Time：2023-03-27 11:20:08 source：ucutxmastrees.com author：Botanical Garden Read：408次

This bizarre beast is actually a 'whale'

Pictured: Reconstruction of Bucky's Whale Tubucky's whale is an extinct ancient whale and the predecessor of modern whales. Ancient whales, also known as ancient whales, are the ancient whales (or protocetids) in the cetaceans, including the ancestors of modern whales. Traditionally used to generalize prehistoric cetaceans, excluding their surviving descendants to modern times, so this is a paraphyletic group classification, not a natural clade. Ancient whales had hind limbs, unlike today's cetaceans. The earliest ancient whales may have been entirely terrestrial. The reasons for its extinction are still different, and one explanation is that due to climate change, the oceans became too cold, causing the extinction of ancient cetaceans. This article lists several ancient whales, friends can have a preliminary understanding of ancient whales. Pakistani whale Pakicetus, also known as Pakistani whale, is an extinct ancient whale, the predecessor of modern whales, living in Pakistan in the Eocene (52-48 million years ago), hence the name. The stratum where the fossils were found is the coastal part of the Tethys Ocean. The first bucky whale fossil to be discovered was a long skull initially thought to belong to the order Mesoptera, but identified as an early whale due to the features of its inner ear. Therefore, it is a transitional species of extinct land mammals and modern whales. The complete skeleton of Bucky whales was discovered in 2001, showing that they lived primarily on land. Bucky whales are about the size of wolves and look like Mesoclaws. Ichthyolestes, also known as stealing whale or stealing whale, belongs to a genus under the family Buckycetidae. It is an extinct ancient terrestrial mammal and the predecessor of modern whales, which lived 50 million years ago. In the early Eocene, their fossils were found in Pakistan. The walking whale Ambulocetus walking whale, also known as the terrestrial whale and the wandering whale, is a genus of terrestrial whales, and is an early whale that can walk and swim at the same time. The walking whale is a transitional fossil, showing how whales move from land evolved from mammals. Walking whale fossils were found in Pakistan (47-48 million years ago). In the era of walking whales, Pakistan was a coastal area near the ancient Mediterranean. The walking whale looks like a crocodile and is about 3 meters long. Like existing cetaceans, they were probably completely aquatic, swimming by swinging their bodies up and down. Analysis of the chemical composition of the teeth of walking whales shows that they can enter and exit freshwater and marine areas. The walking whale lacks external ears, has a long snout, and has eyes on both sides of the skull. Like the hippo, the orbital position is high. The short forelimbs of walking whales have five fingers, while the longer hind limbs have only four toes: walking whales have very solid arm bones, which means they are well adapted to life in the water but unable to swim quickly, and may be ambush predators. Their pelvis is connected to the vertebrae, similar to land mammals rather than cetaceans. Walking whales and bucky whales lacked a caudal lobe at the tail, which may have served as a rudder, swimming in a manner similar to that of extant otters, and propelling the main part of the fore and hind limbs of the Citation. Himalayan whales Himalayacetus Himalayan whales, a genus of Himalayan whales of the terrestrial cetacean family, lived on the coast of the Tethys Ocean (that is, the ancient Mediterranean Sea) in the Eocene, when the Indian plate did not collide with the Cimmerian continent. Its fossils were found in the Himalayas. Remington whale Remingtonocetus Remington whale, is an extinct early whale, a genus of Remington whale family, living in the middle Eocene 45-43.5 million years ago, fossils were found in India and Pakistan. Kutchicetus Kutchicetus Kutchicetus, also known as Kutchicetus, was an Eocene whale that was able to walk and swim. It is a transitional creature in the evolution of whales from land mammals. Its small size is close to that of today's otters. Artiocetus bear god whale, its scientific name is a combination of cetaceans and artiodactyls, because they have artiocete-like ankles, so they are also called even-hoofed whales. The bear whale lived in the early Lutetian stage 47 million years ago and is one of the oldest protocetidae. Their ankle bones show whales returning to the sea from land, while hippos belong to another branch. Most of the time they live in water, and their developed fore and hind limbs indicate that they are more likely to be found in shallow waters, and even step on land. The fossils of the bear god whale represent the intermediate form of terrestrial ungulates and whales, which further supports the theory of artiodactyla ancestors. Maiacetus, a genus of Procetidae, lived in Pakistan in the middle of the Eocene. The skeleton is about 2.6 meters long and is estimated to have weighed 280-390 kilograms. One specimen is a pregnant female along with her fetus, the first described ancient cetacean fetus. Estimated from the position of the fetuses, they were bred on land. The mother whale represents the transition of land mammals back to the ocean. They inhabit the junction of land and sea, and back and forth between sea and land. Protocetus Protocetus is an extinct ancient whale belonging to the family Protocetidae, living in the middle Eocene (45 million years ago). It is about 2.5 meters long and has rear fins and front fins with toes. They have sharp teeth in their long lower jaws. Unlike the more primitive bucky whale, the proto-whale can fully hear the sound of the water. Rodhocetus Rodhocetus is a genus of Procetidae. The first fossil was found in Balochistan, Pakistan in 2001, and it is estimated to have lived 47 million years ago. The Rhododendron's pelvis was fused with the spine and hind limbs, and had differentiated teeth. Its ankle bone supports a direct link to the evolution of Artiodactyla in Rhododendrons, and disproves many theories that finger whales are derived from Mesotheraps. The trochlea in the ankle structure of Rhodes whales is biaxial, a feature that is only found among mammals in Artiodactyla. Rhodes whales must be semi-aquatic animals with large, webbed hind legs for propelling through the water. Shows the transition of whales from land to sea. The dragon king whale Basilosaurus dragon king whale, also known as the mechanical toothed whale, is an extinct ancient marine mammal, a close relative of modern whales, and is a genus in the dragon king whale family, which lived in the late Eocene 40 million to 35 million years ago. With an average length of 15-18 meters, dragon king whales are characterized by their very slender bodies, which are depicted as the most slender whales because of their unprecedentedly slender vertebrae. Compared with other marine mammals, the dragon king whale is thought to have an unusual movement pattern. The thoracic, loin, sacral and tail vertebrae of the same size imply that the dragon king whale moved in an eel-like manner. Paleontologists are intrigued by their short, degenerate hind limbs, as it could prove that modern whales originally evolved from terrestrial mammals.

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