Riochican

Geologic age From Wikipedia, the free encyclopedia

The Riochican (Spanish: Riochiquense) age is a period of geologic time (57.0–54.0 Ma) within the Paleocene and Eocene epochs of the Paleogene, used more specifically within the South American land mammal ages (SALMA). It follows the Peligran and precedes the Itaboraian age.[1]

Etymology

This age is named after the Río Chico Group of the Golfo San Jorge Basin.

Formations

Riochican is located in South America
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Locations of Riochican formations
More information Formation bold is type, Country ...
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Fossils

More information Group, Fossils ...
Group Fossils Formation Notes
MammalsEtayoa bacatensisBogotá
Brandmayria simpsoni, Ernestokokenia chaishoer, E. ?yirunhor, Isotemnus cf. primitivus, Palangania brandmayri, Anisolambda sp., Henricosbornia sp., Josepholeidya sp., Notopithecus sp., Othnielmarshia sp., Polydolops winecage, Ricardolydekkeria sp., Trigonostylops sp., Victorlemoinea sp., ?Eohyrax sp., ?Nemolestes sp., ?Notostylops sp., ?Pleurostylodon sp., ?Polystylops sp., ?Postpithecus sp., Dasypodidae indet.Koluel Kaike
Eoastrapostylops riolorense, Notonychops powelli, Satshatemnus bonaparteiRío Loro
Reptiles &
amphibians
Testudines indet.Koluel Kaike
Pelomedusoides sp.Maíz Gordo
Lorosuchus nodosus, Pelomedusoides cf. argentinensisRío Loro
Fishes?Cyprinodon primulusMaíz Gordo
InsectsAnthicus sepultulus, Austrolibellula noroestenia, Carabites harringtoni, Celinapterix bellissima, Cryptophagus sunchalensis, Curculionites harringtoni, C. jujuyensis, C. magdalinus, C. parastictus, C. stebingeri, C. sunchalicus, C. wielandi, Curviarculia delicata, C. lamasi, Gryllites vocalis, Jujusia maizgorda, Latibasalia elongata, L. quispeae, Lebia harrelli, Ormenis devincta, Otiorhynchites aterrimus, O. crassus, Palaeomacromia multicellulata, Palaeophya argentina, Promegalestes singularis, Tenebrionites inclinans, Thyridates novokschonovi, ?Anthonomus sunchalensis, ?Corizus deflagratus, ?Cossonus devoratus, ?Haruspex defectus, ?Molanna derosa, ?Podabrus santaritensis, ?Trichodes stebingeriMaíz Gordo
FloraBanaraphyllum ovatum, Cissites patagonica, Cryptocaryoides mariasantisimensis, Dryophyllum australis, Fagophyllum duseni, Laurophyllum chubutensis, Laurophyllum piatnitzkyi, Myrica premira, Nothofagidites visserensis, Paranymphaea aristolochiaformis, Sterculia acuminataloba, Zizyphus chubutensisRío Chico
Palmoxylon patagonicumBororó
Cordioxylon prototrichotomaPeñas
Coloradas
Palmoxylon patagonicumSalamanca
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References

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