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The twenty-eight extant species of Hominoidea are divided into two families: Hominidae, containing five gorilla, chimpanzee, and human species divided into three genera in the subfamily Homininae, and three orangutan species in a single genus in the subfamily Ponginae; and Hylobatidae, containing twenty gibbon species divided into four genera ...
The Hominidae (/ h ɒ ˈ m ɪ n ɪ d iː /), whose members are known as the great apes [note 1] or hominids (/ ˈ h ɒ m ɪ n ɪ d z /), are a taxonomic family of primates that includes eight extant species in four genera: Pongo (the Bornean, Sumatran and Tapanuli orangutan); Gorilla (the eastern and western gorilla); Pan (the chimpanzee and the bonobo); and Homo, of which only modern humans ...
Most species are nocturnal and feed primarily on ants and termites, though other insects may also be taken. Despite only a few pholidotans having population estimates, all eight species are classified as threatened by the IUCN Red List, with three being classified as critically endangered, largely due to intensive poaching of their keratin scales.
There are no rules for how many species should make a genus, a family, or any other higher taxon (that is, a taxon in a category above the species level). [ 52 ] [ 53 ] It should be a natural group (that is, non-artificial, non- polyphyletic ), as judged by a biologist, using all the information available to them.
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.
Genus Arctocephalus – Geoffroy, F. Cuvier, 1826 – eight species Common name Scientific name and subspecies ... and sometimes African penguins and other seabirds [8]
Eight of the extinct bird species were found in Hawaii, including the Po`ouli, which was last seen in 2004. The Po`ouli is the most recently seen species of all 21 animals on the list.
Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million.