''Arganodus'' is an extinct genus of Ceratodontidae (lungfish). Its

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

s have been found in the

Redonda Formation The Redonda Formation is a geologic formation exposed in eastern New Mexico.Dobrovolny and Summerson 1947 It contains vertebrate fossils of the late Triassic Period.Griggs and Read 1959 Fossil theropod tracks have been reported from the formation ...

New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ker ...

, the

Tacuarembó Formation The Tacuarembó Formation is a Late Jurassic (Kimmeridgian) geologic formation of the eponymous department in northern Uruguay. The fluvial to lacustrine sandstones, siltstones and mudstones preserve ichnofossils, turtles, crocodylomorphs, fish a ...

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

, and the Cumnock Formation,

North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...

, although the North Carolinian specimens are smaller than most recorded specimens. Fossils have also been uncovered in the

Petrified Forest National Park Petrified Forest National Park is an American national park in Navajo County, Arizona, Navajo and Apache County, Arizona, Apache counties in northeastern Arizona. Named for its large deposits of petrified wood, the park covers about , encompassin ...

. It was first named by Martin in

1979 Events January * January 1 ** United Nations Secretary-General Kurt Waldheim heralds the start of the ''International Year of the Child''. Many musicians donate to the ''Music for UNICEF Concert'' fund, among them ABBA, who write the song ...

, and contains two species, ''A. dorotheae'' and ''A. atlantis''. In 1984, Martin described ''Arganodus tiguidiensis'' from

Elrhaz Formation The Elrhaz Formation is a geological formation in Niger, central Africa. Its strata date back to the Early Cretaceous, about 125 to 112 million years ago. Dinosaur remains are among the fossils that have been recovered from the formation, alongsi ...

Niger ) , official_languages = , languages_type = National languagesCenomanian The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the s ...

. Later, this species was assigned to the genus '' Asiatoceratodus'' by Kemp (1998).Kemp, A. 1998. Skull structure in post-paleozoic lungfish. Journal of Vertebrate Paleontology, 18(1): 43-63.

Paleoecology

''Arganodus'' was probably similar to modern lungfish, and lived in underwater burrows during dry periods until

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal oscil ...

s occurred.

References

External links

''Arganodus''
at the

Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ...

''Arganodus''
at Zipcodezoo.com
The Geographic Distribution and Biostratigraphy of Late Triassic-Early Jurassic Freshwater Fish Faunas of the Southwestern United States

Preliminary Review of the Early Jurassic (Hettangian) Fresh Water Lake Dixie Fish Fauna in the Whitmore Pointmemeber, Moenave Formation in Southwest Utah

Prehistoric lungfish genera Late Triassic first appearances Late Jurassic genus extinctions Triassic bony fish Jurassic bony fish Norian life Kimmeridgian life Triassic fish of North America Prehistoric fish of South America Jurassic vertebrates of South America Jurassic Uruguay Fossils of Uruguay Fossil taxa described in 1979 {{paleo-lobefinned-fish-stub