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Whippomorpha or Cetancodonta is a group of artiodactyls that contains all living cetaceans (whales, dolphins, and porpoises) and the hippopotamids. [1] All whippomorphs are descendants of the last common ancestor of Hippopotamus amphibius and Tursiops truncatus. This makes it a crown group. [2]
Anthracotheriidae is a paraphyletic family of extinct, hippopotamus-like artiodactyl ungulates related to hippopotamuses and whales. The oldest genus, Elomeryx, first appeared during the middle Eocene in Asia. They thrived in Africa and Eurasia, with a few species ultimately entering North America during the Oligocene.
This led to some theories that the last common ancestors of hippos and whales was a semiaquatic mammal, but in a 2015 genomic study that compared the genes responsible in aquatic adaptations within Whippomorpha found it to be the result of convergent evolution, as opposed to shared ancestry. This resolves the issue of how hippos and whales ...
On land, a hippo can run up to 19 miles per hour, and their sheer weight and density allow them to push through water with surprising force. In other words, ...
Evolutionary relationships among hippo and Cetacea (whales, dolphins) [11] Until 1909, naturalists classified hippos together with pigs based on molar patterns. Several lines of evidence, first from blood proteins, then from molecular systematics , [ 12 ] DNA [ 13 ] [ 14 ] and the fossil record , show their closest living relatives are ...
Also known as "killer whales," orcas — the largest members of the dolphin or "toothed whales" family, a suborder of cetaceans — are the only known marine predators of white sharks, ...
The earliest known ancestor of arctic whales is Denebola brachycephala from the late Miocene around 9–10 million years ago. [55] A single fossil from Baja California indicates the family once inhabited warmer waters. [27] [56] [57] Acrophyseter skull. Ancient sperm whales differ from modern sperm whales in tooth count and the shape of the ...
A female pygmy hippopotamus calf was born at the Metro Richmond Zoo in early December, marking the third calf of the endangered species to be born at the zoo in the last five years, officials said.