Colloncuran

The Colloncuran (Spanish: Colloncurense) age is a period of geologic time (15.5–13.8 Ma) within the Middle Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Friasian and precedes the Laventan age.^[1]

Etymology

The age is named after the Collón Curá Formation in the Cañadón Asfalto and Neuquén Basins of northern Patagonia, Argentina.

Formations

Locations of Colloncuran formations

Formation bold is type	Country	Basin	Notes
Collón Curá Formation	Argentina	Cañadón Asfalto Basin Neuquén Basin	[2][3]
Castilletes Formation	Colombia	Cocinetas Basin	[4]
Cura-Mallín Group	Chile	Cura-Mallín Basin	[5]
Gran Bajo del Gualicho Formation	Argentina	Colorado Basin	[6]
Nazareno Formation	Bolivia	Tupiza Basin	[7]
Pebas Formation	Brazil  Colombia  Ecuador  Peru	Amazon Basin	[8][9]
Pisco Formation	Peru	Pisco Basin	[10][11]

Fossils

Group	Fossils	Formation	Notes
Mammals	Abderites aisenense, Galileomys colloncurensis, Guiomys unica, Maruchito trilofodonte, cf. Microcardiodon williensis, Patagosmilus goini, Neosteiromys tordillense, ?Neotamandua australis, Propithecia neuquenensis, Protacaremys denisae, Protypotherium colloncurensis, Acarechimys sp., Alloiomys sp., cf. Arctodictis sp., Neoreomys sp., Prolagostomus sp., Cebidae indet., Dasyproctidae indet., Echimyidae indet., Eocardiidae indet., Erethizontidae indet., Stegotheriini indet.	Collón Curá	[12][13] [14][15] [16][17]
	Lycopsis padillai, Hilarcotherium miyou, ?Hyperleptus sp., Astrapotheriidae, Odontoceti, Mysticeti, Glyptodontidae, Pampatheriidae, Macraucheniidae, Proterotheriidae, Leontinidae, Toxodontidae, Interatheriidae, Megatheriidae, Dinomyidae, Sirenia, Sparassodonta	Castilletes	[18][19] [20][21]
	Hegetotherium cerdasensis, Juchuysillu arenalesensis, "Plesiotypotherium" minus, Acarechimys sp., Diadiaphorus sp., ?Neothoracophorus sp., cf. Peltephilus sp., Plesiotypotherium sp., Prolagostomus sp., Propalaehoplophorus sp., Proterotherium sp., Stenotatus sp., ?Acrocyon sp., cf. Xyophorus sp., ?Astrapotheriidae indet., ?Borhyaenidae indet., Chinchillinae n sp., Euphractini indet., Eutatini indet., Interatheriinae indet., Macraucheniidae indet., Megatheriinae indet., Octodontidae indet., Toxodontidae indet.	Nazareno	[22][23] [24][25] [26][27]
	Chavinziphius maxillocristatus, Chimuziphius coloradensis, Incakujira anillodefuego, Messapicetus gregarius, Brachydelphis sp., Monachinae indet., Phocidae indet.	Pisco	[28] [29][30] [31][32]
Birds	Kelenken guillermoi	Collón Curá	[14]
	Aves indet.	Castilletes	[20]
	?Phorusrhacidae indet.	Nazareno	[24]
	Sulidae indet.	Pisco	[32]
Reptiles	Chelonoidis gringorum, Waincophis australis, Boinae indet., Lacertilia indet.	Collón Curá	[15] [33][34]
	Chelus colombiana, Chelonoidis sp., cf. Crocodylus sp., cf. Mourasuchus sp., cf. Purussaurus sp., Alligatoridae indet., Boidae indet., Crocodylidae indet., Eusuchia indet., Gavialoidea indet., Podocnemididae indet.	Castilletes	[20][35] [36][37] [38][39] [40][41] [42][43] [44][45]
	?Testudinidae indet.	Nazareno	[24]
	Pacifichelys urbinai	Pisco	[32]
Fishes	Megalodon, Characidae, Serrasalmidae, Sciaenidae, Sparidae, Sphyraenidae, Ariidae, Callichthyidae, Doradidae, Pimelodidae, Carcharhinidae, Hemigaleidae, Sphyrnidae, Lamnidae, Otodontidae, Dasyatidae, Myliobatidae, Rhinopteridae, Ginglymostomatidae, Pristiophoridae, Pristidae, Rhynchobatidae, Rhynobatidae, Lepidosirenidae	Castilletes	[20][46]
	Nematogenys cuivi	Cura-Mallín	[47]
	Megalodon, Carcharhinus cf. albimarginatus, Carcharhinus cf. brachyurus, Carcharodon hastalis, Galeocerdo cf. contortus, Hemipristis serra, Isurus sp.	Pisco	[32] [48][49]