Formation   Peru Talara & Tumbes Basins
[10]
Muñani Formation   Peru Altiplano Basin
[11]

Fossils

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Group Fossils Formation Notes
Mammals Asmithwoodwardia scotti, Austropediomys marshalli, Bergqvistherium primigenia, Bobbschaefferia fluminensis, Camargomendesia pristina, Carodnia vieirai, Carolocoutoia ferigoloi, Carolopaulacoutoia itaboraiensis, Colbertia magellanica, Derorhynchus singularis, Didelphopsis cabrerai, Eobrasilia coutoi, Epidolops ameghinoi, Gashternia carioca, Gaylordia macrocynodonta, Gaylordia mater, Guggenheimia brasiliensis, Guggenheimia crocheti, Homalostylops atavus, Itaboraidelphys camposi, Lamegoia conodonta, Marmosopsis juradoi, Miguelsoria parayirunhor, Minusculodelphis minimus, M. modicum, Mirandatherium alipioi, Monodelphopsis travassosi, Palaeocladosictis mosesi, Paranisolambda prodromus, Patene simpsoni, Periprotodidelphis bergqvistae, Procaroloameghinia pricei, Protodidelphis mastodontoides, P. vanzolinii, Protolipterna ellipsodontoides, Ricardocifellia protocenica, Riolestes capricornicus, Riostegotherium yanei, Tetragonostylops apthomasi, Victorlemoinea prototypica, Xenodelphis doelloi, Zeusdelphys complicatus, ?Arminiheringia sp., Henricosbornia sp., Australidelphia indet., Borhyaenidae indet., Didelphidae indet., Didolodontidae indet., Herpetotheriidae indet., Microbiotheriidae indet., Notoungulata indet., Paucituberculata indet., Pediomyidae indet., Peradectidae indet., Polydolopidae indet., Protodidelphidae indet. Itaboraí
[12]
[13][14]
[15]
[2][16]
[17]
Ernestokokenia yirunhor, Gashternia ctalehor, Henricosbornia waitehor, Seudenius cteronc, Shecenia ctirneru, ?Isotemnus ctalego, ?Peripantostylops orehor, ?Polydolops kamektsen, Kibenikhoria sp., Archaeopithecidae indet., Borhyaenidae indet., ?Litopterna indet., ?Notostylopidae indet. Koluel Kaike
[18]
Anisolambda sp., Antepithecus sp., Asmithwoodwardia sp., Bardalestes sp., Bobbschaefferia sp., Camargomendesia sp., Carolopaulacoutoia sp., Colbertia sp., Derorhynchus sp., Didelphopsis sp., Epidolops sp., Ernestokokenia sp., Gashternia sp., Guggenheimia crocheti, Henricosbornia sp., Isotemnus sp., Itaboraitherium sp., Kibenikhoria sp., Marmosopsis sp., Mirandatherium sp., Monodelphopsis sp., Peripantostylops sp., Polydolops sp., Procaroloameghinia pricei, Protodidelphis sp., Shecenia sp., Trigonostylops sp., Victorlemoinea sp., Woodburnodon sp., Ceratodontidae indet., ?Patene indet. Las Flores
[19]
Carodnia inexpectans Mogollón
[20][21]
Chulpasia mattaueri, Peradectes austrinum, Perutherium altiplanense, Sillustania quechuense, Umayodus raimondi, Didelphidae indet., ?Didolodontidae indet., Notoungulata sp., Pediomyidae indet., Proteutheria indet. Muñani
[22]
[23][24]
Birds Diogenornis fragilis, Eutreptodactylus itaboraiensis, Itaboravis elaphrocnemoides, Paleopsilopterus itaboraiensis Itaboraí
[16][25]
[26][27]
Latidae indet., Siluriformes indet., Tetragonopterinae indet. Muñani
[24]
Reptiles &
amphibians		 Acherontisuchus guajiraensis, Anthracosuchus balrogus, Carbonemys cofrinii, Cerrejonemys wayuunaiki, Cerrejonisuchus improcerus, Pelomedusoides sp., Puentemys mushaisaensis, Titanoboa cerrejonensis Cerrejón
[28][29]
?Madtsoia sp. Koluel Kaike
[18]
Notocaiman stromeri Peñas
Coloradas
[30]
Bretesuchus bonapartei Maíz Gordo
[31]
Apodops pricei, Coniophis cf. precedens, Corallus priscus, Hechtophis austrinus, Hoffstetterella brasiliensis, Itaboraiophis depressus, Madtsoia camposi, Paraungaliophis pricei, Paulacoutophis perplexus, Sahitisuchus fluminensis, Waincophis cameratus, Waincophis pressulus, Xenopus romeri, ? Russellophiidae indet. Itaboraí
[32][33]
Lorosuchus nodosus, Pelomedusoides cf. argentinensis Río Loro
[34]
cf. Coniophis sp., ?Roxochelys vilavilensis, Crocodylia indet., ?Leptodactylidae indet. Muñani
[24]
Fishes Dipnoi sp., Elopomorpha sp. Cerrejón
[28]
Lepidosiren cf. paradoxa, Ceratodus sp. Muñani
[24]
Molluscs Bulimulus fazendicus Itaboraí
[35]
Flora Menispina evidens Bogotá
[36]
Stephania palaeosudamericana Bogotá, Cerrejón
[37]
Malvaciphyllum macondicus, Petrocardium cerrejonense, Petrocardium wayuuorum Cerrejón
[38][39]

Correlations

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Itaboraian correlations in South America
Formation Itaboraí Las Flores Koluel Kaike Maíz Gordo Muñani Mogollón Bogotá Cerrejón Ypresian (IUCS) • Wasatchian (NALMA)
Bumbanian (ALMA) • Mangaorapan (NZ)
Basin Itaboraí Golfo San Jorge Salta Altiplano Basin Talara &
Tumbes		 Altiplano
Cundiboyacense		 Cesar-Ranchería
Itaboraian (South America)
Country   Brazil   Argentina   Peru   Colombia
Carodnia    
Gashternia      
Henricosbornia      
Victorlemoinea    
Polydolopimorphia        
Birds    
Reptiles          
Fish    
Flora      
Environments Alluvial-lacustrine Alluvial-fluvial Fluvio-lacustrine Lacustrine Fluvial Fluvio-deltaic
  Itaboraian volcanoclastics

  Itaboraian fauna

  Itaboraian flora
Volcanic Yes

References

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  1. ^ Paleo Database: Itaboraian
  2. ^ a b Oliveira & Goin, 2011
  3. ^ Bayona et al., 2012, p.103
  4. ^ Jaramillo et al., 2007, p.168
  5. ^ Chacaltana et al., 2015, p.2
  6. ^ Castro Medina, 2010, p.53
  7. ^ Raigemborn et al., 2010, p.251
  8. ^ Raigemborn et al., 2010, p.249
  9. ^ Narváez, 2009, p.24
  10. ^ Quispe Alcalá, 2010, p.21
  11. ^ Gelfo & Goin, 2011
  12. ^ Oliveira et al., 2016
  13. ^ Carneiro et al., 2018
  14. ^ Carneiro, 2018
  15. ^ De Oliveira & Goin, 2015
  16. ^ a b São José de Itaboraí at Fossilworks.org
  17. ^ São José 700 m at Fossilworks.org
  18. ^ a b Cañadón Hondo at Fossilworks.org
  19. ^ Las Flores at Fossilworks.org
  20. ^ Antoine et al., 2015
  21. ^ Carodnia inexpectans at Fossilworks.org
  22. ^ Gelfo & Sigé, 2011
  23. ^ Laguna Umayo at Fossilworks.org
  24. ^ a b c d LURMU at Fossilworks.org
  25. ^ Diagenornis at Fossilworks.org
  26. ^ Itaboravis at Fossilworks.org
  27. ^ Paleopsilopterus at Fossilworks.org
  28. ^ a b La Puente Pit at Fossilworks.org
  29. ^ Anthracosuchus at Fossilworks.org
  30. ^ Notocaiman stromeri at Fossilworks.org
  31. ^ Bretesuchus at Fossilworks.org
  32. ^ Itaboraí snakes at Fossilworks.org
  33. ^ Portland Quarry at Fossilworks.org
  34. ^ El Cadillal at Fossilworks.org
  35. ^ Salvador & Simone, 2013, p.7
  36. ^ Menispina evidens at Fossilworks.org
  37. ^ Stephania palaeosudamericana at Fossilworks.org
  38. ^ Cerrejón 0315 at Fossilworks.org
  39. ^ Coalbeds 100 at Fossilworks.org

Bibliography

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Itaboraí Formation
Bogotá Formation
Cerrejón Formation
Chota Formation
Las Flores Formation
Koluel Kaike Formation
Maíz Gordo Formation
Mogollón Formation
Muñani Formation
Peñas Coloradas Formation
Río Loro Formation
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