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Salmoniformes. Extinct species. Longjaw cisco (Coregonus alpenae) Coregonus bezola. Coregonus fera. Coregonus gutturosus. Gravenche (Coregonus hiemalis) Deepwater cisco (Coregonus johannae)
Marine mammals comprise over 130 living and recently extinct species in three taxonomic orders. The Society for Marine Mammalogy, an international scientific society, maintains a list of valid species and subspecies, most recently updated in October 2015. [1] This list follows the Society's taxonomy regarding and subspecies.
Oceania is a geographical region in the Pacific Ocean comprising Australasia, Melanesia, Micronesia, and Polynesia. [2][3] Numerous species across Oceania became extinct as humans moved across the Pacific. Australia-New Guinea, New Zealand, and Hawaii have particularly large numbers of extinct species, so they listed in separate articles.
It is considered the most endangered marine mammal in the world. The vaquita has been listed as critically endangered by the IUCN Red List of Threatened Species since 1996. [2] The vaquita is at risk of extinction due to its small population size. [33] [page needed] It was approximated at one point that there were 150 individuals. [21]
Near threatened (NT): 345 species. Least concern (LC): 3,306 species. Data deficient (DD): 872 species. Mammalian species (IUCN, 2020-1) 5850 extant species have been evaluated. 4978 of those are fully assessed [a] 3651 are not threatened at present [b] 1244 to 2116 are threatened [c] 81 to 83 are extinct or extinct in the wild:
Steller's sea cow (Hydrodamalis gigas) is an extinct sirenian described by Georg Wilhelm Steller in 1741. At that time, it was found only around the Commander Islands in the Bering Sea between Alaska and Russia; its range extended across the North Pacific during the Pleistocene epoch, and likely contracted to such an extreme degree due to the glacial cycle.
The list of extinct cetaceans features the extinct genera and species of the order Cetacea. The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, the even-toed ungulates. The earliest cetaceans were still hoofed mammals. These early cetaceans became gradually better adapted for swimming than for walking on land ...
It was the Phanerozoic Eon's largest extinction: 53% of marine families died, 84% of marine genera, about 81% of all marine species [14] and an estimated 70% of terrestrial vertebrate species. [15] This is also the largest known extinction event for insects. [16] The highly successful marine arthropod, the trilobite, became extinct. The ...