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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
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
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
Prehistoric Facts Extra #24: Thomas Holtz Dinosaurs
Prehistoric Facts Extra #24: Thomas Holtz Dinosaurs
Published: 2017/07/09
Channel: Christopher Grall
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
Jack Horner goodbye
Jack Horner goodbye
Published: 2016/06/01
Channel: Matt Volz
Behind the Bones 2014
Behind the Bones 2014
Published: 2014/05/26
Channel: Jessica Noviello
Charles Plosser on why we need the Federal Reserve
Charles Plosser on why we need the Federal Reserve
Published: 2016/12/14
Channel: Fox Business
Yul Thomas Football Highlights
Yul Thomas Football Highlights
Published: 2011/01/04
Channel: Dorian D
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
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
Tribute to Labocania
Tribute to Labocania
Published: 2009/04/24
Channel: Rapator2
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
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
13yr Morgan Manley 57.79s 400m AAU District Qualifier 2015
13yr Morgan Manley 57.79s 400m AAU District Qualifier 2015
Published: 2015/06/15
Channel: jaylen Outler
Revieing my figet spinner
Revieing my figet spinner
Published: 2017/05/29
Channel: thomas holtz
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
Sagan
Sagan's Toolkit: Weird Science, Pseudoscience, and Skepticism (Thomas Holtz)
Published: 2014/06/08
Channel: NCASVideo
Candidates Night 2017
Candidates Night 2017
Published: 2017/03/31
Channel: Farmer City
How the Tyrannosaurs Ruled the World – with David Hone
How the Tyrannosaurs Ruled the World – with David Hone
Published: 2017/07/05
Channel: The Royal Institution
Thomas Holtz
Thomas Holtz
Published: 2014/09/12
Channel: Wilhelmina Krutrök
Lecture Holtz 5
Lecture Holtz 5
Published: 2013/07/31
Channel: Skylar Somers
Torvosaurus: Dinosaur of the Day
Torvosaurus: Dinosaur of the Day
Published: 2016/03/26
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
Tyrannosaurus life episode2
Tyrannosaurus life episode2
Published: 2013/11/19
Channel: Spud Pokeyspud
Qianzhousaurus: Dinosaur of the Day
Qianzhousaurus: Dinosaur of the Day
Published: 2016/03/30
Channel: I Know Dino
Cetiosauriscus - Video Learning - WizScience.com
Cetiosauriscus - Video Learning - WizScience.com
Published: 2015/09/02
Channel: Wiz Science™
EAE Football Combine - D Thomas - RB - Adrian Peterson Combine 6-24-11
EAE Football Combine - D Thomas - RB - Adrian Peterson Combine 6-24-11
Published: 2011/08/21
Channel: CoachFitzgerald
Lecture Holtz 3
Lecture Holtz 3
Published: 2013/07/31
Channel: Skylar Somers
Deinocheirus mirificus completed.
Deinocheirus mirificus completed.
Published: 2015/01/23
Channel: blackraptor311
Tyrannosaurus life episode4
Tyrannosaurus life episode4
Published: 2014/01/11
Channel: Spud Pokeyspud
Thomas Holtz The Origins and paleobiology of Tyrannosaurids
Thomas Holtz The Origins and paleobiology of Tyrannosaurids
Published: 2010/09/02
Channel: 1DinosaurLover
Gynecological Oncologist Dr. Chris DeSimone
Gynecological Oncologist Dr. Chris DeSimone
Published: 2013/09/27
Channel: Ted Tabb
Lecture Holtz 4
Lecture Holtz 4
Published: 2013/07/31
Channel: Skylar Somers
Truth=Math=Beauty
Truth=Math=Beauty
Published: 2011/12/08
Channel: WilliamsCollege
Dr Stephen Brusatte - Tyrannosaur Discoveries
Dr Stephen Brusatte - Tyrannosaur Discoveries
Published: 2015/02/20
Channel: The University of Edinburgh
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
Paleontology at Carthage
Paleontology at Carthage
Published: 2015/01/30
Channel: carthagecollege
Lecture Holtz 2
Lecture Holtz 2
Published: 2013/07/31
Channel: Skylar Somers
Pleistocene Ground Sloths Video Project
Pleistocene Ground Sloths Video Project
Published: 2015/05/10
Channel: Alex Vy
Qianzhousaurus: I Know Dino Podcast Episode 19
Qianzhousaurus: I Know Dino Podcast Episode 19
Published: 2016/03/30
Channel: I Know Dino
Torvosaurus: I Know Dino Podcast Episode 16
Torvosaurus: I Know Dino Podcast Episode 16
Published: 2016/03/26
Channel: I Know Dino
From Bones to Behavior- Dr. Meaghan Wetherell
From Bones to Behavior- Dr. Meaghan Wetherell
Published: 2017/02/13
Channel: CWU Biology
Fossils: Lecture 4
Fossils: Lecture 4
Published: 2013/03/26
Channel: Chris Geissler
Walking with Dinosaurs
Walking with Dinosaurs
Published: 2015/12/02
Channel: Audiopedia
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
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 3
Fossils: Lecture 3
Published: 2013/03/25
Channel: Chris Geissler
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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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