Loxodonta exoptata Temporal range: Pliocene | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Proboscidea |
Family: | Elephantidae |
Genus: | Loxodonta |
Species: | †L. exoptata |
Binomial name | |
†Loxodonta exoptata (Dietrich, 1941) | |
Loxodonta exoptata is an extinct species of elephant in the genus Loxodonta , from Africa. A 2009 study suggested that Loxodonta exoptata gave rise to L. atlantica , which gave rise to L. africana . [1] The molars of L. exoptata are distinguished from later loxodonts by the lower plate number and their specialized enamel loops. [2] Fossil remains of L. exoptata have been found at Pliocene sites in eastern Africa including Hadar, Laetoli and Koobi Fora. [2]
Elephantidae is a family of large, herbivorous proboscidean mammals collectively called elephants and mammoths. These are large terrestrial mammals with a snout modified into a trunk and teeth modified into tusks. Most genera and species in the family are extinct. Only two genera, Loxodonta and Elephas, are living.
The African forest elephant is one of the two living species of African elephant. It is native to humid tropical forests in West Africa and the Congo Basin. It is the smallest of the three living elephant species, reaching a shoulder height of 2.4 m. As with other African elephants, both sexes have straight, down-pointing tusks, which begin to grow once the animals reach 1–3 years old. The forest elephant lives in highly sociable family groups of up to 20 individuals. Since they forage primarily on leaves, seeds, fruit, and tree bark, they have often been referred to as the 'megagardener of the forest'; the species is one of many that contributes significantly to maintaining the composition, diversity and structure of the Guinean Forests of West Africa and the Congolese rainforests. Seeds of various plants will go through the elephant's digestive tract and eventually pass through in the animal's droppings, thus helping to maintain the spread and biodiversity of the forests.
Hadar or Hadar Formation is a paleontological fossil site located in Mille district, Administrative Zone 1 of the Afar Region, Ethiopia, 15 km upstream (west) of the A1 road's bridge across the Awash River.
Mellivora is a genus of mustelids that contains the honey badger or ratel (Mellivora capensis). It is also the sole living representative of the subfamily Mellivorinae. Additionally, two extinct species are known. The honey badger is native to much of Africa and South Asia, while fossil relatives occurred in those areas and Southern Europe.
African elephants are members of the genus Loxodonta comprising two living elephant species, the African bush elephant and the smaller African forest elephant. Both are social herbivores with grey skin. However, they differ in the size and colour of their tusks as well as the shape and size of their ears and skulls.
The Awash is a major river of Ethiopia. Its course is entirely contained within the boundaries of Ethiopia and empties into a chain of interconnected lakes that begin with Lake Gargori and end with Lake Abbe on the border with Djibouti, some 100 kilometres from the head of the Gulf of Tadjoura. It is the principal stream of an endorheic drainage basin covering parts of the Amhara, Oromia and Somali Regions, as well as the southern half of the Afar Region.
The Afar Triangle is a geological depression caused by the Afar Triple Junction, which is part of the Great Rift Valley in East Africa. The region has disclosed fossil specimens of the very earliest hominins; that is, the earliest of the human clade, and it is thought by some paleontologists to be the cradle of the evolution of humans. The Depression overlaps the borders of Eritrea, Djibouti and the entire Afar Region of Ethiopia; and it contains the lowest point in Africa, Lake Assal, Djibouti, at 155 m (509 ft) below sea level.
Australopithecus bahrelghazali is an extinct species of australopithecine discovered in 1995 at Koro Toro, Bahr el Gazel, Chad, existing around 3.5 million years ago in the Pliocene. It is the first and only australopithecine known from Central Africa, and demonstrates that this group was widely distributed across Africa as opposed to being restricted to East and southern Africa as previously thought. The validity of A. bahrelghazali has not been widely accepted, in favour of classifying the specimens as A. afarensis, a better known Pliocene australopithecine from East Africa, because of the anatomical similarity and the fact that A. bahrelghazali is known only from 3 partial jawbones and an isolated premolar. The specimens inhabited a lakeside grassland environment with sparse tree cover, possibly similar to the modern Okavango Delta, and similarly predominantly ate C4 savanna foods—such as grasses, sedges, storage organs, or rhizomes—and to a lesser degree also C3 forest foods—such as fruits, flowers, pods, or insects. However, the teeth seem ill-equipped to process C4 plants, so its true diet is unclear.
Motty was the only proven hybrid between an Asian and an African elephant. The male calf was born in Chester Zoo, to Asian mother Sheba and African father Jumbolino. He was named after George Mottershead, who founded the Chester Zoo in 1931.
Aramis is a village and archaeological site in north-eastern Ethiopia, where remains of Australopithecus and Ardipithecus have been found. The village is located in Administrative Zone 5 of the Afar Region, which is part of the Afar Sultanate of Dawe, with a latitude and longitude of 10°30′N40°30′E, and is part of the, Carri Rasuk, Xaale Faagê Daqaara.
Yohannes Haile-SelassieAmbaye is an Ethiopian paleoanthropologist. An authority on pre-Homo sapiens hominids, he particularly focuses his attention on the East African Rift and Middle Awash valleys. He was curator of Physical Anthropology at the Cleveland Museum of Natural History from 2002 until 2021, and now is serving as the director of the Arizona State University Institute of Human Origins. Since founding the institute in 1981, he has been the third director after Donald Johanson and William Kimbel.
Mammuthus subplanifrons is the oldest representative of the genus Mammuthus, known from around 6.2-3.75 million years ago during the late Miocene-early Pliocene in what is today South Africa and countries of East Africa, especially Ethiopia. They already presented some of the unique characteristics of mammoths like the spirally, twisting tusks.
Primelephas is a genus of Elephantinae that existed during the Miocene and Pliocene epochs. The name of the genus suggests 'first elephant'. These primitive elephantids are thought to be the common ancestor of Mammuthus, the mammoths, and the closely allied genera Elephas and Loxodonta, the Asian and African elephants, diverging some 4-6 million years ago. It had four tusks, which is a trait not shared with its descendants, but common in earlier proboscideans. The type species, Primelephas gomphotheroides, was described by Vincent Maglio in 1970, with the specific epithet indicating the fossil specimens were gomphothere-like. Primelephas korotorensis is the only other species to be assigned to the genus. All fossils found of the Primelephas have been found in Africa, primarily in modern day Chad, Tanzania, Kenya, Ethiopia, and Uganda.
The African bush elephant, also known as the African savanna elephant, is one of two extant African elephant species and one of three extant elephant species. It is the largest living terrestrial animal, with bulls reaching an average shoulder height of 3.04–3.36 metres (10.0–11.0 ft) and a body mass of 5.2–6.9 tonnes (11,500–15,200 lb), with the largest recorded specimen having a shoulder height of 3.96 metres (13.0 ft) and an estimated body mass of 10.4 tonnes (22,900 lb).
Loxodonta adaurora is an extinct species of elephant in the genus Loxodonta, that of the African elephants. Fossils of Loxodonta adaurora have only been found in Africa, where they developed in the Pliocene. L. adaurora was presumed to be the genetic antecedent of the two modern African elephant species; however, an analysis in 2009 suggested that L. africana evolved from L. atlantica. The same study concluded that Loxodonta adaurora was morphologically indistinguishable from Mammuthus subplanifrons and that these constituted the same species probably within the mammoth lineage. However, other authors have continued to consider L. adaurora a valid species of Loxodonta, with some considering it an early morph of Loxodonta exoptata.
The Daka calvaria, otherwise known as the Dakaskull, or specimen number BOU-VP-2/66, is a Homo erectus specimen from the Daka Member of the Bouri Formation in the Middle Awash Study Area of the Ethiopian Rift Valley.
Jon Kalb August 17, 1941 - October 27, 2017 was a research geologist with the Vertebrate Paleontology Laboratory, University of Texas at Austin. He received a pre-doctoral fellowship from the Carnegie Geophysical Laboratory in 1968, a graduate fellowship from Johns Hopkins University in 1969, and a BSc from American University in 1970.
Loxodonta atlantica is an extinct African species of elephant in the genus Loxodonta. It was larger than modern African elephants, with more progressive dentition. It includes Pleistocene fossils from Ternifine, Algeria, Middle Pleistocene fossils from Elandsfontein, South Africa and Late Pliocene fossils from the Omo River, Ethiopia. It is suggested to have an extinction date of around 400,000 years ago, during the Middle Pleistocene. L. atlantica has been suggested to have probably derived from L. adaurora; or L. exoptata. It is likely ancestral to the living African bush elephant, L. africana, with which it coexisted during the Middle Pleistocene prior to its extinction. The species is divided into two subspecies: L. atlantica atlantica and L. atlantica zulu. The type for Loxodonta atlantica is housed in the Muséum national d'histoire naturelle in Paris, but is listed without a specimen number.
Pliopapio is an extinct genus of Old World monkey known from the latest part of the Miocene to the early Pliocene Epochs from the Afar Region of Ethiopia. It was first described based on a very large series of fossils from the site of Aramis in the Middle Awash, which has been dated by 40Ar/39Ar to 4.4 million years old. It has since been found from similarly aged sediments at Gona, approximately 75 km to the North. Additional fossils from the Middle Awash extend its known time range back to at least 5.3 million years ago. There is only one known species, Pliopapio alemui.