Q: What was the biggest of all the swimmers ? -Optimas
A: This question was actually answered back in October, but thought it would be a great refresher. The first point I’d like to make is that the main “swimmers” of the Mesozoic were called plesiosaurs (they were not dinosaurs). They were big, flippered sea reptiles like Liopleurodon. Although, to be sure, the Mesozoic had a rich abundance of sea life! These guys were just the biggest ones.
The Mesozoic was populated with a whole host of incredible sea reptiles that terrorized everything else in the sea. We’ve talked about Liopleurodon before, who was the largest of them all but the longest is actually Mauisaurus.
Like Liopleurodon, Mauisaurus was a plesiosaur. Mauisaurus measured out to be a whopping 65ft (20m) in length and was the longest sea reptile of them all. Found only in New Zealand fossil beds, Mauisaurus must have been a fearsome predator during its day. They’ve even found a fossil of one fighting a mosasaur!
Hope you enjoy this Dino Fact!
Q: What was the largest amphibian during the time of the dinosaurs? -Muclser
A: We all know the Mesozoic was the time of the dinosaurs. But we’ve also learned about the flyers, the swimmers, the bugs and the mammals. One group we haven’t talked about is the amphibians! You know these creatures today… frogs, salamanders, geckos and much more. As with many modern day creatures that existed in the past, the Mesozoic versions of amphibians were huge creatures!! The most common type of Mesozoic were the Temnospondyli, which were prevalent in the Triassic and few survived through the Cretaceous.
Koolasuchus, pictured above, was one of the biggest Temnospondyli. This dude grew to be about 16 feet (about 5m) long! The picture above doesn’t do it justice.
You may not know this, but there was a large extinction event between the Triassic and Jurassic periods (want to know more? ask me in the comments) and it killed off most of the large Temnospondyli. The remaining ones through the rest of the Mesozoic were mostly small, except for our super awesome friend Koolasuchus – who lasted through the Early Cretaceous.
Hope you dino’s enjoyed this Dino Fact!
Q: Who is the first ceratopsian that first appear? Irvine
A: Good question Irvine! As you know, ceratopsians only lived during the Cretaceous perod. Still, their history is a little fuzzy because of an incomplete fossil record. Ceratopsians are very well known for being the most “all-american” dinosaur. That is, the vast majority of their fossils come from North America, and a few in Asia.
As far as paleontologists can tell, the earliest known ceratopsian dinosaur is Psittacosaurus. Unlike other ceratopsians, these guys were bi-pedal (walked on two feet) dinosaurs and were about the size of a gazelle. Psittacosaurus is a genus of dinosaur, and known for having the most species of dinosaurs than any other genus even though it is not as famous as the Triceratops. They first showed up on the earth during the Early Cretaceous around 130-100 million years ago.
Their sharp beak is perhaps the most significant characteristic it shares with other ceratopsians. The rest of it doesn’t look too similar to a Triceratops though!
Hope you enjoyed this Dino Fact!
Q: How long were plesiosaur necks? -Horntrio
A: Good question! Keep in mind that there were many many different kinds of plesiosaurs that ranged from 13ft (4m) to the biggest, the pliosaurs, at 50ft (15m). While we think of plesiosaurs as having long necks, they varied quite a bit. One of the more famous plesiosaurs (a pliosaur) was liopleurodon. He was absolutely giant but had a short little neck that kind of looked like an alligator.
One of the longest plesiosaurs was elasmosaurus, who probably had the biggest neck of them all. Elasmosaurus’ neck was half the length of his body, meaning it was around 23 ft (7m) long! Not quite the same as sauropods, with mamenchisaurus having a neck twice that length but man, thats a really long neck!!
The holotype of Utahraptor is fragmentary, consisting of skull fragments, a tibia, claws and some caudal (tail) vertebra. The few elements suggest an animal about twice the size of Deinonychus. Like other dromaeosaurids, Utahraptor had a huge curved claw on the second toe; one is preserved at 22 centimetres (8.7 in) in length and is thought to reach 24 centimetres (9.4 in) restored. Estimated up to 7 m (23 ft) long and somewhat less than 500 kg (1,100 lb) in weight, Utahraptor would have been a formidable predator.
It is thought that Utahraptor may be closely related to the much smaller Dromaeosaurus and the giant Mongolian dromaeosaurid Achillobator.
Gallimimus was rather ostrich-like, with a small head, large eyes, a long neck, short arms, long legs, and a long tail. A diagnostic character of Gallimimus is a distinctly short ‘hand’ relative to the humerus length, when compared to other ornithomimids. The tail was used as a counter-balance. The eyes were located on the sides of its head, meaning that it did not possess binocular vision. Like most modern birds, it had hollow bones. Gallimimus had a number of adaptations which suggest good running ability, such as long limbs, a long tibia and metatarsus and short toes, but it is unknown how fast it could run.
A fossilized beak is present in one Gallimimus skull and ridges on the beak have been interpreted as part of a duck-like filter-feeding mechanism. However, similar ridges are seen in herbivorous sea turtles and ornithomimids were relatively common in seasonally dry environments, where filter-feeding was probably not a viable lifestyle. It seems more probable that Gallimimus was an omnivore, using its beak to crop plants and capture small animals.
Hope you enjoyed it!
Sorry, but i just now noticed Rex’d dino fact post 😀 So, here it is!
Q: Archaeoceratops is a dinosaurs that looks like protoceratops and gallimimus mix body, why? -Irvine
A: That’s a very interesting question Irvine. Archaeoceratops and protoceratops were both ceratopsians but belonged to different families. Also, they existed during different times of the Cretaceous. Still, the fact they belonged to the same Infraorder means they would havehomologous traits.
Homologous means they come from the same ancestor. These traits are very important in determining taxonomy of a creature. Frills on two different ceratopsians would be considered homologous because they were derived from the same ancestor, even if they looked slightly different.
On the other hand, Archaeoceratops may have had similar features to Gallimimus (standing upright, I assume?). These creatures were not related though, and the traits look the same (and may have the same function) but don’t come from a direct evolutionary line. These are called analogous traits.
Example of an analogous feature – a bird wing and a bat wing both serve the same purpose, and look similar, but they do not come from the same evolutionary line. Their wings are considered analogous.
Can you think of two animals who have analogous traits? Homologous traits?
Hope you liked it 😀
What’s bluggin’ guy’s? Well i have an awesome dino fact for you! Check it out:
Apatosaurus, including the popular but obsolete synonym Brontosaurus, is a genus of sauropod dinosaur that lived about 150 million years ago, during the Jurassic Period (Kimmeridgian and Tithonian ages). It was one of the largest land animals that ever existed, with an average length of 23 m (75 ft) and a mass of at least 23 metric tons (25 short tons). The composite term Apatosaurus comes from the Greek word.
The cervical vertebrae were less elongated and more heavily constructed than those of Diplodocus and the bones of the leg were much stockier (despite being longer), implying a more robust animal. The tail was held above the ground during normal locomotion. Like most sauropods, Apatosaurus had only a single large claw on each forelimb, with the first three toes on the hind limb possessing claws.
Hope you guy’s enjoyed it!
What’s the good word guy’s?! Well this is another dino fact posted by rex! Enjoy! I am starting to make a tag for Rex on his dino facts and my dino facts because he inspired me to do these.
Q: What did the Ceratopsian Einiosaurus use its bizzare looking horns for? – Einiosaurus
A: Great question Regisaurus! Before we get into the horns lets talk about little Einiosaurus here. I call him a little guy but he was a medium-sized Ceratopsian who grew to be about 20 ft (6m) long (Compare to Triceratops who grew up to 30 ft – 9m long). Still.. the funny proportions of his body make him look like a screwed-up Triceratops mini-me. Einiosaurus lived in the Late Cretaceous and fossils have been found almost exclusively in modern day Montana.
As for his horns… who really knows? Ceratopsians were all over the place. So many different species of random frills and horns and armor. Paleontologists are all over the place about what these could have actually been used for. Some say that maybe they weren’t even used for defense! Triceratops could easily have ripped in a hole into a large predator, but other ceratopsians have such strange horns that they couldn’t have been used to deal damage.
Others say they could have been used as a mating device, or a way to determine dominance in the herds. What do you think they were used for?
lol, funny triceratops or uh ceratopsians 😀
Hey Dino’s! Sorry i havent posted in a while been busy with a few school things. So here another dino fact for you guy’s! Enjoy!
Q: How big were the spikes on Isisaurus’s back? -Pakospinos
A: Well.. this is kind of a disappointing answer. As much as the thought of a spiked sauropod sounds AWESOME (does anyone know of another one?), there really isn’t much evidence to support the idea that these guys had them to begin with. Isisaurus belongs to the Titanosauridae family, a sort of “trash bin” family of dinosaurs for sauropods whose skeletons are not complete. With only a few bones collected from them, the only thing that paleontologists can really say is that it had a short, horizontal neck and long forelimbs.
The sad truth is that many dinosaurs species that have been identified do not come from full skeletons. It is extremely rare that a full dinosaur skeleton is found. Often a dinosaur or ancient animal is described from only one bone, or in the case of Megalodon – only teeth. The preserved example used to identify a dinosaur is called a holotype.
Looking for some more great dinosaur questions like these, or anything about ancient history! Have you read the post about ancient earth history yet? Might get some good questions from that…. Looking forward to answering more!
I really liked this fact a lot! Hope you did to!