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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. [15] [16] River dolphin has been considered a taxonomic description, suggesting an evolutionary relationship among the group, although it is now known that they form two distinct clades.
The Amazon river dolphin is the largest species of river dolphin, with many adult males reaching 185 kilograms (408 lb) in weight, and 2.5 metres (8.2 ft) in length. Adults acquire a pink color, more prominent, in males, giving it its nickname "pink river dolphin".
The Ganges river dolphin split from the Indus river dolphin during the Pleistocene, around 550,000 years ago. [1] The earliest fossil identified as belonging to the species is only 12,000 years old. [12] The Ganges river dolphin was formally classified as Delphinus gangeticus two separate times in 1801, by Heinrich Julius Lebeck [13] and ...
In fact, all extant river dolphin species are endangered or critically endangered, the IUCN says. Researchers discovered the Amazonian dolphin fossil in 2018, near the Napo River in Loreto, Peru.
The baiji (Lipotes vexillifer), is a probably extinct species of freshwater dolphin native to the Yangtze river system in China. It is thought to be the first dolphin species driven to extinction due to the impact of humans. This dolphin is listed as "critically endangered: possibly extinct" by the IUCN, has not been seen in 20 years, and ...
The Amazon Basin is home to two unique species of freshwater dolphins, the Amazon river dolphin, also known as the boto or pink river dolphin, and the tucuxi, a smaller, gray-bodied species.
South Asian river dolphins are toothed whales in the genus Platanista, which inhabit the waterways of the Indian subcontinent.They were historically considered to be one species (P. gangetica) with the Ganges river dolphin and the Indus river dolphin being subspecies (P. g. gangetica and P. g. minor respectively).
Turns out South Carolina’s river dolphins are even more unique than were previously known. New dolphin species discovered along SC coast, study shows. What makes them unique