Thursday, November 28, 2019

DINOSAURS!: From Cultural to Pop Culture - 1825: Iguanodon

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1825: Iguanodon

Despite some question about the event, it is generally believed that in 1822 Mary Ann Mantell stumbled upon a tooth unlike anything she had ever seen before. She presented the tooth to her husband, Gideon, a physician who had an interest in fossils. Based on the location of discovery, Gideon was able to trace the tooth back to its source and discovered several other teeth as well as some other bones. Although Dr. Mantell was unable to link the other bones with the teeth, he still had these highly unusual teeth to interpret.

Dr. Mantell ended up sending the teeth to renowned scientist Baron Georges Cuvier. Although Cuvier was initially skeptical of the teeth and said they were part of a rhinoceros, he later recanted. In a letter that Gideon reprinted in his announcement of Iguanodon, Cuvier expresses his opinion, that based on the structure of the teeth, they were from a very large, unknown, herbivorous reptile. Cuvier recommended finding more material though, of which Mantell was unable to do.

The teeth were found in the sandstone of the Tilgate forest, of which crocodile, plesiosaur, and Megalosaurus, material was already identified within the rock unit. These teeth, and some other bones, were the only pieces they weren't able to identify. Even though he didn't have much material to go on, Dr. Mantell would not be dissuaded and upon visiting the Royal College of Surgeons in London he was shown a specimen of an iguana, brought back from the West Indies by Darwin. Looking at the teeth, Dr. Mantell noticed the extreme similarity between the two, except his was much, much larger. He eventually published on the specimen in 1825 in a journal article entitled "Notice on the Iguanodon, a newly discovered fossil reptile, from the sandstone of Tilgate Forest, in Sussex".
"If however any inference may be drawn from the nature of the fossils with which its remains associated, we may conclude, that if amphibious, it was not of marine origin, but inhabited rivers or fresh-water lakes; in either case the term Iguanodon, derived from the form of the teeth, ... will not, it is presumed, be deemed objectionable."

The original illustration of the Iguanodon material from Mantell's 1825 paper, Notice on the Iguanodon...
The naming of Iguanodon made this the second dinosaur ever to be officially named, however it is still over a decade before the term “Dinosaurs” will be coined. Like the Megalosaurus paper the previous year, it was also assumed that these large saurians were aquatic, or at least amphibious. mostly based on their association with known aquatic species like plesiosaurs and sharks. Also, along with the Megalosaurus, no reconstructions were even attempted at the time. The only real description of the animal itself was a ballpark estimate on its size:
"That the latter equalled, if not exceeded the former in magnitude [Megalosaurus], seems highly probable; for if the recent and fossil animal bore the same relative proportions, the tooth, fig. 1. must have belonged an individual upwards of sixty feet long; a conclusion in perfect accordance with thatdeduced by Professor Buckland from a femur, and other bones in my possession."
The initial reconstruction for Iguanodon must also wait, like with Megalosaurus, another decade for a more complete specimen to be found. It is at that time that Mantell will return to the Iguanodon in order to create a what will become one of the first dinosaur reconstructions.

References
http://www.dinohunters.com/Iguanodon/
Mantell, G.A., 1825, VIII. Notice on the Iguanodon, a newly discovered fossil reptile, from the sandstone of Tilgate, in Sussex: Philosophical Transactions of the Royal Society of London, v. 115, p. 179-186.

Tuesday, November 26, 2019

DINOSAURS!: From Cultural to Pop Culture - 1824: Megalosaurus

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1824: Megalosaurus

Starting in the early 1800's, people began to notice the fossils of extinct animals for what they were, extinct animals. Originally it was assumed that God would never let one of his creations ever go extinct, so these remains that were being discovered must be the remains of something not known in that region. However, as time passed people were realizing that the bones they were finding belonged to nothing that was alive today and therefore must be extinct. 

This trend of identifying unknown, extinct animals really kicked off in the 1820's with the discovery and naming of several aquatic animals like the Plesiosaurus (1821) and the Mosasaurus (1822). However, being aquatic animals there was always a possibility that they could still be around, just somewhere off in the deeps of the oceans. This changed as the first extinct land animals started to be identified. In 1824, William Buckland described and named the first known dinosaur species, however the term "Dinosaur" didn't exist yet. The bones, which were far from a complete skeleton, were discovered in Stonefield, England. Even though Buckland realized that he likely knew he had the bits and pieces of several individuals, he knew he had enough of the animal to determine that this is something the world had never seen before.

Buckland described and named his bits of bones in a paper entitled "Notice on the Megalosaurus or Great Fossil Lizard of Stonesfield". His description included images of the lower jaw from multiple angles, some teeth, some vertebrae still attached, or at least adjacent to each other when found, some ribs, pelvis pieces, scapula pieces, a femur, a fibula, and a metatarsal (some of the bones which were misidentified).

Most of the images of the Megalosaurus material from Buckland's 1824 paper
Buckland references several people who are, or will be, influential in paleontology in the coming years including Cuvier and Gideon Mantell. Mantell will later come out with descriptions of his own dinosaur the following year and it was this discovery which prompted Buckland to publish Megalosaurus as quickly as he could Based on the size of the bones presented, Cuvier would have estimated the animal to be 40 feet in length and weigh as much as an elephant seven feet high. Buckland seemed hesitant to place those exact dimensions on this animal but he did accede that it had to have been larger than any currently living animal. There was also another set of bones assumed to be from the same species that Buckland was describing which was significantly larger than his primary specimen. 
"...the beast in question would have equaled in height our largest elephants, and in length fallen but little short of the largest whales; but as the longitudinal growth of animals is not in so high a ratio, after making some deduction, we may calculate the length of this reptile from Cuckfield at from sixty to seventy feet. In consideration therefore of the enormous magnitude which this saurian attains, I have ventured, in concurrence with my friend and fellow-labourer, the Rev. W. Conybeare, to assign to it the name of Megalosaurus." 
Not knowing anything about the animal itself, Buckland also makes a rather interesting assumption about the ecology of Megalosaurus:
"The megalosaurus itself was probably an amphibious animal, and we might therefore expect (as is actually the case) to find it associated with the remains of other amphibia..."
The reference to Megalosaurus being amphibious was because it was discovered in the same deposit as crocodile, turtle, and plesiosaur remains. Buckland however does not attempt to provide a reconstruction of the animal, a common practice in today's scientific world. He describes the animal in both size, as listed above, and as quadrupedal, but doesn't really give any other description by which someone could recreate the giant beast. It wasn't until the 1850's when the world would see a recreation of Megalosaurus in the Crystal Palace exhibits by Benjamin Waterhouse. 

References

Monday, November 25, 2019

DINOSAURS: From Cultural to Pop Culture - 1696: Cornelius Meyer's Dragon

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1696
Cornelius Meyer's Dragon

Towards the end of the 1600's, Europe was still enmeshed is dragon fever, with dragons still commonly being thought of as real life animals. Nothing portrays that better than the case of Cornelius Meyer's dragon (or Cornelio Meyer as it is inscribed on the skeleton placard). The case of the dragon was excellently laid out in a 2013 publication by Phil Senter and Pondanesa D. Wilkins (Senter and Wilkins, 2013).  
Skeletal display of the dragon as presented by Meyer in his 1696 book.
In 1691, Cornelius Meyer "discovered" a dragon skeleton while excavating for a dike in the vicinity of Rome. The dragon had apparently plagued the landscape, being the blamed as the cause for much of the flooding that Rome was experiencing. The dragon was assumed to have been killed in 1660, however there was debate about the issue, and the dragon was re-assumed to be alive. The locals were skeptical of pissing off the dragon by constructing the dikes, so the dragon needed to be dealt with first. 

In order to allay the fears of the local populace, Cornelius Meyer went out to "take care of" the dragon, which he so conveniently produced the body of for public display. The image above is an illustration of the skeleton that was put on display with the caption "Drago come si ritrova nelle mani dell' Ingegniero Cornelio Meyer" (“Dragon as it was recovered in the hands of the engineer Cornelius Meyer”). 
Reconstruction of the dragon based on the associated skeleton from Meyer's 1696 book.
The image of the skeleton, as well as the reconstruction drawings were reproduced for a book authored by Meyer, Nuovi ritrovamenti Divisi in Due Parti (New Findings Divided in Two Parts), which was published in 1696. The book is mostly a description of dike construction projects in the vicinity of Rome with just a few brief images of the dragon and its reconstruction. Very little information is given in the text about the dragon itself.
Another reconstruction as presented by Meyer in his 1696 book.
This particular dragon was recently brought back into the public conscious as evidence that pterosaurs and humans once coexisted. To quell that idea, Senter and Wilkins went about to describe the specimen as it is presented by Meyer in the skeletal reconstruction. Based on comparative anatomy, they were able to deduce that the skeleton was indeed a hoax (assuming a real skeleton was ever actually presented as it is illustrated). From their scientific analysis they determined (pretty conclusively in my opinion) that the skull was that of a dog, the mandible a smaller dog, the hind limbs were of a juvenile bear's forelimbs, the ribs were from a large fish, and the tail, wings, and nose horn were all fake additions. The skeleton was also presented with "advantageous" skin coverings which hid the joints between the disparate parts. 

I find that the most interesting aspect of the dragon is the continuation of the medieval body plan of the dragon being dragged almost into modern day society. We still continue to see the prevalence of two hind limbs, leathery wings, an elongated fat leathery body, long tail, and a dog-like face. So much dog-like that the skull was determined to be an actual dog! The body itself also appears to be rather small, given that the skull was of a dog. I would estimate that the entire body would only likely be about 10 feet from snout to tail tip and a few feet high standing upright. In general, although they somehow reigned terror in the Middle Ages, they were only about the size of a large lion at the most. 

References

Saturday, November 23, 2019

DINOSAURS: From Cultural to Pop Culture - 1651: The Mexican Dragon

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1651
The Mexican Dragon


Dragon illustration from the Nova plantarum, animalium et mineralium Mexicanorum historia (1651) by Francisco Hernandez [Page 816].
In the 1570's, a Spanish physician named Francisco Hernandez was tasked to travel through Mexico and document the plants and animals for the region with the intent of publishing a tome with this information. His trip was funded and directed by King Phillip II, whom Hernandez was the physician for. King Phillip II was intent on expanding Spanish influence on scientific matters in the world by directing the first European scientific exploration of the "New World". Hernandez ended up traveling through Mexico for three years with the help of the local Aztecs, constantly cataloging plants and animal species. He eventually spent a small fortune but the trip was considered a success with a boat load of specimens brought back to Spain.

Unfortunately, by the time of Hernandez's death in 1587, the tome wasn't even close to being published. Still wanting to make a profit on this knowledge, King Phillip II tasked another court doctor to finish the publication. Eventually, this new doctor and King Phillip II both passed away without making much headway. Part of the issue was that Hernandez's notes were confusing and jumbled up, adding to the difficulty in organizing them, especially for anyone who wasn't on the trip in the first place. He also often used the local name for species of plants and animals, not knowing how they related to European plants and animals.

In 1603, some of his notes were eventually discovered by Federico Cesi, a member of a high-class Italian family. Being fascinated with the papers, Cesi spent a small fortune obtaining all of the scattered Hernandez papers that he could find. He then tasked himself and his friends, which included a young Galileo, to organizing and eventually publish this tome. Years went by and all of Cesi's friends who were working on the publication eventually passed away, except for one, Francesco Stelluti. Stelluti was finally able to bring the final document to publication in 1651, eighty years after Hernandez initially set out to the New World. The finalized work was entitled Nova plantarum, animalium et mineralium Mexicanorum historia (New Plants, Animals, and Minerals Mexican History).

With so many people touching this manuscript from the time of Hernandez's journey until final publication it is impossible to know which illustrations were original to the author and which were added later. The illustration itself also looks like it was pieced together from several different animals with the head and body of a snake, and the scaled wings unlike anything that I am aware of. I have seen people claim that this illustration, or others like it, is evidence of pterosaurs still in existence, however the body structure and wing plans are nothing like any pterosaur that I aware of. The body structure however does resemble previous dragon illustrations throughout the history of the middle ages in Europe. Specifically like the dragons from Topsell's The History of Four-footed Beasts and The History of Serpents. This strong similarity lends credence that this dragon is completely made up, probably by one of Cesi's crew of workers.

References
Hernandez, F., 1651, Dracunculus monoceros, Nova plantarum, animalium et mineralium Mexicanorum historia (A New Natural History of the Plants, Animals and Minerals of Mexico): Rome, p. 816-828.
https://www.atlasobscura.com/articles/francisco-hernandez-the-coolest-explorer-youve-never-heard-of
https://www.strangescience.net/stdino2.htm

Friday, November 22, 2019

DINOSAURS: From Cultural to Pop Culture - 1572: The Last Dragon Slaying

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1572
The Last Dragon Slaying in Europe

Most of the dragons that appeared in the middle ages (AKA the Medieval Times) were fanciful beasts, often feathered, with wings and perhaps a couple of front legs. But they were clearly in the realms of people's imaginations brought about into life by some variety of artisan. This current "dragon" is a bit different, to the point that it is very debatable whether this could even be considered a "dragon" by the loosest stretch of the definition. 

Drawing of the "dragon" in question by Ulisse Aldrovandi in the The Natural History of Snakes and Dragons (page 404), published posthumously in 1640. 
It started in 1572 when a herdsman named Baptista of Camaldulus came across this beast that, as far as he knew, resembled a dragon near the town of Bologna. 
"...the herdsman noticed a hissing sound and was startled to see this strange little dragon ahead of him. Trembling he struck it on the head with his rod and killed it."
Normally this would be written off as nutery, however the person who described the remains of this "dragon" was Ulisse Aldrovandi, a naturalist of some influence who had written many essays on the subject and had slowly built up a museum termed the Theatre of Natural Science in Bologna. Aldrovandi described the beast as reptilian that slithered along like a snake, however it used it's front limbs to help propel itself forward. 

Compared with contemporary dragon illustrations there appears many similarities, however this dragon is notable for its lack of wings. Nearly every example of European dragons (at the time) were two legged, winged, reptilian beasts. And although Aldrovandi's illustration hits most of the salient parts, its lack of wings is noticeable. It may be assumed that Aldrovandi was a quack, or just wrote hearsay articles about dragons without any definite proof, so why put any stock in this image. However, he specifically states in his book where this dragon appears, The Natural History of Snakes and Dragons, that all of his dragons are presented as third-hand knowledge and he has had no direct knowledge of any dragons ... except this one. Why single out this one individual?

For example, here is another dragon illustration from the book, which is specifically of a dragon, not a personally described specimen. This dragon follows the body plan that was more or less laid out at the time.

Another dragon illustrated by Ulisse Aldrovandi in the The Natural History of Snakes and Dragons (1640). Image from StrangeScience.net

As a scientist myself, I wonder if this is some exaggerated specimen of a snake that just ate a large meal, or perhaps a mutated snake with vestigial limbs. Being a naturalist I would assume that Aldrovandi would be able to identify a well fed snake versus a legitimately "fat" snake. This specimen was also apparently kept in his collection at the Theatre of Natural History for a long period of time until it was eventually lost (conveniently), likely sometime in the 1700's or 1800's. Perhaps it was all a hoax at our expense, the world may never know.

Although this would more than likely be classified as an oddity of biology and not a legitimate "dragon" (if it were indeed true), it was often referred to as the "last dragon" of Europe. And Aldrovandi himself referred to the animal as Draco Bononiensis (Bologna Dragon). So I place this here in our history of dragons as cultural influencers, as perhaps this species of animal, whatever it may be, may be our actual link to a dragon source.

References