Rusingoryx

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Rusingoryx
Temporal range: 0.075–0.070  Ma
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Early Pleistocene – Late Pleistocene
Rusingoryx drinking.png
Rusingoryx drinking
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Subfamily: Alcelaphinae
Genus: Rusingoryx
Pickford & Thomas, 1984
Species:
R. atopocranion
Binomial name
Rusingoryx atopocranion
Pickford & Thomas, 1984
Synonyms
  • Megalotragus atopocranionGentry, 2010 (Pickford & Thomas, 1984)

Rusingoryx is a genus of extinct alcelaphine bovid artiodactyl closely related to the wildebeest. It contains only one species, R. atopocranion, that lived on the plains of Kenya during the Pleistocene. [1] It was originally named as a species of Megalotragus .

Rusingoryx is known for its strange pointed nose with a large nasal dome. This structure represents an instance of convergent evolution with the crests of hadrosaurid dinosaurs, which were used for display and vocalization. [1] [2] [3] Studies have shown that the Rusingoryx is a specialized grazing animal, with a preference for arid grasslands. [4] [2] Rusingoryx was migratory. [5]

The first specimens, which were poorly preserved, were described in 1983, having been taken from a site called Bovid Hill on Rusinga Island in Lake Victoria. [3] [6] Butchered bones found in 2011 with stone tools suggested that they had been killed by humans. [4] [2] In 2016, remains of an additional 26 better preserved individuals were discovered.

Related Research Articles

<span class="mw-page-title-main">Ungulate</span> Group of animals that walk on the tips of their toes or hooves

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.

<span class="mw-page-title-main">Bovidae</span> Family of mammals belonging to even-toed ungulates

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.

<span class="mw-page-title-main">Nasal concha</span> Piece of bone in the breathing passage of humans and other animals

In anatomy, a nasal concha, also called a nasal turbinate or turbinal, is a long, narrow, curled shelf of bone that protrudes into the breathing passage of the nose in humans and various other animals. The conchae are shaped like an elongated seashell, which gave them their name. A concha is any of the scrolled spongy bones of the nasal passages in vertebrates.

<span class="mw-page-title-main">Alcelaphinae</span> Subfamily of mammals

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.

<span class="mw-page-title-main">Grévy's zebra</span> Species of zebra

Grévy's zebra, also known as the imperial zebra, is the largest living wild equid and the most threatened of the three species of zebra, the other two being the plains zebra and the mountain zebra. Named after Jules Grévy, it is found in parts of Kenya and Ethiopia. Superficially, Grévy's zebras' physical features can help to identify it from the other zebra species; their overall appearance is slightly closer to that of a mule, compared to the more "equine" (horse) appearance of the plains and mountain zebras. Compared to other zebra species, Grévy's are the tallest; they have mule-like, larger ears, and have the tightest stripes of all zebras. They have distinctively erect manes, and more slender snouts.

<i>Myotragus</i> Extinct genus of mammals

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.

<i>Macrauchenia</i> Extinct genus of litopterns

Macrauchenia is an extinct genus of large ungulate native to South America from the late Pliocene to the end of the Pleistocene. It is a member of the extinct order Litopterna, a group of South American native ungulates distinct from the two orders which contain all living ungulates which had been present in South America since the early Cenozoic, over 60 million years ago, prior to the arrival of living ungulates in South America around 2.5 million years ago as part of the Great American Interchange. The bodyform of Macrauchenia has been described as similar to a camel, being one of the largest known litopterns, with an estimated body mass of around 1 tonne. The genus gives its name to its family, Macraucheniidae, which like Macrauchenia typically had long necks and three toed feet, as well a retracted nasal region, which in Macrauchenia manifests as the nasal opening being on the top of the skull behind the eye sockets. This has historically been argued to correspond to the presence of a tapir-like proboscis, but some recent authors suggest a moose-like prehensile lip or a saiga antelope-like nose to filter dust are more likely.

<span class="mw-page-title-main">Rusinga Island</span> Island in Kenya

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 the new Rusinga-Mbita bridge which replaced the old causeway.

<span class="mw-page-title-main">Blue wildebeest</span> Species of antelope

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.

<i>Metridiochoerus</i> Extinct genus of mammals

Metridiochoerus is an extinct genus of swine known from the Pliocene and Pleistocene of Africa. It is also known as the giant warthog.

<i>Pelorovis</i> Extinct genus of cattle

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.

<i>Megalotragus</i> Extinct genus of mammals

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.

<i>Damaliscus</i> Genus of mammals

Damaliscus, commonly known as damalisks, is a genus of antelope in the family Bovidae, subfamily Alcelaphinae, found in Africa.

<i>Bison latifrons</i> Extinct species of mammal

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 Late Pleistocene epoch ranging from southern Canada to Mexico. It is noted for large body size and its distinctive long horns.

<span class="mw-page-title-main">Hagerman horse</span> Extinct species of mammal

Equus simplicidens, sometimes known as the Hagerman horse or the American zebra is an extinct species in the horse family native to North America during the Pliocene and Early Pleistocene. It is one of the oldest and most primitive members of the genus Equus. It is the state fossil of Idaho, where its abundant remains were discovered in 1928, specifically in Hagerman, Idaho. They are also known from other US states including Arizona, California, Texas, Nebraska and Kansas.

<i>Euthecodon</i> Extinct genus of crocodilian

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.

<i>Syncerus antiquus</i> Extinct species of buffalo

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.

This paleomammalogy list records new fossil mammal taxa that were described during the year 2016, as well as notes other significant paleomammalogy discoveries and events which occurred during that year.

Gazella atlantica, the Atlantic gazelle, is an extinct species of gazelle that lived in Northwest Africa during the Late Pleistocene.

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References

  1. 1 2 Haley D. O'Brien; J. Tyler Faith; Kirsten E. Jenkins; Daniel J. Peppe; Thomas W. Plummer; Zenobia L. Jacobs; Bo Li; Renaud Joannes-Boyau; Gilbert Price; Yue-xing Feng; Christian A. Tryon (2016). "Unexpected Convergent Evolution of Nasal Domes between Pleistocene Bovids and Cretaceous Hadrosaur Dinosaurs". Current Biology. 26 (4): 503–508. doi: 10.1016/j.cub.2015.12.050 . PMID   26853365.
  2. 1 2 3 "Revealed: Rusingoryx, an ancient wildebeest cousin with bizarre dinosaur traits". The Guardian . 5 February 2016. Retrieved 28 March 2016.
  3. 1 2 "Pleistocene Mammal Rusingoryx atopocranion Had Dinosaur-Like 'Nose'". sci-news.com. 5 February 2016. Retrieved 28 March 2016.
  4. 1 2 Faith J. Tyler; et al. (2011). "Taxonomic status and paleoecology of Rusingoryx atopocranion (Mammalia, Artiodactyla), an extinct Pleistocene bovid from Rusinga Island, Kenya" (PDF). Quaternary Research. 75 (3): 697–707. Bibcode:2011QuRes..75..697F. doi:10.1016/j.yqres.2010.11.006. S2CID   17630698.
  5. O’Brien, Kaedan; Podkovyroff, Katya; Fernandez, Diego P.; Tryon, Christian A.; Cerling, Thure E.; Ashioya, Lilian; Faith, J. Tyler (27 May 2024). "Limited herbivore migration during the Last Glacial Period of Kenya". Nature Ecology & Evolution . 8 (6): 1191–1198. doi:10.1038/s41559-024-02413-9. ISSN   2397-334X . Retrieved 30 June 2024.
  6. Gentry A. W. (2010) Bovidae, Cenozoic Mammals of Africa, 747-803