The word "elephant" is based on the
Latin elephas (genitive elephantis) ("elephant"), which is the
Latinised form of the
Greek ἐλέφας (elephas) (genitive ἐλέφαντος (elephantos)), probably from a non-Indo-European language, likely
Phoenician. It is attested in
Mycenaean Greek as e-re-pa and e-re-pa-to in
Linear B syllabic script. As in Mycenaean Greek,
Homer used the Greek word to mean ivory, but after the time of
Herodotus, it also referred to the animal. The word "elephant" appears in
Middle English as olyfaunt (c.1300) and was borrowed from
Old French oliphant (
12th century). In
Swahili elephants are known as Ndovu or
Tembo. In Sanskrit the elephant is called hastin, while in Hindi it is known as hāthī
Loxodonta, the generic name for the
African elephants, is Greek for "oblique-sided tooth".
Over 161 extinct members and three major evolutionary radiations of the order Proboscidea have been recorded. The earliest proboscids, the African Eritherium and Phosphatherium of the late Paleocene, heralded the first radiation. The Eocene included anthracobunids from the
Indian subcontinent and Numidotherium, Moeritherium and Barytherium from
Africa. These animals were relatively small and aquatic.
Later on, genera such as Phiomia and Palaeomastodon arose; the latter likely inhabited forests and open woodlands. Proboscidean diversity declined during the Oligocene. One notable species of this epoch was
Eritreum melakeghebrekristosi of the
Horn of Africa, which may have been an ancestor to several later species.
The beginning of the
Miocene saw the second diversification, with the appearance of the deinotheres and the mammutids. The former were related to Barytherium, lived in Africa and
Eurasia, while the latter may have descended from Eritreum and spread to
North America.
The second radiation was represented by the emergence of the gomphotheres in the Miocene, which likely evolved from Eritreum and originated in Africa, spreading to every continent except
Australia and
Antarctica. Members of this group included Gomphotherium and Platybelodon. The third radiation started in the late Miocene and led to the arrival of the elephantids, which descended from, and slowly replaced, the gomphotheres.
The African Primelephas gomphotheroides gave rise to Loxodonta, Mammuthus and Elephas. Loxodonta branched off earliest, around the Miocene and Pliocene boundary, while Mammuthus and Elephas diverged later during the early Pliocene. Loxodonta remained in Africa, while Mammuthus and Elephas spread to Eurasia, and the former reached North America. At the same time, the stegodontids, another proboscidean group descended from gomphotheres, spread throughout
Asia, including the Indian subcontinent,
China, southeast Asia and
Japan. Mammutids continued to evolve into new species, such as the
American mastodon.
Source:
Wikipedia
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- published: 26 Nov 2013
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