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The traditional hypothesis of cetacean evolution, first proposed by Van Valen in 1966, [9] was that whales were related to the mesonychians, an extinct order of carnivorous ungulates (hoofed animals) that resembled wolves with hooves and were a sister group of the artiodactyls (even-toed ungulates). This hypothesis was proposed due to ...
The pygmy right whale shares several characteristics with the right whales, with the exception of having a dorsal fin. Also, pygmy right whales' heads are no more than one quarter the size of their bodies, whereas the right whales' heads are about one-third the size of their bodies. [11] The pygmy right whale is the only extant member of its ...
The New World wolves did not show any gene flow with the boxer, dingo or Chinese indigenous dogs but there was indication of gene flow between the Mexican wolf and the African basenji. [13] All species within the genus Canis, the wolf-like canids, are phylogenetically closely related with 78 chromosomes and can potentially interbreed. [100]
The name Whippomorpha is a combination of English (wh[ale] + hippo[potamus]) and Greek (μορφή, morphē = form). [2]Some attempts have been made to rename the suborder Cetancodonta, due to the misleading utilization of the suffix -morpha for a crown group, [6] as well as the risk of confusion with the clade Hippomorpha (which consists of equid perissodactyls); [7] however Whippomorpha ...
Fossils have revealed an ancient marine reptile with a loosely connected jaw that allowed its throat to balloon out to a massive size so it could filter feed the way right whales do today.
South American foxes look like true foxes, despite being a unique canid genus more closely related to wolves and jackals. [60] Whales exhibit hyperphalangy—an increase in the number of phalanges beyond three phalanges-per-digit. Whales share this characteristic with extinct marine reptiles, but not present-day marine mammals. [61]
Eerie and fascinating, whale songs are one of the most mysterious sounds reverberating through the ocean. Now, researchers say they know how the leviathans vocalize. Mystery of whale song ...
Now, sperm whales are protected under the Marine Mammal Protection Act. So, in order to sell the animal's tooth, it must be over 100 years old, and the owner has to know where it's been since the ...