The whale lived 33 million years ago today was part of the Pacific Ocean at the Burke Museum of Natural History and Culture in Seattle.
And Elizabeth Nesbitt's whale is not your typical cetacean. A study of fossil published on the ninth day of Nuclear Biology suggests Maiabalaena had a mouth and other species, called the Whale, a mechanism known as Whales.
"For the first time, we announce the origin of the filter feed, which is one of the most important innovations in the history of whale," said the co-author of Nicholas Pyenson, National History Museum, mammalian mammalian curator and Burke Museum affiliate commissioner.
Fossil M. nesbittae was discovered in the 1970s and has since been very learned. But the matrix and material matrix of fossil fuels hided many features, a formidable formal classification. Afterwards, Carlos Mauricio Peredo, a National Natural History Museum researcher, underwent a deep cleansing of fossils and explored the latest X-ray scanning technology.
The close look at the studies showed that the jawbone of M. nesbittae did not have teeth. That's not surprising. Whale, with a length of 15 feet long, some species of whale that lived in a while made an evolutionary transition instead of whites with teeth.
The whales are frugible and hairlike, such as underwater species and blue whale, using prey giant water gulps. This nutrition technique allows Whale Whale to consume a ton of food a day without any pain or bite.
M. nesbittae is specific, because its upper thighs are fine and narrow, it seems impossible to maintain whale structure.
"The whale whale's life has a huge and wide roof in its mouth, and it is also thickening to make whales' ring bands," said Peredo, the current author of Biology studies. "It's not a wicker. However, we can say that this fossil species did not say the teeth, but it might not be whales either."
This led to the hypothesis that some specific whale balloons were used to take advantage of the nutrition strategy they did not need tooth or whale.
Peredo and his colleagues say that muscle strains of M. nesbittae have strong cheeks and painful retracts. The whale was able to absorb large amounts of water, in the mouth, small fish and squid in the process … without teeth. (The current narwhal, which only has two teeth, uses a similar strategy).
In this scene, the loss of the teeth set a stage in the filtering and feeding structures of whales millions of years later. The main factor behind the inequality between food strategies was the dramatic cooling in the ocean waters, from Eizene to the Oligocene transition period, about 34 million years ago.
The apparent state of M. nesbittae as a transitional species Peredo and his colleagues are described as a formal description of the fossils in the genus's name.
"The name is Maiabalaena, meaning" Maia "," mother "and meaning" whale ", meaning whale," Peredo said. "It is located next to the base of the tree of its whale's whale."
Peredok said the name of the species, nesbittae, Nesbitt warned that "the Western Northwest paleontology was making a contribution to the Museum of the burial ground."
Nesbitt studies fossils throughout western North America, paying special attention to sea fossil fuels. Currently, he studies the current microbial Puget Sound, and small creatures known as foraminifera are the main indicators of Puget Sound's health. (Spoiler alert: Indicators are not looking good).
In addition to his research, Nesbitt has a public importance as a paleontological vertebrate and micropaleontology journalist at the Burke Museum. According to the museum, the exhibition includes themes from the seismic history of the Pacific Northwest, imaginative representations of ancient fossils in captivity.
Peredok is partly aware of Nesbitt's work, because his research has made extensive use of fossil-state states of Washington and Washington, including fossils bearing his name.
In addition to Peredo and Pyenson, the author of Current Biology, titled "The Dangers of Baleen Dielectomy Predicted in Bale", including Christopher Marshall and Mark Uhen.