How Well Do You Know Prehistoric Discoveries?

Lyrarapax unguispinus was unearthed in 2013 near Kunming in the Chinese province of Yunnan. The Cambrian period is known as the time when complex life forms first emerged on Earth, around 541 million years ago. This period is characterized by the rapid diversification of marine life, with the appearance of various animal phyla. Therefore, it is logical to conclude that Lyrarapax unguispinus, being a complex life form, lived during the Cambrian period.

Pelagornis sandersi is the correct answer because it is known to be the largest flying bird in history. This prehistoric bird lived around 25 million years ago and had an estimated wingspan of up to 24 feet, making it larger than any other known flying bird. Its fossil remains have been found in North America, and its size is believed to have allowed it to soar over the open ocean for long distances.

Diplodocus is one of the hip-jointed dinosaurs. This dinosaur belonged to the group of sauropods, which were characterized by their long necks and tails. Diplodocus had a unique hip structure that allowed it to walk on both land and water. It lived during the Late Jurassic period and was one of the largest dinosaurs, reaching lengths of up to 90 feet. Diplodocus is well-known for its long and slender body, making it a popular dinosaur among paleontologists and dinosaur enthusiasts.

Changyuraptor Yangi, whose fossil was discovered in northeastern China, lived in the Cretaceous period. This is because the Liaoning Province is known for its rich deposits of fossils from this time period, which lasted from about 145 to 66 million years ago. The Cretaceous period was characterized by the dominance of dinosaurs, including the famous Tyrannosaurus rex and Triceratops. Changyuraptor Yangi, as a dinosaur, would have lived during this time and would have been part of the diverse ecosystem that existed during the Cretaceous period.

The correct answer is Megamastax amblyodus because research has shown that it is the largest known vertebrate fish in the Silurian fossil record. The other options listed are not supported by any evidence or research regarding their size or existence during the Silurian period.

The correct answer is Arizona because the first prehistoric camel was discovered in North America, specifically in the state of Arizona. This discovery provides evidence of the existence of camels in this region during prehistoric times.

In 2014, researchers in Brazil discovered 47 specimens of the pterosaur Caiuajara dobruskii.

Kulindadromeus zabaikalicus is the correct answer because it is the only option that is a valid scientific name. The other options do not follow the proper naming conventions for species. Additionally, Kulindadromeus zabaikalicus is a known plant-eating dinosaur that lived during the Jurassic era, which aligns with the information provided in the question.

The Silurian period is the correct answer because it is the geological time period when plants began colonizing land. This period, which occurred between 443 and 419 million years ago, saw the emergence of various plant groups that adapted to terrestrial environments. During the Silurian period, plants evolved structures such as roots, stems, and leaves, allowing them to thrive outside of water. This period was crucial in the development of land ecosystems and paved the way for the diversification of plant life on Earth.

Dormaalocyon is considered the most primitive known member of the prehistoric carnivoraforms group. This is because it is one of the earliest known carnivorous mammals and exhibits many primitive characteristics, such as a more generalized dentition and limb structure. It lived during the Paleocene epoch, which was a time of significant diversification and evolution of mammalian groups. Therefore, Dormaalocyon represents an early stage in the evolution of carnivoraforms and provides important insights into the origins of this group.