ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel
  • »
  • Education and Science»
  • Life Sciences

Raptorex kriegsteini a new Tyrannosaurus relative

Updated on August 3, 2016
Click thumbnail to view full-size

More than you ever wanted to know about this new tiny T. rex, the newly named and described Raptorex kriegsteini!

Raptorex kriegsteini is the new dinosaur described by Paul Sereno and his team of scientists from the University of Chicago. It was named in the AAAS-run journal Science. 1

Raptorex is closely related to tyrannosaurid dinosaurs (like Tyrannosaurus rex or T. rex for short). What is interesting and special about Raptorex is that it shows many of the adaptations present in its larger cousins, the tyrannosaurids, for crush-type biting as well as legs which are proportioned for running. Many of the earlier known primitive tyrannosaurid relatives look much more like the early coelurosaurs from which the tyrannosaurids descended and not very much like the tyrannosaurids themselves except in a few skeletal features. Raptorex is the first discovered which closely looks much like its more advanced cousins.

In fact, Raptorex looks so much like tyrannosaurids, that at first, it was thought to be a young specimen of an already known tyrannosaurid, the much larger Tarbosaurus. According to the location it was found at though, it would be much too old geologically to be Tarbosaurus. But that's where the twist comes in, Raptorex was originally collected illegally and sold in the private market as a young specimen of Tarbosaurus. The buyer, Henry J. Kriegstein, suspected he had a specimen, and it turns out he may have been right. This isn't the first time it's been suspected that a primitive tyrannosaurid or tyrannosaurid relative is a juvenile of an already described species. For example, many young Tyrannosaurus and Tarbosaurus specimens were originally classified separately as different species known as 'aublysodontines'. As it turns out though, 'aublysodontines' simply were juvenile tyrannosaurids which looked different than their larger adult forms. Some people think that the tyrannosaurid Alioramus may represent a juvenile Tarbosaurus as well, but as this idea is only a rumor, I would be cautious of it. At any rate, Sereno et al. managed to push Raptorex through peer-review in a high ranking journal and it seems very likely that it may well be a separate species. 

The specimen is very interesting either way, even if it did turn out to be a juvenile. It is very complete, which is not very common for small tyrannosaurid fossils (separate species or not).

1Sereno, P.C., Tan, L., Brusatte, S. L., Kriegstein, H. J., Zhao, X., and Cloward, K. 2009. Tyrannosaurid skeletal design first evolved at small body size. Science Express, doi:10.1126/science.1177428

Comments

    0 of 8192 characters used
    Post Comment

    No comments yet.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: "https://hubpages.com/privacy-policy#gdpr"

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)