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  2. Amphibian - Wikipedia

    en.wikipedia.org/wiki/Amphibian

    The numbers of species cited above follows Frost and the total number of known (living) amphibian species as of March 31, 2019, is exactly 8,000, [11] of which nearly 90% are frogs. [ 12 ] With the phylogenetic classification, the taxon Labyrinthodontia has been discarded as it is a polyparaphyletic group without unique defining features apart ...

  3. Portal:Amphibians - Wikipedia

    en.wikipedia.org/wiki/Portal:Amphibians

    Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods excluding the amniotes (tetrapods with an amniotic membrane , such as modern reptiles , birds and mammals ).

  4. List of amphibians - Wikipedia

    en.wikipedia.org/wiki/List_of_amphibians

    A list of amphibians organizes the class of amphibian by family and subfamilies and mentions the number of species in each of them. The list below largely follows Darrel Frost 's Amphibian Species of the World ( ASW ), Version 5.5 (31 January 2011).

  5. Frog - Wikipedia

    en.wikipedia.org/wiki/Frog

    In 2006, of 4,035 species of amphibians that depend on water during some lifecycle stage, 1,356 (33.6%) were considered to be threatened. This is likely to be an underestimate because it excludes 1,427 species for which evidence was insufficient to assess their status. [201] Frog populations have declined dramatically since the 1950s.

  6. List of organisms by chromosome count - Wikipedia

    en.wikipedia.org/wiki/List_of_organisms_by...

    The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various plants, animals, protists, and other living organisms.This number, along with the visual appearance of the chromosome, is known as the karyotype, [1] [2] [3] and can be found by looking at the chromosomes through a microscope.

  7. Reptile - Wikipedia

    en.wikipedia.org/wiki/Reptile

    The optimum body temperature range varies with species, but is typically below that of warm-blooded animals; for many lizards, it falls in the 24–35 °C (75–95 °F) range, [74] while extreme heat-adapted species, like the American desert iguana Dipsosaurus dorsalis, can have optimal physiological temperatures in the mammalian range, between ...

  8. More than 2,000 species of amphibians are threatened by ...

    www.aol.com/news/more-2-000-species-amphibians...

    More than 2,000 species of amphibians are threatened by extinction. Evan Bush. October 4, 2023 at 11:00 AM. ... The number of threatened species has grown by nearly 3% since 1980, as habitat loss ...

  9. Amphibian Species of the World - Wikipedia

    en.wikipedia.org/wiki/Amphibian_Species_of_the_World

    Amphibian Species of the World 6.2: An Online Reference (ASW) is a herpetology database. It lists the names of frogs, salamanders and other amphibians , which scientists first described each species and what year, and the animal's known range.