Corydoras revelatus

Corydoras revelatus; Temporal range: Late Paleocene,; ~58.5–58.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Life restoration
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Callichthyidae
Genus:	Corydoras
Species:	C. revelatus
Binomial name
	Corydoras revelatus; Cockerell, 1925

Corydoras revelatus is an extinct species of callichthyid catfish known from a single specimen found in Late Paleocene strata of the Mais Gordo Formation in Salta, Argentina. According to chronological dating of the strata, the fossil specimen is about 58.2–58.5 million years old.^[1]^[2]

Compared to modern species, C. revelatus has a short, comparatively rounded head, and rather low-set eyes. Although the species's position within the genus Corydoras is tentative and unresolved, its anatomy confirms that it is a member of the subfamily, Corydoradinae, and demonstrates that the callichthyids had already diverging or diversifying before the end of the Paleocene.^[1]^[2]

Corydoras revelatus is one of the oldest known fossil loricarioids, with the Moroccan Afrocascudo being older, deriving from the Late Cretaceous (Cenomanian, ~100–95 Ma) Kem Kem Group.^[3]

References[edit]

^ ^a ^b Cockerell, T. D. A. (1925-10-30). "A Fossil Fish of the Family Callichthyidae". Science. 62 (1609): 397–398. doi:10.1126/science.62.1609.397.c. ISSN 0036-8075.
^ ^a ^b Lundberg, John G.; Sullivan, John P.; Rodiles-Hernández, Rocío; Hendrickson, Dean A. (2007-06-01). "Discovery of African roots for the Mesoamerican Chiapas catfish, Lacantunia enigmatica, requires an ancient intercontinental passage" (PDF). Proceedings of the Academy of Natural Sciences of Philadelphia. 156 (1): 39–53. doi:10.1635/0097-3157(2007)156[39:DOARFT]2.0.CO;2. ISSN 0097-3157.
^ Brito, Paulo M.; Dutheil, Didier B.; Gueriau, Pierre; Keith, Philippe; Carnevale, Giorgio; Britto, Marcelo; Meunier, François J.; Khalloufi, Bouziane; King, Andrew; de Amorim, Pedro F.; Costa, Wilson J. E. M. (2024). "A Saharan fossil and the dawn of Neotropical armoured catfishes in Gondwana". Gondwana Research. 132: 103–112. doi:10.1016/j.gr.2024.04.008.

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[C.revelatus-1] Cockerell, T. D. A. (1925-10-30). "A Fossil Fish of the Family Callichthyidae". Science. 62 (1609): 397–398. doi:10.1126/science.62.1609.397.c. ISSN 0036-8075.

[Lundberg2007-2] Lundberg, John G.; Sullivan, John P.; Rodiles-Hernández, Rocío; Hendrickson, Dean A. (2007-06-01). "Discovery of African roots for the Mesoamerican Chiapas catfish, Lacantunia enigmatica, requires an ancient intercontinental passage" (PDF). Proceedings of the Academy of Natural Sciences of Philadelphia. 156 (1): 39–53. doi:10.1635/0097-3157(2007)156[39:DOARFT]2.0.CO;2. ISSN 0097-3157.

[Afrocascudo-3] Brito, Paulo M.; Dutheil, Didier B.; Gueriau, Pierre; Keith, Philippe; Carnevale, Giorgio; Britto, Marcelo; Meunier, François J.; Khalloufi, Bouziane; King, Andrew; de Amorim, Pedro F.; Costa, Wilson J. E. M. (2024). "A Saharan fossil and the dawn of Neotropical armoured catfishes in Gondwana". Gondwana Research. 132: 103–112. doi:10.1016/j.gr.2024.04.008.

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