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Amphibian species (IUCN, 2016-2) 6492 extant species have been evaluated; 4925 of those are fully assessed [a] 2860 are not threatened at present [b] 2063 to 3630 are threatened [c] 35 to 148 are extinct or extinct in the wild: 33 extinct (EX) species [d] 2 extinct in the wild (EW) 113 possibly extinct [CR(PE)] 0 possibly extinct in the wild ...
Critically endangered (CR) species face an extremely high risk of extinction in the wild. As of December 2021, the International Union for Conservation of Nature (IUCN) lists 673 critically endangered amphibian species, including 146 which are tagged as possibly extinct. [1] [2] 9.2% of all evaluated amphibian species are listed as critically ...
This indicates that the last eurypterids died either in the catastrophic extinction event at its end or at some point shortly before it. This extinction event, the Permian–Triassic extinction event, is the most devastating mass extinction recorded, and rendered many other successful Paleozoic groups, such as the trilobites, extinct. [80]
From the pygmy tarsier (a mouse-sized big-eyed animal that weighs almost 60 grams) to the Coelacanth (the closest link between fish and the first amphibian creatures which made the transition from ...
Ichthyosauria [a] is an order of large extinct marine reptiles sometimes referred to as "ichthyosaurs", although the term is also used for wider clades in which the order resides. Ichthyosaurians thrived during much of the Mesozoic era; based on fossil evidence, they first appeared around 250 million years ago ( Ma ) and at least one species ...
Despite the world's last captive thylacine dying in 1936, the secretive animal wasn't declared extinct until 1986. More recently in 2007 the Baiji dolphin , a rare river dolphin native to China ...
However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of ongoing research. Modeling results found that the current extinction rate of amphibians could be 211 times greater than the background extinction rate. This estimate even goes up to 25,000–45,000 times if endangered species ...
Amphibians are in decline worldwide, with 2 out of every 5 species threatened by extinction, according to a paper published Wednesday in the scientific journal Nature. More than 2,000 species of ...