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The Life and Times of a Tyrannosaurus rex presented by Dr. Thomas R. Holtz, Jr.
The Life and Times of a Tyrannosaurus rex presented by Dr. Thomas R. Holtz, Jr.
Published: 2013/07/31
Channel: Skylar Somers
The Life and Times of Tyrannosaurus rex, with Dr. Thomas Holtz
The Life and Times of Tyrannosaurus rex, with Dr. Thomas Holtz
Published: 2013/03/19
Channel: Burke Museum
PATG Thomas Holtz Interview
PATG Thomas Holtz Interview
Published: 2017/01/06
Channel: ExtermCentral
Popular Science Fiction and the Genesis of Paranormal Claims (Thomas Holtz)
Popular Science Fiction and the Genesis of Paranormal Claims (Thomas Holtz)
Published: 2015/06/29
Channel: NCASVideo
Dr. Thomas Holtz Jr. - "Carnivorous Dinosaurs: Fierce, Fast, and... Feathered?!?!"
Dr. Thomas Holtz Jr. - "Carnivorous Dinosaurs: Fierce, Fast, and... Feathered?!?!"
Published: 2017/04/02
Channel: Kevin Sievers
The Life and Times of Tyrannosaurus Rex, by Dr. Thomas Holtz. Lecture
The Life and Times of Tyrannosaurus Rex, by Dr. Thomas Holtz. Lecture
Published: 2013/03/09
Channel: George
The Life and Times of Tyrannosaurus Rex, by Dr. Thomas Holtz. Q&A
The Life and Times of Tyrannosaurus Rex, by Dr. Thomas Holtz. Q&A
Published: 2013/03/09
Channel: George
Jurassic World Dinosaur Field Guide (Jurassic World) by Dr. Thomas R. Holtz, Jr.
Jurassic World Dinosaur Field Guide (Jurassic World) by Dr. Thomas R. Holtz, Jr.
Published: 2017/06/17
Channel: teramat
Revieing my figet spinner
Revieing my figet spinner
Published: 2017/05/29
Channel: thomas holtz
Cetiosauriscus - Video Learning - WizScience.com
Cetiosauriscus - Video Learning - WizScience.com
Published: 2015/09/02
Channel: Wiz Science™
Behind the Bones 2014
Behind the Bones 2014
Published: 2014/05/26
Channel: Jessica Noviello
Tribute to Labocania
Tribute to Labocania
Published: 2009/04/24
Channel: Rapator2
Jack Horner goodbye
Jack Horner goodbye
Published: 2016/06/01
Channel: Matt Volz
"Come Fly With Me" sung by Thomas Holtz
"Come Fly With Me" sung by Thomas Holtz
Published: 2017/05/15
Channel: Thomas Holtz
Sagan
Sagan's Toolkit: Weird Science, Pseudoscience, and Skepticism (Thomas Holtz)
Published: 2014/06/08
Channel: NCASVideo
Qianzhousaurus: Dinosaur of the Day
Qianzhousaurus: Dinosaur of the Day
Published: 2016/03/30
Channel: I Know Dino
Tom Miller tributes Tom Holtz 12-8-2015
Tom Miller tributes Tom Holtz 12-8-2015
Published: 2015/12/08
Channel: Reverend Angel Dust
Thomas Holtz The Origins and paleobiology of Tyrannosaurids
Thomas Holtz The Origins and paleobiology of Tyrannosaurids
Published: 2010/09/02
Channel: 1DinosaurLover
The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages
The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages
Published: 2014/07/09
Channel: Eu coleciono dinossauros
GEOL204 Alana Sadur, Jeremy Sabrio, James Talbert, Walter Giusti
GEOL204 Alana Sadur, Jeremy Sabrio, James Talbert, Walter Giusti
Published: 2015/05/11
Channel: Jeremy Sabrio
Deinocheirus mirificus completed.
Deinocheirus mirificus completed.
Published: 2015/01/23
Channel: blackraptor311
Response to  "DEBUNKED: Top 5 "Climate Change" Myths" by Louder with Crowder
Response to "DEBUNKED: Top 5 "Climate Change" Myths" by Louder with Crowder
Published: 2016/09/12
Channel: potholer54
Pleistocene Ground Sloths Video Project
Pleistocene Ground Sloths Video Project
Published: 2015/05/10
Channel: Alex Vy
Jurassic World Dinosaur Field Guide (Jurassic World) by Dr. Thomas R. Holtz, Jr.
Jurassic World Dinosaur Field Guide (Jurassic World) by Dr. Thomas R. Holtz, Jr.
Published: 2017/05/10
Channel: klobott
Torvosaurus: Dinosaur of the Day
Torvosaurus: Dinosaur of the Day
Published: 2016/03/26
Channel: I Know Dino
Jurassic World Dinosaur Field Guide (Jurassic World) by Dr. Thomas R. Holtz, Jr.
Jurassic World Dinosaur Field Guide (Jurassic World) by Dr. Thomas R. Holtz, Jr.
Published: 2017/05/20
Channel: Seret Yatew
Candidates Night 2017
Candidates Night 2017
Published: 2017/03/31
Channel: Farmer City
Walking with Dinosaurs
Walking with Dinosaurs
Published: 2015/12/02
Channel: Audiopedia
Thomas Holtz
Thomas Holtz
Published: 2014/09/12
Channel: Wilhelmina Krutrök
Fossils: Lecture 3
Fossils: Lecture 3
Published: 2013/03/25
Channel: Chris Geissler
Blu-ray update 6/30/15: Heavyweights, western, + JW field gui
Blu-ray update 6/30/15: Heavyweights, western, + JW field gui
Published: 2015/06/30
Channel: NewWaveFan1
Fossils: Lecture 4
Fossils: Lecture 4
Published: 2013/03/26
Channel: Chris Geissler
Tyrannosaurus life episode4
Tyrannosaurus life episode4
Published: 2014/01/11
Channel: Spud Pokeyspud
Torvosaurus: I Know Dino Podcast Episode 16
Torvosaurus: I Know Dino Podcast Episode 16
Published: 2016/03/26
Channel: I Know Dino
Tyrannosaurus life episode2
Tyrannosaurus life episode2
Published: 2013/11/19
Channel: Spud Pokeyspud
Flying Fats | XCOM 2 Legend - Fast & Fierce #10
Flying Fats | XCOM 2 Legend - Fast & Fierce #10
Published: 2016/02/12
Channel: xwynns
Lecture Holtz 5
Lecture Holtz 5
Published: 2013/07/31
Channel: Skylar Somers
The Inauguration of Frostburg State University
The Inauguration of Frostburg State University's 15th President: Dr. Ronald H. Nowaczyk
Published: 2017/05/11
Channel: Frostburg State University
The Evolution Of Feathers
The Evolution Of Feathers
Published: 2016/12/08
Channel: Wochit News
Dr Stephen Brusatte - Tyrannosaur Discoveries
Dr Stephen Brusatte - Tyrannosaur Discoveries
Published: 2015/02/20
Channel: The University of Edinburgh
Qianzhousaurus: I Know Dino Podcast Episode 19
Qianzhousaurus: I Know Dino Podcast Episode 19
Published: 2016/03/30
Channel: I Know Dino
13 Cameras - Trailer
13 Cameras - Trailer
Published: 2016/01/28
Channel: IWPictures
Paleontology at Carthage
Paleontology at Carthage
Published: 2015/01/30
Channel: carthagecollege
Lecture Holtz 4
Lecture Holtz 4
Published: 2013/07/31
Channel: Skylar Somers
Lecture Holtz 3
Lecture Holtz 3
Published: 2013/07/31
Channel: Skylar Somers
Lecture Holtz 2
Lecture Holtz 2
Published: 2013/07/31
Channel: Skylar Somers
Tom Cruise Scientology Video - ( Original UNCUT )
Tom Cruise Scientology Video - ( Original UNCUT )
Published: 2008/01/17
Channel: Aleteuk
John Riegert, Space Gallery, Pittsburgh 2016
John Riegert, Space Gallery, Pittsburgh 2016
Published: 2016/06/23
Channel: Christopher Ruane
The BIGGEST BADDEST Dinosaur in Europe!
The BIGGEST BADDEST Dinosaur in Europe!
Published: 2014/03/06
Channel: SourceFed
Driftshow and other showcars at course automobile de Biere 2015
Driftshow and other showcars at course automobile de Biere 2015
Published: 2015/11/12
Channel: MPZRACEVIDEO
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WIKIPEDIA ARTICLE

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Thomas Richard Holtz Jr., Ph.D. (born 1965 in Los Angeles) is an American vertebrate palaeontologist and senior lecturer at the University of Maryland's Department of Geology.[1] He has published extensively on the phylogeny, morphology, ecomorphology, and locomotion of terrestrial predators, especially on tyrannosaurids and other theropod dinosaurs.[1] He wrote the book Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages and is the author or co-author of the chapters "Saurischia",[2] "Basal Tetanurae",[3] and "Tyrannosauroidea"[4] in the second edition of The Dinosauria. He has also been consulted as a scientific advisor for the Walking With Dinosaurs BBC series.

He is also the director of the Science and Global Change Program within the College Park Scholars living-learning community at the University of Maryland, College Park.

Theories[edit]

Holtz has come up with several new theories and hypotheses about the dinosaurs' classification. For example, he coined the terms Maniraptoriformes and Arctometatarsus. He also proposed two classification systems for theropods. The first is the clade Arctometatarsalia, made up of tyrannosauroids, ornithomimosaurs, and troodontids, because all of these coelurosaurs had pinched middle metatarsal bones in their feet. In this proposed classification system, the tyrannosauroids were supposedly basal to a clade known as Bullatosauria, which was made up of the Troodontidae and the Ornithomimosauria. These two groups were purported to form a clade, because they both shared a common characteristic; which was a skull capsule. However, later on, both of these classification systems were found to be paraphyletic, or "artificial", clades. For example, troodontids are now known to be deinonychosaurs, or "raptors", closely related to dromaeosaurids and birds. The discovery of basal tyrannosauroids, such as Guanlong, which lacked an arctometatarsus, also helped to disprove this theory. And, eventually, the "skull capsule" in troodontids and ornithomimosaurs was found to be an example of convergent evolution, causing the clade Bullatosauria to be abandoned.

Holtz was also a key figure in the discovery that tyrannosauroids were not carnosaurs, as had been previously believed by most palaeontologists, but rather large coelurosaurs. By being one of the very first scientists to theorise this, Holtz contributed greatly to the debunking of a monophyletic Carnosauria.

Selected publications[edit]

Footnotes[edit]

  1. ^ a b Holtz, Thomas R. Holtz Jr..
  2. ^ "Saurischia", pp. 21–23, with H. Osmólska
  3. ^ "Basal Tetanurae", pp. 71–110, with R. E. Molnar, P. J. Currie
  4. ^ "Tyrannosauroidea", pp. 111–136.

References[edit]

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