Itaboraian

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title: "Itaboraian" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["itaboraian", "paleocene-south-america", "paleogene-brazil"] topic_path: "geography/brazil" source: "https://en.wikipedia.org/wiki/Itaboraian" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/d4/Itaboraí_Basin.png" caption="Stratigraphy and location of the Itaboraí Basin.
Crocodile skull indicates ''[[Sahitisuchus]]'' find."] ::

The Itaboraian () 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.

Etymology

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

| relief = 1 | width = 300 | caption = Locations of Itaboraian formations | places = | lat_deg = -22.1 | lon_deg = -41.6 | mark = Orange pog.svg | marksize = 14 | link = Itaboraí Formation | lat_deg = -5.5 | lon_deg = -78.6 | mark = Orange pog.svg | marksize = 10 | link = Chota Formation | lat_deg = 4.488444 | lon_deg = -74.135694 | mark = Orange pog.svg | marksize = 10 | link = Bogotá Formation | lat_deg = 11.089444 | lon_deg = -72.675278 | mark = Orange pog.svg | marksize = 10 | link = Cerrejón Formation | lat_deg = -45.3 | lon_deg = -67.0 | mark = Orange pog.svg | marksize = 10 | link = Koluel Kaike Formation | lat_deg = -26.1 | lon_deg = -65.4 | mark = Orange pog.svg | marksize = 10 | link = Maíz Gordo Formation | lat_deg = -15.7 | lon_deg = -70.2 | mark = Orange pog.svg | marksize = 10 | link = Muñani Formation | lat_deg = -4.1 | lon_deg = -80.9 | mark = Orange pog.svg | marksize = 10 | link = Mogollón Formation | lat_deg = -45.6 | lon_deg = -69.1 | mark = Orange pog.svg | marksize = 10 | link = Las Flores Formation, Austral Basin ::data[format=table] | Formation bold is type | Country | Basin | Notes | |---|---|---|---| | Itaboraí Formation | | Itaboraí Basin | | | Bogotá Formation | | Altiplano Cundiboyacense | | | Cerrejón Formation | | Cesar-Ranchería Basin | | | Chota Formation | | Bagua Basin | | | Koluel Kaike Formation | | Golfo San Jorge Basin | | | Las Flores Formation | | Golfo San Jorge Basin | | | Maíz Gordo Formation | | Salta Basin | | | Mogollón Formation | | Talara & Tumbes Basins | | | Muñani Formation | | Altiplano Basin | | ::

Fossils

::data[format=table]

GroupFossilsFormationNotes
MammalsAsmithwoodwardia 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
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
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
Carodnia inexpectansMogollón
Chulpasia mattaueri, Peradectes austrinum, Perutherium altiplanense, Sillustania quechuense, Umayodus raimondi, Didelphidae indet., ?Didolodontidae indet., Notoungulata sp., Pediomyidae indet., Proteutheria indet.Muñani
BirdsDiogenornis fragilis, Eutreptodactylus itaboraiensis, Itaboravis elaphrocnemoides, Paleopsilopterus itaboraiensisItaboraí
Latidae indet., Siluriformes indet., Tetragonopterinae indet.Muñani
Reptiles &
amphibiansAcherontisuchus guajiraensis, Anthracosuchus balrogus, Carbonemys cofrinii, Cerrejonemys wayuunaiki, Cerrejonisuchus improcerus, Pelomedusoides sp., Puentemys mushaisaensis, Titanoboa cerrejonensisCerrejón
?Madtsoia sp.Koluel Kaike
Notocaiman stromeri[Peñas
Coloradas](penas-coloradas-formation)
Bretesuchus bonaparteiMaíz Gordo
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
Lorosuchus nodosus, Pelomedusoides cf. argentinensisRío Loro
cf. Coniophis sp., ?Roxochelys vilavilensis, Crocodylia indet., ?Leptodactylidae indet.Muñani
FishesDipnoi sp., Elopomorpha sp.Cerrejón
Lepidosiren cf. paradoxa, Ceratodus sp.Muñani
MolluscsBulimulus fazendicusItaboraí
FloraMenispina evidensBogotá
Stephania palaeosudamericanaBogotá, Cerrejón
Malvaciphyllum macondicus, Petrocardium cerrejonense, Petrocardium wayuuorumCerrejón
::

Correlations

::data[format=table title="Itaboraian correlations in [[South American land mammal age|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 | {{Location map+ | South America | Country | Environments | Alluvial-lacustrine | Alluvial-fluvial | Fluvio-lacustrine | Lacustrine | Fluvial | Fluvio-deltaic |

| Volcanic | Yes | |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | relief = 1 | width = 220 | float = center | places = | lat_deg = -22.1 | lon_deg = -41.6 | mark = Orange pog.svg | marksize = 14 | link = Itaboraí Formation | lat_deg = 4.488444 | lon_deg = -74.135694 | mark = Dark Green 004040 pog.svg | marksize = 10 | link = Bogotá Formation | lat_deg = 11.089444 | lon_deg = -72.675278 | mark = Dark Green 004040 pog.svg | marksize = 10 | link = Cerrejón Formation | lat_deg = -45.3 | lon_deg = -67.0 | mark = Pink ff0080 pog.svg | marksize = 10 | link = Koluel Kaike Formation | lat_deg = -26.1 | lon_deg = -65.4 | mark = Orange pog.svg | marksize = 10 | link = Maíz Gordo Formation | lat_deg = -15.7 | | Carodnia | [[File:Orange pog.svg|14px]] | | | | | [[File:Orange pog.svg|14px]] | | | | | | | | | | | | | | | | | | | | | | | | | Gashternia | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | | | | | | | | | | | | | | | | | | | | | | | | | | | | Henricosbornia | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | | | | | | | | | | | | | | | | | | | | | | | | | | | | Victorlemoinea | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Polydolopimorphia | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | [[File:Orange pog.svg|14px]] | | [[File:Orange pog.svg|14px]] | | | | | | | | | | | | | | | | | | | | | | | | | | Birds | [[File:White pog.svg|10px]] | | | | [[File:White pog.svg|10px]] | | | | | | | | | | | | | | | | | | | | | | | | | | Reptiles | [[File:SpringGreen pog.svg|10px]] | | [[File:SpringGreen pog.svg|10px]] | [[File:SpringGreen pog.svg|10px]] | [[File:SpringGreen pog.svg|10px]] | | | [[File:SpringGreen pog.svg|10px]] | | | | | | | | | | | | | | | | | | | | | | | Fish | | | | | [[File:Blue pog.svg|10px]] | | | [[File:Blue pog.svg|10px]] | | | | | | | | | | | | | | | | | | | | | | | Flora | [[File:Green pog.svg|10px]] | | | | | | [[File:Green pog.svg|10px]] | [[File:Green pog.svg|10px]] | | | | | | | | | | | | | | | | | | | | | | ::

References

Bibliography

;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

References

  1. [https://paleodb.org/cgi-bin/bridge.pl?action=displayInterval&interval_no=737 Paleo Database: Itaboraian]
  2. 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. [https://paleobiodb.org/classic/displayCollResults?collection_no=118314 São José de Itaboraí] at [[Fossilworks]].org
  17. [https://paleobiodb.org/classic/displayCollResults?collection_no=38793 São José 700 m] at [[Fossilworks]].org
  18. [https://paleobiodb.org/classic/displayCollResults?collection_no=14205 Cañadón Hondo] at [[Fossilworks]].org
  19. [https://paleobiodb.org/classic/displayCollResults?collection_no=133040 Las Flores] at [[Fossilworks]].org
  20. Antoine et al., 2015
  21. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=333772 ''Carodnia inexpectans''] at [[Fossilworks]].org
  22. Gelfo & Sigé, 2011
  23. [https://paleobiodb.org/classic/displayCollResults?collection_no=132938 Laguna Umayo] at [[Fossilworks]].org
  24. [https://paleobiodb.org/classic/displayCollResults?collection_no=28230 LURMU] at [[Fossilworks]].org
  25. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=39281 ''Diagenornis''] at [[Fossilworks]].org
  26. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=207705 ''Itaboravis''] at [[Fossilworks]].org
  27. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=181131 ''Paleopsilopterus''] at [[Fossilworks]].org
  28. [https://paleobiodb.org/classic/displayCollResults?collection_no=106271 La Puente Pit] at [[Fossilworks]].org
  29. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=296057 ''Anthracosuchus''] at [[Fossilworks]].org
  30. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=217254 ''Notocaiman stromeri''] at [[Fossilworks]].org
  31. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=157980 ''Bretesuchus''] at [[Fossilworks]].org
  32. [https://paleobiodb.org/classic/displayCollResults?collection_no=48091 Itaboraí snakes] at [[Fossilworks]].org
  33. [https://paleobiodb.org/classic/displayCollResults?collection_no=77193 Portland Quarry] at [[Fossilworks]].org
  34. [https://paleobiodb.org/classic/displayCollResults?collection_no=58702 El Cadillal] at [[Fossilworks]].org
  35. Salvador & Simone, 2013, p.7
  36. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=207537 ''Menispina evidens''] at [[Fossilworks]].org
  37. [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=207535 ''Stephania palaeosudamericana''] at [[Fossilworks]].org
  38. [https://paleobiodb.org/classic/displayCollResults?collection_no=134513 Cerrejón 0315] at [[Fossilworks]].org
  39. [https://paleobiodb.org/classic/displayCollResults?collection_no=133598 Coalbeds 100] at [[Fossilworks]].org

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itaboraianpaleocene-south-americapaleogene-brazil