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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 ...
This is a collection of lists of mammal gestation period estimated by experts in their fields. The mammals included are only viviparous (marsupials and placentals) as some mammals, which are monotremes (including platypuses and echidnas) lay their eggs. A marsupial has a short gestation period, typically shorter than placental.
Hominidae (great ape ancestors) speciate from the ancestors of the gibbon (lesser apes) between c. 20 to 16 Ma. They largely reduced their ancestral snout and lost the uricase enzyme (present in most organisms). [28] 16-12 Ma Homininae ancestors speciate from the ancestors of the orangutan between c. 18 to 14 Ma. [29]
Between around 2 million and 22 million years ago, several dozen species of great apes inhabited Africa, Europe and Asia, fossil records show. Today, only gorillas, chimpanzees, bonobos ...
c. 18–12 Ma – estimated age of the Hominidae/Hylobatidae (great apes vs. gibbons) split. c. 16 Ma – The hippopotamus evolves. c. 15 Ma – First mastodons, bovids, and kangaroos. Australian megafauna diversify. c. 11 Ma – Estimated date for the origin of the modern Yangtze river. c. 10 Ma – Insects diversify. First large horses.
“Its demise is enigmatic considering that it was one of the few Asian great apes to go extinct in the last 2.6 million years, whereas others, including orangutan, survived until the present.”
Gestation, called pregnancy in humans, is the period of time during which the fetus develops, dividing via mitosis inside the female. During this time, the fetus receives all of its nutrition and oxygenated blood from the female, filtered through the placenta , which is attached to the fetus' abdomen via an umbilical cord .
The late Middle Miocene is the farthest trace of a Pierolapithecus-like character group, and assuming that this identifies the earliest apes, is the farthest trace of hominids. As well, early hominids are substantially more primitive than estimated, which may explain why no early great apes were previously reported. [8]
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