Ungulates are members of the diverse clade Euungulata which primarily consists of large mammals with hooves. Once part of the clade "Ungulata" along with the clade Paenungulata, "Ungulata" has since been determined to be a polyphyletic and thereby invalid clade based on molecular data. As a result, true ungulates had since been reclassified to the newer clade Euungulata in 2001 within the clade Laurasiatheria while Paenungulata has been reclassified to a distant clade Afrotheria. Living ungulates are divided into two orders: Perissodactyla including equines, rhinoceroses, and tapirs; and Artiodactyla including cattle, antelope, pigs, giraffes, camels, sheep, deer, and hippopotamuses, among others. Cetaceans such as whales, dolphins, and porpoises are also classified as artiodactyls, although they do not have hooves. Most terrestrial ungulates use the hoofed tips of their toes to support their body weight while standing or moving. Two other orders of ungulates, Notoungulata and Litopterna, both native to South America, became extinct at the end of the Pleistocene, around 12,000 years ago.
In zoology, megafauna are large animals. The most common thresholds to be a megafauna are weighing over 46 kilograms (100 lb) or weighing over a tonne, 1,000 kilograms (2,205 lb). The first of these include many species not popularly thought of as overly large, and being the only few large animals left in a given range/area, such as white-tailed deer, Thomson's gazelle, and red kangaroo.
The Bovidae comprise the biological family of cloven-hoofed, ruminant mammals that includes cattle, yaks, bison, buffalo, antelopes, sheep and goats. A member of this family is called a bovid. With 143 extant species and 300 known extinct species, the family Bovidae consists of 11 major subfamilies and thirteen major tribes. The family evolved 20 million years ago, in the early Miocene.
The subfamily Alcelaphinae, of the family Bovidae, contains the wildebeest, tsessebe, topi, hartebeest, blesbok and bontebok, and several other related species. Depending on the classification, there are 6–10 species placed in four genera, although Beatragus is sometimes considered a subgenus of Damaliscus, while Sigmoceros is sometimes considered for the Lichtenstein's hartebeest.
Glyptodonts are an extinct subfamily of large, heavily armoured armadillos. They arose in South America around 48 million years ago and spread to southern North America after the continents became connected around 2.7 million years ago. The best-known genus within the group is Glyptodon. They became extinct approximately 11,000 years ago at the end of the Pleistocene, following the arrival of humans to the Americas.
Myotragus is an extinct genus of goat-antelope in the tribe Caprini which lived on the Balearic Islands of Mallorca and Menorca in the western Mediterranean until its extinction around 4,500 years ago. The fossil record of Myotragus on the Balearic Islands extends over 5 million years back to the early Pliocene on Mallorca, where it presumably arrived after the evaporation of the Mediterranean Sea during the Messinian Salinity Crisis.
Rusinga Island, with an elongated shape approximately 10 miles (16 km) from end to end and 3 miles (5 km) at its widest point, lies in the eastern part of Lake Victoria at the mouth of the Winam Gulf. Part of Kenya, it is linked to Mbita Point on the mainland by a causeway.
The blue wildebeest, also called the common wildebeest, white-bearded gnu or brindled gnu, is a large antelope and one of the two species of wildebeest. It is placed in the genus Connochaetes and family Bovidae, and has a close taxonomic relationship with the black wildebeest. The blue wildebeest is known to have five subspecies. This broad-shouldered antelope has a muscular, front-heavy appearance, with a distinctive, robust muzzle. Young blue wildebeest are born tawny brown, and begin to take on their adult coloration at the age of 2 months. The adults' hues range from a deep slate or bluish-gray to light gray or even grayish-brown. Both sexes possess a pair of large curved horns.
Metridiochoerus is an extinct genus of swine known from the Pliocene and Pleistocene of Africa. It is also known as the giant warthog.
Pelorovis is an extinct genus of African wild cattle which existed during the Pleistocene epoch. The best known species is Pelorovis oldowayensis from Olduvai Gorge in Tanzania, from the Early Pleistocene. The species "Pelorovis" antiquus from the Late Pleistocene-Holocene has since been moved into Syncerus, the same genus as living African buffalo.
Megalotragus was a genus of very large extinct African alcelaphines that occurred from the Pliocene to early Holocene. Its skull resembled that of modern hartebeests, but it differed in having a larger body size and wildebeest-like proportions. Megalotragus includes some of the largest bovid species in the subfamily Alcelaphinae, reaching a shoulder height of 1.4 m (4.6 ft). The genus consists of three species of which Megalotragus priscus survived until the early Holocene 7.500 C14yBP.
Bison latifrons, also known as the giant bison or long-horned bison, is an extinct species of bison that lived in North America during the Pleistocene epoch ranging from Alaska to Mexico. It was the largest and heaviest bovid ever to live in North America. It thrived in North America for about 200,000 years, but became extinct some 20,000–30,000 years ago, at the beginning of the last glacial maximum.
Euthecodon is an extinct genus of long-snouted crocodile. It was common throughout much of Africa during the Neogene, with fossils being especially common in Kenya, Ethiopia, and Libya. Although superficially resembling that of gharials, the long snout was a trait developed independently from that of other crocodilians and suggests a diet of primarily fish. Euthecodon coexisted with a wide range of other crocodiles in the areas it inhabited before eventually going extinct during the Pleistocene.
Syncerus antiquus is an extinct species of buffalo from the Late Pleistocene and Holocene of Africa. It was one of the largest species in its family, potentially weighing up to 2,000 kilograms (4,400 lb). Due to this fact, it is sometimes known as the African giant buffalo. The time of its extinction is of debate; Syncerus antiquus either became extinct at the end of the Late Pleistocene about 12,000 years ago or during the Holocene, some 4,000 years ago.
Rusingaceros or Dicerorhinus leakeyi is an extinct genus of rhinocerotine rhinoceros known from the Miocene of Rusinga Island, Kenya.
The narrow-nosed rhinoceros, also known as the steppe rhinoceros is an extinct species of rhinoceros that lived in western Eurasia and North Africa during the Pleistocene. It first appeared in Europe some 600,000 years ago, and survived there until as recently as 40,000 years Before Present.
Enhydriodon is an extinct genus of mustelids known from Africa, Pakistan, and India that lived from the late Miocene to the early Pleistocene. It contains 9 confirmed species, 2 debated species, and at least a few other undescribed species from Africa. The genus belongs to the tribe Enhydriodontini in the otter subfamily Lutrinae. Enhydriodon means “otter tooth” in Ancient Greek and is a reference to its dentition rather than to the Enhydra genus, which includes the modern sea otter and its two prehistoric relatives.
Damaliscus hypsodon is an extinct species of antelope from the Late Pleistocene of Africa. Fossils have been found in Kenya and Tanzania.
The Hiwegi Formation is a geological formation on Rusinga Island in Kenya preserving fossils dating to the Early Miocene period. The Hiwegi Formation is known for the well preserved plant fossils it preserves, which indicate a tropical forest environment that underwent wet and dry periods. The middle members of the formation in particular indicate a brief period in which conditions were notably dryer with a more open environment compared to older and younger units. Some of the formation's fauna, such as an early ancestor of the modern aye-aye and a chameleon of the genus Calumma, link Miocene East Africa to modern day Madagascar.
Megaherbivores are large terrestrial herbivores that can exceed 1,000 kg (2,200 lb) in weight. This polyphyletic group of megafauna includes elephants, rhinos, hippos, and giraffes. The largest bovids occasionally reach a weight of 1 tonne, but they are generally not considered to be megaherbivores. There are nine extant species of megaherbivores living in Africa and Asia. The African bush elephant is the largest extant species with bulls reaching a height of up to 3.96 m (13.0 ft) and a maximum weight of 10,400 kg (22,900 lb).
