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Isthminia (named after the Republic of Panama and its people) is a genus of medium-sized river dolphin cetaceans that lived during the Late Miocene epoch in what is now the coasts of Panama, about 6.1 million to 5.8 million years ago. The type species is I. panamensis, known from the littoral Chagres Formation. [1]
Isthminia panamensis is an extinct genus and species of river dolphin, living 5.8 to 6.1 million years ago. Its fossils were discovered near Piña, Panama. Its fossils were discovered near Piña, Panama.
Iniidae is a family of river dolphins containing one living genus, Inia, and four extinct genera.The extant genus inhabits the river basins of South America, but the family formerly had a wider presence across the Atlantic Ocean.
The type species is Horopeta umarere. Isthminia [70] Gen. et sp. nov Valid Pyenson et al. Miocene Chagres Formation Panama. An inioid river dolphin. The type species is Isthminia panamensis. Nanokogia [71] Gen. et sp. nov Valid Velez-Juarbe et al. Late Miocene Chagres Formation Panama. A member of Kogiidae. The type species is Nanokogia isthmia.
The species is facing an extremely high risk of extinction in the wild. VU: Vulnerable: The species is facing a high risk of extinction in the wild. NT: Near threatened: The species does not meet any of the criteria that would categorise it as risking extinction but it is likely to do so in the future. LC: Least concern
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The Chagres Formation is exposed in the northern part of the Panama Canal Zone.The formation overlies and partly overlaps the Gatún Formation.The outcrop area lies entirely west of the Panama Canal, extending from the Canal Zone southwestward along the Caribbean coast, about 45 kilometres (28 mi) southwest of Colón.
Meherrinia is an extinct genus of inioid river dolphin from the Meherrin River, North Carolina, in the United States.First described in 2012, the dolphin is, in most respects, intermediate in form between the living Amazon river dolphin and the La Plata dolphin, although it is probably more closely related to the former.