--- title: This New Dinosaur Had Tiny Arms Just Like T-Rex description: Tyrannosaurus rex just got a new friend to join its teeny-tiny arms club. canonical: https://time.com/4406326/new-dinosaur-tiny-arms-tyrannosaurus-rex/ author: Abigail Abrams article:opinion: false article:content_tier: free article:published_time: 2016-07-14T16:37:52.000Z article:modified_time: 2026-03-31T09:54:32.755Z article:section: Science og:title: This New Dinosaur Had Tiny Arms Just Like T-Rex og:description: The discovery may shed light on why some dinosaurs had short arms og:url: https://time.com/4406326/new-dinosaur-tiny-arms-tyrannosaurus-rex/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt114413488acefee3/69889bf9a988cafdb06b8a00/gualicho-shinyae.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 2560 og:image:height: 1440 og:image:alt: Presentation of Gualicho shinyae og:type: article twitter:card: summary_large_image twitter:title: This New Dinosaur Had Tiny Arms Just Like T-Rex twitter:description: The discovery may shed light on why some dinosaurs had short arms twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt114413488acefee3/69889bf9a988cafdb06b8a00/gualicho-shinyae.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # This New Dinosaur Had Tiny Arms Just Like Tyrannosaurus Rex > Sponsored content. 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It reaches 40,000 subscribers with a 34.2% open rate and a 2.1% click rate as of August 2026. #### Where can I follow the energy transition as a business story? Future Proof covers climate and energy as an economic and business story rather than only an environmental one. It publishes every Friday and is free at time.com/newsletters. #### Who writes Future Proof? Justin Worland, a senior correspondent at TIME and an award-winning climate journalist, writes Future Proof. #### Is Future Proof free? Yes. Future Proof is free at time.com/newsletters. by [Abigail Abrams](https://time.com/author/abigail-abrams/) ## Abigail Abrams Jul 14, 2016 4:37 PM UTC  A general view of Gualicho shinyae, an unusual carnivorous dinosaur that lived at the Argentinian Patagonia during the Superior Cretacious period, presented during an event in Buenos Aires on July 13, 2016. A general view of Gualicho shinyae, an unusual carnivorous dinosaur that lived at the Argentinian Patagonia during the Superior Cretacious period, presented during an event in Buenos Aires on July 13, 2016. Alberto Ortiz—EPA by [Abigail Abrams](https://time.com/author/abigail-abrams/) ## Abigail Abrams Jul 14, 2016 4:37 PM UTC Tyrannosaurus rex just got a new friend to join [its teeny-tiny arms club.](http://www.nytimes.com/2016/07/14/science/dinosaurs-short-arms-gualicho-shinyae.html?%5Fr=0) Gualicho shinyae, a newly identified dinosaur, was a distant relative of T-rex and had similarly small forearms and hands with two clawed fingers. Like the famous T-rex, this new dinosaur was carnivorous was a two-legged theropod, the New York _Times_ reports. But what paleontologists are really interested in is that Gualicho shinyae developed its short arms separately from T-rex, according to a new study in the journal [PLOS One](http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0157793#abstract0). Gualicho shinyae belongs to a different type of dinosaurs called allosaurus, which scientists previously saw with strong, full-sized arms. This is one of the few theropods with miniature arms, and scientists are hoping the new discovery could help them determine the evolutionary causes of these small limbs. “It begins to tell us a little bit about the story of how and why animals like T-rex and other theropods reduce their forearms,” Peter Makovicky, an author of the study told the _Times_. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4406326/new-dinosaur-tiny-arms-tyrannosaurus-rex/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4406326/new-dinosaur-tiny-arms-tyrannosaurus-rex/"},"headline":"This New Dinosaur Had Tiny Arms Just Like Tyrannosaurus Rex","datePublished":"2016-07-14T16:37:52.000Z","dateModified":"2026-03-31T09:54:32.755Z","description":"The discovery may shed light on why some dinosaurs had short arms","url":"https://time.com/4406326/new-dinosaur-tiny-arms-tyrannosaurus-rex/","keywords":["dinosaurs","Paleontology"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt114413488acefee3/69889bf9a988cafdb06b8a00/gualicho-shinyae.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Abigail Abrams","jobTitle":"","url":"https://time.com/author/abigail-abrams/"}],"articleSection":"Science","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt114413488acefee3/69889bf9a988cafdb06b8a00/gualicho-shinyae.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"Presentation of Gualicho shinyae","caption":"A general view of Gualicho shinyae, an unusual carnivorous dinosaur that lived at the Argentinian Patagonia during the Superior Cretacious period, presented during an event in Buenos Aires on July 13, 2016.","creditText":"Alberto Ortiz—EPA","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/science/","name":"Science"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/dinosaurs/","name":"dinosaurs"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/4406326/new-dinosaur-tiny-arms-tyrannosaurus-rex/","name":"This New Dinosaur Had Tiny Arms Just Like Tyrannosaurus Rex"}}]}] ```