All kinds of dinosaurs with names, their description. Dinosaurs (alphabetically) Species of dinosaurs and their names

  - † Dinosaurs Skeletons of various dinosaurs ... Wikipedia

When Dinosaurs Ruled The Earth ... Wikipedia

This article is proposed for deletion. An explanation of the reasons and the corresponding discussion can be found on the Wikipedia page: On deletion / August 8, 2012. While the discussion process ... Wikipedia

  -? † Dinosaurs Tyrannosaurus Skeleton Scientific Classification Kingdom: Animals ... Wikipedia

Barnum Brown Barnum Brown D ... Wikipedia

  -? † Edmontosaurus ... Wikipedia

English Ice Age: Dawn of the Dinosaurs ... Wikipedia

  -? † Dromomeron Dinosauromorphs ... Wikipedia

  -? † Pittacosaurs ... Wikipedia

The request "Bird" is redirected here; see also other values. Birds 18 ... Wikipedia

Books

• Giant children's illustrated dictionary, Alekseeva Varvara Konstantinovna, Likso Vyacheslav Vladimirovich, Vaitken Lyubov Dmitrievna. Of which only encyclopedias have not been written - about technology, animals, space, great people, grandiose historical events. And much more about that! But there is a special type of universal encyclopedia, in ...
• A large children's illustrated dictionary about everything in the world, Andrei Mernikov, Vyacheslav Likso, Lyubov Dmitrievna Vaitken, Alekseeva Varvara Konstantinovna. Of which only encyclopedias have not been written - about technology, animals, space, great people, grandiose historical events. And much more about that! But there is a special type of universal encyclopedia, in ...
• A large children's illustrated dictionary about everything in the world, VK Alekseeva. No encyclopedias have been written - about technology, animals, space, great people, grandiose historical events. And much more about that! But there is a special type of universal encyclopedia, in ...

1. Triceratops (Triceratops horridus)

Triceratops is a herbivorous dinosaur that lived on Earth at the end of the Cretaceous in the regions of North America.

Being herbivores, Triceratops fed on shrubs and plants, such as ferns, palm trees, and cicadeides. These herbivorous dinosaurs had beak-like mouths that could basically only grab food rather than bite. Interestingly, these dinosaurs had up to 800 teeth that served solely to grab vegetation.

An interesting fact - many of them had horns.

2. Dracorex († Dracorex hogwartsia)

Dracorex is a herbivorous dinosaur that existed during the Late Cretaceous. This dinosaur reached 1.4 meters in height, 6.2 meters in length and weighed about 45 kg. Drakoreks was the owner of the original long mouth. Numerous spikes and bumps were located on his skull.

It is still being debated whether this dinosaur is a herbivore or not. Dracorex had extremely sharp teeth with many fangs,

therefore, some scholars classify it as omnivorous.

Its name is Dracorex hogwartsia - taken from the popular Harry Potter book series by J.K. Rowling. As you understand, this name means "dragon-king of Hogwarts."

3. Moschops († Moschops capensis)

Moskhops is a genus of the prehistoric herbivore mammal of the reptile that existed during the Permian period. Most of the remains of the Moskhops were excavated in a region called Karu in South Africa.

In this habitat, Moschops was the largest herbivore. He had a massive

body (about 5 meters in length), a thick skull and a very short, but heavy tail.

As mentioned above, this dinosaur had a herbivorous lifestyle, so its teeth had serrations at its ends - this helped to chew plants.

4. Argentinosaurus († Argentinosaurus huinculensis)

The next herbivore dinosaur on this list is the Argentinosaurus, which was arguably the largest and most massive terrestrial animal that has ever existed. The Argentinosaurus led a herbivorous lifestyle, as it fed on plants that grew on our planet during the Jurassic period and until the end of the Cretaceous. He had a long neck, allowing easy access to the tops of trees.

Literally, the name of this dinosaur means “silver lizard”. Argentinian dinosaur fossils were first excavated in South America in 1988. Unfortunately, very little information is known about this species of dinosaur.

5. Stegosaurus († Stegosaurus)

Stegosaurus, as you know, is a genus of herbivorous dinosaurs that mainly settled in areas of western North America in the late Jurassic period.

This herbivorous dinosaur is characterized by a toothless beak and small teeth on the inside of its cheeks. It follows that such teeth were not suitable for eating animal flesh. Unlike other herbivorous dinosaurs, which had strong jaws and teeth for grinding plant mass, this dinosaur had jaws that allowed teeth to move only up and down.

Among dinosaurs, the Stegosaurus is known for having a relatively small brain, and perhaps even for having the lowest brain-body ratio.

This dinosaur, whose name literally means "covered lizard", is remembered due to the presence of plates that lay along its back in a vertically flattened position. In total, this dinosaur had 17 original spikes on its back (they are called forceps), which were not solid as such, but consisted of soft bone material, where many blood vessels passed.

6. Edmontosaurus († Edmontosaurus regalis)

Next on this list is the edmontosaurus. It is characterized by the presence of a coracoid mouth, short limbs and a very long pointed tail.

7. Diplodocus († Diplodocus longus)

Diplodocus is considered one of the longest land animals that have ever existed.

The fossils of this herbivorous dinosaur showed that these animals existed in the late Jurassic period. Most of their fossils have been excavated in the Rockies in the western United States.

Due to its huge size, in order to survive, Diplodocus also required a huge amount of plant material. Scientists suggested that his blunt teeth functioned to cut plants, as a diplodocus swallowed whole food without even chewing.

It is interesting to know that, having such dimensions and body structure, this dinosaur did not have the ability to raise its long neck above five meters from the ground.

8. Hadrosaurus († Hadrosaurus foulkii)

Literally means “strong lizard”. The hadrosaur is a genus of herbivorous dinosaurs that lived in parts of North America in the late Cretaceous.

The hadrosaur had a mouth in the form of a beak and a jaw, which were designed to grind plant matter, such as pine needles and cones.

It is also important to note that only one skeleton of this dinosaur has ever been found. This fossil lacked a skull; therefore, it was difficult for scientists to analyze the appearance of the hadrosaur.

9. Nodosaurus († Nodosaurus textilis)

Another famous herbivorous dinosaur is the Nodosaurus, which is very notable for its “armor”.

This dinosaur was a herbivore. He had a rather narrow head with an elongated mouth. Interestingly, the nodosaurus had cavities in the skull that separated the jaws from its nasal passages, thus making it capable of eating and breathing at the same time.

Individuals of this genus existed from the late Jurassic period until the early Cretaceous. Interestingly, at that time the lands of Alabama were divided into two parts: the northern part was covered with forests, and the southern one was covered with small lakes.

10. Ankylosaurus († Ankylosaurus magniventris)

The name comes from other Greek. ??????? ??????, which means "bent pangolin." Ankylosaurus is a genus of armored dinosaur that existed in parts of the western United States and Canada in the late Cretaceous.

Like the Stegosaurus, this massive dinosaur had a body also covered with bone plates (called “shields”). These scutes grew on different places in the dinosaur's body, such as the neck, back, and hips.

This dinosaur was a herbivore that fed on low-lying vegetation. The coracoid mouth allowed the animal to pluck leaves from plants. In addition, studies have shown that he could swallow a huge number of plants without even chewing.

Each of us is familiar with the classic dinosaur names, such as the Stegosaurus, the Apatosaurus and the Tyrannosaurus Rex, which is often simply called the tyrex (T. rex). These Mesozoic fossils were widely known in the late XIX - early XX centuries, when they first began to be exhibited in museums.

But where did these names come from? And how did the lesser-known dinosaur names come about - Spinops, Bistahieversor and Pantydraco? Let's try to figure out what scientists are guided by choosing official names for their favorite pangolins \u003e\u003e

At the dawn of paleontology, the question was simply solved - by adding to the keyword the Greek ending -saurus (–saurus), that is, in fact, the lizard. The very first dinosaur to be officially named back in 1824 was the megalosaurus (Megalosaurus), or "huge lizard." True, the dinosaur following the time of description in 1825 was called the iguanodon (Iguanodon), that is, literally "iguana tooth". But still the vast majority of dinosaurs that became famous in the 19th century received names ending in -zavr.

The first part of the typical dinosaur name, traditionally dating back to Latin or Greek roots, usually emphasizes the main feature of ancient animals. For example, when in 1877, Yale paleontologist Otniel Marsh (O.C. Marsh) came up with the name Stegosaurus, which means “rooftop,” he proceeded from the erroneous assumption that the back plates of this dinosaur formed a fragile outer cover. The other godson of Marsch - Triceratops (Triceratops) - also has a description of his own appearance, enclosed in the name. After all, the name given to him in 1889 literally translates as "three-horned muzzle." Indeed, you cannot confuse with any other dinosaur.

However, some dinosaur names have rather strange meanings. Despite the fact that the allosaurus (Allosaurus) was the dominant predator and even the hero of many films, its name translates simply as "another lizard." Probably, according to the first sample found to the paleontologists who studied it, it became clear that this animal is different from those found previously.

Some dinosaur skeletons, by the way, can also receive proper names in addition to species. The Field Museum of Natural History (Chicago) is home to Sue (Tuex) and the Triceratops Hatcher (National Museum of Natural History (Washington)). In general, the same nomenclature rules are used in the systematics of dinosaurs as in other animals. First comes the name of the genus - for example, Brontosaurus, and after it - the name of the species: excelsus. From time to time, paleontologists find new species belonging to an already known genus. For example, Velociraptor mongoliensis was found back in 1924, and in 2008 another species of the same genus, Velociraptor osmolskae, was described.

For many paleontologists, choosing the name of an ancient animal is a very serious matter. “Choosing a name for a new species of dinosaur has always been a difficult task for me,” says Lindsay Zanno, a paleontologist at the North Carolina Museum of Natural Sciences. After all, these names play a large role not only for communication between researchers. Dinosaurs have their own, and quite significant, niche in pop culture, and an interesting, vivid name is a great way to interest the audience. “A well-chosen name will arouse interest, revive extinct species in the collective imagination,” adds Dr. Zanno.

But in the most serious case, sometimes there is a place of stupidity. A long-necked dinosaur with muscular legs was called Brontomerus, which literally translates as "rattling thighs." This name was invented by Mike Taylor and colleagues in 2011. And in 2012, another paleontologist Michael - Ryan (Michael Ryan) - a paleontologist at the Cleveland Museum of Natural History, examined with his colleagues a sample that was believed to belong to a representative of centrosaurs (Centrosaurus ), that is, "spiked lizards." Scientists have found that in fact the sample belongs to another species, which was called the coronosaurus (Coronosaurus) - or the "lizard with the crown."

But, Ryan recalls, his fellow paleontologist Jim Gardner called him Broccoliceratops for the duration of the study because of the protuberant ridges on the crest. “I'm sure Jim suggested the name just for fun,” recalls Ryan. “But it's very expressive.”

However, sometimes such working nicknames given to an undescribed dinosaur stick to him forever. This happened with the Wendiceratops, described there by Ryan and David Evans in 2015. The pangolin received this nickname in honor of its discoverer Wendy Sloboda, and then it became the official scientific name of the animal.

Often dinosaurs are named after peoples or tribes, in the places of residence of which the find was made. In the 1980s, the bones of duckbill dinosaurs found in the Colville River region of Alaska were identified as the remains of Edmontosaurus, a widespread and well-studied Cretaceous herbivore. But last year, paleontologist Hirotsugu Mori (Hirotsugu Mori) and colleagues found that these bones belong to another, not previously described species, which they called Ugrunaaluk kuukpikensis. This name, translated from Inuit, Inupiak means "an ancient animal grazing on the Colville River."

The co-author of the study, Patrick Druckenmiller, proposed this name. "He believed that the indigenous peoples of Alaska knew that the bones belong to the herbivorous reptile before they were found by scientists," said Mori.

The appeal to human culture, and in particular to mythology in general, is very popular among paleontologists, says Zanno: “This is a way to connect science and imagination - two sides of the same coin, although we often don’t realize it.” As an example, Zanno cites a large oviraptorosaurus resembling a flightless parrot.

"It was clear that the name should emphasize its huge size, but in addition, I would like to transfer the audience to bygone days, when our planet was a completely different, almost unimaginable world," the paleontologist explained. And he chose the name Hagryphus giganteus for the new animal, in which "the name of the Egyptian god Ha of the western desert Ha and the name of the mythical beast of the griffin were combined." The species name in this case indicates a large size of animals. “This is now my favorite combination,” Zanno added.

There is no doubt that over time, science will be enriched by even more names - after all, paleontologists are constantly finding new dinosaurs. In fact, we now live in the golden age of paleontological discoveries: a new species of dinosaurs is described on average every two weeks. And estimates of the number of fossils not yet found say that we discovered and described only a small fraction of all types of dinosaurs.

Gradually, the methods of inventing names for new species of dinosaurs change. “My generation is probably the first to not have to learn Greek and Latin while studying,” says Ryan. “Over time, ignorance of these languages \u200b\u200bis growing and scientists are moving further away from previous taxonomic traditions.”

All this, coupled with the fact that researchers are also influenced by pop culture, has led to a noticeable change in the names of dinosaurs. In 2001, the wry-toothed "vicious lizard" Masiakasaurus knopfleri received a specific name in honor of Dire Straits guitarist Mark Knopfler - because it was to the music of this group that the remains of a dinosaur were discovered.

Nevertheless, the anatomical traits traditionally noted in the names, locations, as well as the names of the authors of the find still play an important role in naming new species - both dinosaurs and other animals. "Researchers emphasize morphological features in the name of the genus, while the name of the species can be given in honor of some geographical object or person. But if you discovered a new species of beetles with a Superman sign on their abdomen, it’s hard to resist giving its obvious name, "Ryan summed up.

Based on materials from Smitrsonian.com

Dinosaurs are a group of lizards, or reptiles, that flourished in the Mesozoic era - an era of middle life on our planet. Other reptile species lived on Earth with them - crocodile-like, flying lizards, plane-toothed and serpentine, fish-like and scaly species of lizards. The differences between the dinosaurs were so great that scientists establish their family ties with great difficulty. Dinosaurs were the size of a cat or chicken, and were the size of whales. Some moved on four legs, others ran on two. Among them were bloodthirsty killers and predators, dexterous hunters, as well as herbivorous and harmless species.

Dinosaur species

But there is one feature that unites them, they were all terrestrial animals, their paws were located at the bottom of the hull, and not on its sides like most of the current lizards. Therefore, dinosaurs can still be called running reptiles. What were the dinosaurs, is currently not known exactly. Archaeological excavations are still underway, according to the results of which, every year new and new species of dinosaurs are discovered. Over the 150 years of work of paleontologists, with the help of the remains and skeletons, about 500 species of these animals have been discovered. But in fact, more than 10,000 remains have been found. And this indicates that there could have been over 4,000 species of dinosaurs living in different eras of the Jurassic and Cretaceous periods.

If you look at the comparative characteristics of what dinosaurs used to be, you can see the trend of their great diversity and prevalence around the globe. Dinosaurs flew, swam, crawled, they were of various sizes and bizarre shapes:

• Notosaurs and flutes looked like modern lizards with a crest, with a swimming tail flat on the sides.
• Crocodiles and mososaurs were elongated, and moved due to the twisting movements of the tail.
• Plesiosaurs, sea turtles, pliosaurs resembled a lizard with a crest, and hind limbs were used as fins.
• Fish-shaped lizards, which looked like dolphins, in their shape resembled fish, and moved in the water with the help of a tail.
• A distinctive feature of flying dinosaurs was the presence of their wings, covered with a leather membrane, like modern bats. And the fourth finger, from which the skin was stretched, was greatly lengthened.

The best

Well, now let's talk about the records. Are you curious to know which is the largest dinosaur, and which is the smallest, which are predatory, and which are herbivores? Records among dinosaurs will be considered below:

• The smallest dinosaur is a cosmognatus, whose length was about 70 cm and weight was about 3 kg.
• The highest dinosaur is the brachiosaurus, whose length reached 23 meters, and the weight was 30-40 tons.
• The longest dinosaur is a diplodocus, the length of which could reach 52 meters.
• The most toothy dinosaur is ornithomimid, which had about 220 sharp teeth.
• The smartest dinosaur is supposedly a troodontid, which, by the ratio of the size of the body to other dinosaurs, had the largest brain.
• The largest and heaviest dinosaur, apparently, was a titanosaurus, which lived in the Antarctic and weighed, according to some estimates, about 100 tons.

The most common types

Well, our last question regarding which species of dinosaurs were the most common, and to this day they find the largest number of their remains. These are triceratops, tyrannosaurus, pterodactyl, diplodocus.

• Triceratops is a horned, herbivorous dinosaur that lived on Earth in the Cretaceous, about 70 million years ago. On his head were three large horns, for which he received the name. He weighed about 12 tons, and was about 9 meters in length.
• Tyrannosaurus - sometimes the most famous lizard nowadays. The largest predator, whose weight reached 4 tons and a height of about 6 meters. All tyrannosaurs had powerful heads and jaws, and the length of the teeth could reach 15 centimeters!
• Pterodactyl - inhabited the Earth about 150 - 70 million years ago. The flying lizard, with a long mouth dotted with sharp teeth, mainly fed on fish and small creatures. The wingspan could reach 16 meters.
• Diplodocus is a herbivorous dinosaur that inhabited about 150 million years ago. Paleontologists found the remains of these giants in the best preserved form and therefore, almost their entire skeletons are found in museums. It is believed that this may be the longest land dinosaur, according to scientists, its length could reach 52 meters.

Dinosaurs, which is translated from Greek means - terrible (terrible) lizards (lizards), are a superorder of aboveground vertebrates that existed and led an active lifestyle throughout the Mesozoic era. Dinosaurs are considered to be the first vertebrate animals that settled throughout the planet, while their ancestors, amphibians, were forced to live only near water bodies, to which they were attached due to the nature of reproduction. The finds of the first representatives of the dinosaurs are dated 225 million liters BC. e. Over the history of its existence, which lasted for 160 million years, this superorder has expanded extremely, giving a huge number of varieties. Scientists suggest that the number of genera of dinosaurs at the peak of their prosperity could reach 3400, although so far, as of 2006, only 500 of them were confidently described. Each genus had an indefinite number of species. In 2008, 1047 species of these ancient vertebrates were described. And at the moment, as a result of new archaeological discoveries, this number is increasing.

On the border of the Mesozoic and Cenozoic, there was a kind of global shock that served the mass extinction of dinosaursafter which only miserable units remained from the reptiles dominating throughout the Mesozoic.

Pelvic bone dinosaur classification

There are many ways to classify dinosaurs. In connection with the specifics of their works and literary works, it is convenient for someone to sort the ancient vertebrates of the Cretaceous period by size, someone according to their habitat, since at that time there were water reptiles, and land and aeronautics. Someone prefers to divide the dinosaurs into bipeds and tetrapods. But the main generally accepted form of classification is dinosaur classification  according to the method of the pelvic bones, proposed back in 1887 by the famous English paleontologist G. Seeley.

Fig. 1 - Classification of dinosaurs

Despite the fact that the group of ancient reptiles is considered the ancestors of all dinosaurs without exception archosaursAt the beginning of the Triassic, their development went in different ways. It is from this time that happened separation of reptiles according to the principle of the structure of the pelvis  on the:

• lizotropic;
• poultry.

But this does not mean at all that it was from the lizards that all lizards evolved, and from the poultry-lazy birds — the birds. These are conditional names, associated only with the fact that in the lizards of the pelvic lobes, the pubic bones of the pelvis were primarily directed forward, in the manner of the current crocodiles, while in the poultry ones, back, in the bird's manner.

In appearance, it would be difficult to determine which group a particular dinosaur belongs to. Much more clearly, these groups differ in the structure of the jaws. Lizards possessed jaws, the rows of teeth which were located strictly along the edges in one row, reaching the tip of the muzzle. All teeth had a conical or chisel shape and were each located in its own separate cell. Ptitsetazovye had lower jaws ending in the anterior part of the predental bone. Often had no teeth in the front and upper jaw. Often, the front of the poultry-gaz dinosaurs simply looked like a massive horned tortoise beak.

Lizard-dinosaur dinosaurs

Lizard-dinosaur dinosaurs  (Fig. 2) were divided into:

• Theropodov  - appeared on the borders of the Cretaceous and Jurassic and are the largest representatives of carnivorous carnivorous reptiles that existed until the end of the Cretaceous period and the global cataclysm that caused the mass extinction of species.
• Sauropodomorphs  - also originating in the late Triassic, some of which were the most gigantic creatures in the entire history of the Earth. All of them were herbivorous and were subdivided, in turn, into two further subgroups, namely, the prosauropods living in the Late Triassic - the early Jurassic and replaced by later and developed sauropods closer to the middle of the Jurassic.

Fig. 2 - Lizard dinosaur

Theropods were mainly two-legged predators, but omnivores, for example, such as therizinosaurus or ornithomimid, came across among them. Some of the theropods, such as the spinosaurus, reached 15 meters in height. These predatory representatives of the lizards have three advantages over other dinosaurs, consisting in:

• extreme agility and speed of movement;
• unusually developed vision;
• freedom of the front paws, because they ran on two unusually developed hind legs, and thereby could freely perform any other functions of the front ones.

Giant growth often had detrimental effects on theropods. For example, a tyrannosaurus, catching up with its prey, had to be very careful when running, because with its impressive dimensions (one hind limb reached 4 meters height), any wrong step, any bump or uneven ground could cause a fall, which often led to tangible, and sometimes fatal injuries. In its turn, theropods are classified  on the:

• coelurosaurs, small and nimble bird-like lizards, such as ornithomimes and velociraptors;
• carnosaurs, large predators, examples of which were the aforementioned tyrannosaurus and allosaurus.

The sauropodomorphs were the owners of the sacral brain, which exceeded the head in size by 20 times. Despite their huge weight and size, they became frequent victims of predatory dinosaurs. The sheer size of these ancient reptiles was a consequence of the build-up of intestinal mass necessary for the digestion of hard-leaved plants. As a result, along with the stomach, the rest of the body was forced to increase in size. Examples of such lizards were camarosaurs, giraffatitans, brachiosaurus, etc.

Let's take a closer look at the theropods using the example of one of the most numerous predators of that Middle Jurassic - allosaurus  (fig. 3). On average, these predators reached a 3.5-meter height at the withers and 8.5-meter length from muzzle to tail. Their habitat was the North American, South European and East African parts of the ancient mainland Pangea.

Fig. 3 - Allosaurus

Allosaurus had a fairly large skull, their jaws were equipped with a huge number of sharp teeth. In order to balance the body when moving as opposed to a massive head, there was an equally massive tail, with which the animal often knocked its victims down. For the same, a massive head often served. Compared to other large terraces, allosaurus were relatively small, but this gave them more maneuverability and mobility. There is also evidence that large dinosaurs such as some representatives of sauropods, such as brontosaurs and thyroids, such as the stegosaurus, they hunted in the herd method, like the current wolves. Although many scientists are skeptical that these animals could coexist in packs. In their opinion, for this they had too primitive mental development and extremely strong ferocity and aggressiveness.

Poultry Dinosaurs

Despite their name, the scientists proved that it was not they, namely the lizards and dinosaurs, who later became avian ancestors. But, returning precisely to poultry dinosaurs  (Fig. 4), note that they classified  into two main suborders, namely:

• thyrophors;
• therapies.

Fig. 4 - Poultry Dinosaur

TO thyreophore  include herbivorous dinosaurs such as ankylosaurs and stegosaurs. A distinctive feature of these lizards was that their body was partially covered with shell armor, and on the back there were huge shield-shaped growths.

To discharge therapists includes marginocephals, such as ceratops and pachycelosaurs and all ornithopods, of which the most widespread representative was iguanodon  (fig. 5).

The iguanodons had their peak in the first half of the Cretaceous, and populated the vast expanses of the European, North American, Asian and African parts of Pangea. The 12-meter and 5-ton iguanodons moved on two massive hind legs, in front of the muzzle they had a massive beak, with which they plucked the plants they needed. Next came the rows of teeth, more similar to the teeth of iguanas, only of much larger sizes.

Fig. 5 - Iguanodon

The forelimbs of iguanodons were a quarter of the size shorter than the hind legs. Thumbs were equipped with spikes, with the help of which the animal defended itself from predators. The most mobile of the fingers of the forelimbs were the little fingers. It should be noted that iguanodons could not run, their hind limbs were adapted only for leisurely walking, because of which they often became victims of predators such as allosaurs, tyrannosaurs, etc. The hind limbs had three fingers, similar to current chickens, and their spine and massive tail were supported by strong tendons.

The problems of classification of dinosaurs in our time

Many scientists insist that a large number of dinosaurs already described did not exist before, because some of the described species were nothing more than doubles of the species already described earlier. The difference between them was supposedly only in that they were either at an earlier or a later stage of development. Also, a fairly large group of scientists insists that about 50% of all dinosaurs found were classified and named incorrectly.

Thus, the current paleontologists were divided into two camps. While some continue to further divide the bulk of the found remains of ancient reptiles into ever new species based on the revealed significant and not very distinctive features, others completely doubt the correctness of the species described earlier.