Pictured: A restoration of bucky whales
Bucky whales are extinct ancient whales, the precursors of modern whales.
Ancient whales, also known as ancient whales, are the ancestors of the cetacean order ( or protocerates ) of the cetacean order , including modern whales. Traditionally used to summarize prehistoric cetaceans, but not their descendants who survived to modern times, it is therefore a cohologic taxonomy, not an evolutionary branch of nature.
Ancient whales had hind limbs, unlike today's cetaceans. The earliest ancient whales may have been entirely on land. The cause of its extinction is still widely debated, but one explanation is that due to climate change, the oceans have become too cold, resulting in the extinction of ancient cetaceans.
This article lists several ancient whales,
Friends can have a preliminary understanding of ancient whales.
Bucky Whale
Pakicetus
The genus Bucky whale, also known as the Pakistani whale, is an extinct ancient whale, the predecessor of the modern whale, which lived in Pakistan during the Eocene (52-48 million years ago), hence the name. The strata in which fossils were found were the coastal parts of the Tethys Ocean.
The first Bucky whale fossil found was a long skull that was originally thought to belong to the order Middle Claw, but was identified as an early whale because of the characteristics of its inner ear. It is therefore a transitional species of extinct land mammals and modern whales.
The intact skeleton of Bucky whales was discovered in 2001, showing that they lived mainly on land. Bucky whales are about the size of wolves and look a lot like mid-clawed mammals.
Beast of fish
Ichthyolestes
The fish-in-the-fish beast, also known as the fish-stealing whale or the fish-stealing whale, belongs to a genus of the Bucky whale family, an extinct ancient terrestrial mammal, a precursor to the modern whale, that lived 50 million years ago in the early Eocene, whose fossils were found in Pakistan.
Walking whales
Ambulocetus
Walking whales, also known as chocobo whales, wandering whales, is a genus of cercopods, is an early whale that can walk and swim at the same time, walking whales are transitional fossils, showing how whales evolved from land mammals. Fossil walking whales were found in Pakistan (47-48 million years ago). In the time of the whale walker, Pakistan was a coastal area of the near-ancient Mediterranean.
The walking whale looks like a crocodile and is about 3 meters long. Probably a completely aquatic animal like the existing cetacean, it swims forward by swinging its body up and down. Analysis of the chemical composition of the teeth of the walking whale shows that it can enter and exit freshwater and marine areas. The whale lacks external ears, has a long snout, and has eyes on both sides of the skull, and is located in a high orbit like a hippopotamus.
The shorter forelimbs of the walking whales have five fingers, while the longer hindlimbs have only four toes: the walking whales have very strong arm bones, which means that they are very adapted to life in the water but cannot swim quickly, and may be ambush predators. Their pelvis is connected to the vertebrae and resembles terrestrial mammals rather than cetaceans. The tails of walking whales and bucky whales lack tail lobes and may have been used as rudders, swimming in a manner similar to that of existing otters, and the propulsion part is dominated by the forelimbs of the award.
Himalayan whales
Himalayacetus
Himalayan whales, a genus of Himalayan whales of the chocopod family, lived off the coast of the Tethys Ocean (i.e., the Paleo-Mediterranean) in the Eocene, when the Indian plate did not collide with the continent of Cinmelya. Its fossils were found in the Himalayas.
Remington Whale
Remingtonocetus
Remington whale is an extinct early whale, a genus in the Remington cetacean family, that lived in the middle Eocene 45-43.5 million years ago, and fossils were found in India and Pakistan.
Whale
Kutchicetus
Kuchi whales, also known as Kaqu whales, were Eocene whales that were able to walk and swim. It is a transitional organism for the evolution of whales from land mammals. It was small in size and close to today's otters.
Bear Whale
Artiocetus
Bear god whale, its scientific name is a combination of cetaceans and even-hoofed order, because they have ankles similar to even-hoofed orders, so they are also called even-hoofed whales. The Ursa Whale lived 47 million years ago in the early Lutai Order and is one of the oldest protoceraceae. Their ankle bones show that whales return to the sea from land, while hippos belong to another branch. They live in the water most of the time, and their well-developed forelimbs show that they are more likely to haunt shallow waters, even stepping on land. The fossils of ursi whales represent the intermediate morphology of terrestrial ungulates and whales, which further supports the theory of the ancestors of the even-hoofed order.
Mother whale
Maiacetus
The mother whale is a genus of the protoceraceae that lived in Pakistan in the middle Eocene. The skeleton is about 2.6 meters long and weighs an estimated 280-390 kg.
One specimen is a pregnant female along with her fetus, the first to be described as a fetal specimen of the order Palaeoca. From the location of the fetuses, it is estimated that they reproduce on land. The mother whale represents the transition of land mammals back to the ocean. They inhabit the border between land and sea, back and forth between ocean and land.
Proto whale
Protocetus
Protocluca, an extinct ancient whale belonging to the protocerca family, lived in the middle Eocene (45 million years ago). It is about 2.5 meters long and has a posterior fin with toes for the front fin. They have sharp teeth in their long jaws. Unlike the more primitive Bucky whales, the original whales can fully hear the sounds in the water.
Rhodes Whale
Rodhocetus
The first fossil of Rhodes, a genus of protoceraceae, was discovered in 2001 in Balochistan, Pakistan, and is estimated to have lived 47 million years ago.
The pelvic bones of the Rhodes whale have fused with the spine and hind limbs and have differentiated teeth. Its ankle bone supports the direct connection between the evolution of the Rhodes whale as a homozygous order and overturns many theories that the whale is derived from the order Mesozoite. The scooter in the ankle structure of the Rhodes whale is biaxial, and only the even-hoofed order has this characteristic in mammals. Rhodes whales are certainly semi-aquatic animals with large and webbed hind limbs for propulsion in the water. The transition of whales from land to sea is shown.
Dragon King Whale
Basilosaurus
The Dragon King Whale, also known as the Toothed Whale, is an extinct ancient marine mammal, a close relative of modern whales, a genus in the Family Cetaceae that lived in the late Eocene 40 million to 35 million years ago.
The average length of the Dragon King Whale is 15-18 meters, and the most prominent feature is that the body is very slender, because they have an unprecedented slender vertebrae, so they are depicted as the slenderest whales. In contrast to other marine mammals, the Dragon King Whale is thought to have an unusual way of moving. The vertebrae of the same size chest, waist, and tail mean that the Draco Whale moves in an eel-like manner. Paleontologists are intrigued by their degenerate short hindlimbs because it could show that modern whales originally evolved from terrestrial mammals.