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[15] [11] Major behavioural differences between bonobos and chimpanzees were first discussed in detail by Tratz and Heck in the early 1950s. [16] Unaware of any taxonomic distinction with the common chimpanzee, American psychologist and primatologist Robert Yerkes had already noticed an unexpected major behavioural difference in the 1920s. [17]
The chimpanzee's arms are longer than its legs. The male common chimp stands up to 1.2 m (3.9 ft) high. Male adult wild chimps weigh between 40 and 60 kg [33] [34] [35] with females weighing between 27 and 50 kg. [34] When extended, the common chimp's long arms span one and a half times the body's height. [6]
Sumatran orangutan (Pongo abelli) Hominoidea is a superfamily of primates. Members of this superfamily are called hominoids or apes, and include gorillas, chimpanzees, orangutans, gibbons, bonobos, and humans. Hominoidea is one of the six major groups in the order Primates. The majority are found in forests in Southeastern Asia and Equatorial Africa, with the exception of humans, which have ...
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Duplications of small parts of chromosomes have been the major source of differences between human and chimpanzee genetic material; about 2.7% of the corresponding modern genomes represent differences, produced by gene duplications or deletions [failed verification], since humans and chimpanzees diverged from their common evolutionary ancestor.
According to Meinelt, it was an intentional decision by zoo officials to bring in bonobos rather than chimpanzees, recognizing the need to raise awareness about the lesser-known species and to ...
They comprise two extant genera: Homo and Pan (chimpanzees and bonobos), and in standard usage exclude the genus Gorilla , which is grouped separately within subfamily Homininae. The term Hominini was originally introduced by Camille Arambourg (1948), who combined the categories of Hominina and Simiina pursuant to Gray 's classifications (1825).
The split between the common ancestors of the chimpanzee and bonobos then took place about 1.5 to 2 million years ago with the two lineages giving rise to the two current extant species. In the past, bonobos were incorrectly relegated to subspecies status within the species chimpanzee. It is now understood that bonobos are an entirely different ...