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Rhinos and tapirs are more closely related to each other than to horses. The separation of horses from other perissodactyls took place according to molecular genetic analysis in the Paleocene some 56 million years ago, while the rhinos and tapirs split off in the lower-middle Eocene, about 47 million years ago.
A rhinoceros (/ r aɪ ˈ n ɒ s ər ə s / ry-NOSS-ə-rəss; from Ancient Greek ῥινόκερως (rhinókerōs) ' nose-horned '; from ῥίς (rhis) ' nose ' and κέρας (kéras) ' horn '; [1] pl.: rhinoceros or rhinoceroses), commonly abbreviated to rhino, is a member of any of the five extant species (or numerous extinct species) of odd-toed ungulates (perissodactyls) in the family ...
Tapiroidea is a superfamily of perissodactyls which includes the modern tapirs and their extinct relatives. Taxonomically, they are placed in suborder Ceratomorpha along with the rhino superfamily, Rhinocerotoidea.
Three perissodactyl species (clockwise from left): plains zebra (Equus quagga), Indian rhinoceros (Rhinoceros unicornis) and South American tapir (Tapirus terrestris) Perissodactyla is an order of placental mammals composed of odd-toed ungulates – hooved animals which bear weight on one or three of their five toes with the other toes either ...
They are the South American tapir, the Malayan tapir, Baird's tapir, and the mountain tapir. In 2013, a group of researchers said they had identified a fifth species of tapir, the kabomani tapir . However, the existence of the kabomani tapir as a distinct species has been widely disputed, and recent genetic evidence further suggests that it ...
Aside from the ever-present threat of poachers, Javan rhinos face other threats. Because there are so few left, there is a lack of genetic diversity in the herd, and only about two males for every ...
Horses and tapirs both evolved in North America; [31] rhinoceroses appear to have developed in Asia from tapir-like animals and then colonised the Americas during the middle Eocene (about 45 Mya). Of the approximately 15 families, only three survive (McKenna and Bell, 1997; Hooker, 2005).
A new study of the gut microbiomes of captive southern white rhinos reveals a plausible cause to health problems that hinder the species’ reproduction. Poking around in rhinoceros poop may turn ...