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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
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
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
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
Terminator Pigs, Walking Whales & Demon Ducks: Wonders of the World After the Dinosaurs
Terminator Pigs, Walking Whales & Demon Ducks: Wonders of the World After the Dinosaurs
Published: 2017/07/20
Channel: NCASVideo
Sagan
Sagan's Toolkit: Weird Science, Pseudoscience, and Skepticism (Thomas Holtz)
Published: 2014/06/08
Channel: NCASVideo
Prehistoric Facts Extra #24: Thomas Holtz Dinosaurs
Prehistoric Facts Extra #24: Thomas Holtz Dinosaurs
Published: 2017/07/09
Channel: Christopher Grall
Goalcast
Goalcast's Top 10 Most Epic Inspirational Speeches | Vol. 1
Published: 2017/05/17
Channel: Goalcast
Behind the Bones 2014
Behind the Bones 2014
Published: 2014/05/26
Channel: Jessica Noviello
Jack Horner goodbye
Jack Horner goodbye
Published: 2016/06/01
Channel: Matt Volz
Lecture Holtz 5
Lecture Holtz 5
Published: 2013/07/31
Channel: Skylar Somers
From Bones to Behavior- Dr. Meaghan Wetherell
From Bones to Behavior- Dr. Meaghan Wetherell
Published: 2017/02/13
Channel: CWU Biology
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
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
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
Hollow Earth, Sunken Continents & A Universe Made of Plankton?  A Look at "Paranormal" Geology
Hollow Earth, Sunken Continents & A Universe Made of Plankton? A Look at "Paranormal" Geology
Published: 2016/07/06
Channel: NCASVideo
R. Albert Mohler Jr. - "As It Had Been the Face of an Angel - A Commission for God
R. Albert Mohler Jr. - "As It Had Been the Face of an Angel - A Commission for God's Messengers"
Published: 2017/05/19
Channel: Southern Seminary
Truth=Math=Beauty
Truth=Math=Beauty
Published: 2011/12/08
Channel: WilliamsCollege
Revieing my figet spinner
Revieing my figet spinner
Published: 2017/05/29
Channel: thomas holtz
Gynecological Oncologist Dr. Chris DeSimone
Gynecological Oncologist Dr. Chris DeSimone
Published: 2013/09/27
Channel: Ted Tabb
Lecture Holtz 2
Lecture Holtz 2
Published: 2013/07/31
Channel: Skylar Somers
Thomas Holtz
Thomas Holtz
Published: 2014/09/12
Channel: Wilhelmina Krutrök
Tribute to Labocania
Tribute to Labocania
Published: 2009/04/24
Channel: Rapator2
Cetiosauriscus - Video Learning - WizScience.com
Cetiosauriscus - Video Learning - WizScience.com
Published: 2015/09/02
Channel: Wiz Science™
Tom Miller tributes Tom Holtz 12-8-2015
Tom Miller tributes Tom Holtz 12-8-2015
Published: 2015/12/08
Channel: Reverend Angel Dust
Shamarko Thomas Fumble Return TD
Shamarko Thomas Fumble Return TD
Published: 2010/09/10
Channel: badabing0319
Tyrannosaurus life episode2
Tyrannosaurus life episode2
Published: 2013/11/19
Channel: Spud Pokeyspud
Jp holtz knockout in slowmo
Jp holtz knockout in slowmo
Published: 2012/10/06
Channel: Dissonu366
Deinocheirus mirificus completed.
Deinocheirus mirificus completed.
Published: 2015/01/23
Channel: blackraptor311
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
Fossils: Lecture 3
Fossils: Lecture 3
Published: 2013/03/25
Channel: Chris Geissler
Tyrannosaurus life episode4
Tyrannosaurus life episode4
Published: 2014/01/11
Channel: Spud Pokeyspud
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
Qianzhousaurus: Dinosaur of the Day
Qianzhousaurus: Dinosaur of the Day
Published: 2016/03/30
Channel: I Know Dino
Walking with Dinosaurs
Walking with Dinosaurs
Published: 2015/12/02
Channel: Audiopedia
Torvosaurus: Dinosaur of the Day
Torvosaurus: Dinosaur of the Day
Published: 2016/03/26
Channel: I Know Dino
Pleistocene Ground Sloths Video Project
Pleistocene Ground Sloths Video Project
Published: 2015/05/10
Channel: Alex Vy
Dinosaurs and Fossil Preparation
Dinosaurs and Fossil Preparation
Published: 2013/08/30
Channel: Mark R Graham
Torvosaurus: I Know Dino Podcast Episode 16
Torvosaurus: I Know Dino Podcast Episode 16
Published: 2016/03/26
Channel: I Know Dino
Kenneth J. Lacovara, en conferencia de prensa
Kenneth J. Lacovara, en conferencia de prensa
Published: 2016/12/17
Channel: Ciudadanía DigitalX
Yul Thomas Football Highlights
Yul Thomas Football Highlights
Published: 2011/01/04
Channel: Dorian D
Dion Holmes # 41 Highight Vero Beach Football LB 2009 Jr
Dion Holmes # 41 Highight Vero Beach Football LB 2009 Jr
Published: 2009/12/18
Channel: meet2145
Thomas die kleine Lokomotive im Steinbruch BRIO Holzeisenbahn Spielzeug Kanal für Kinder Kinderkanal
Thomas die kleine Lokomotive im Steinbruch BRIO Holzeisenbahn Spielzeug Kanal für Kinder Kinderkanal
Published: 2014/12/14
Channel: TipTapTube
Luke Combs - When It Rains It Pours
Luke Combs - When It Rains It Pours
Published: 2017/08/15
Channel: LukeCombsVEVO
Flying Fats | XCOM 2 Legend - Fast & Fierce #10
Flying Fats | XCOM 2 Legend - Fast & Fierce #10
Published: 2016/02/12
Channel: xwynns
Qianzhousaurus: I Know Dino Podcast Episode 19
Qianzhousaurus: I Know Dino Podcast Episode 19
Published: 2016/03/30
Channel: I Know Dino
Márcia Salomon  06. Tons de outono (J.C.Costa Netto)
Márcia Salomon 06. Tons de outono (J.C.Costa Netto)
Published: 2014/09/21
Channel: Dabliú Discos
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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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