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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
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, with Dr. Thomas Holtz
The Life and Times of Tyrannosaurus rex, with Dr. Thomas Holtz
Published: 2013/03/19
Channel: Burke Museum
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
PATG Thomas Holtz Interview
PATG Thomas Holtz Interview
Published: 2017/01/06
Channel: ExtermCentral
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
Prehistoric Facts Extra #24: Thomas Holtz Dinosaurs
Prehistoric Facts Extra #24: Thomas Holtz Dinosaurs
Published: 2017/07/09
Channel: Christopher Grall
Lecture Holtz 5
Lecture Holtz 5
Published: 2013/07/31
Channel: Skylar Somers
Why Are Raptors So Popular? | Analysis
Why Are Raptors So Popular? | Analysis
Published: 2017/04/16
Channel: Thagomizers
Sagan
Sagan's Toolkit: Weird Science, Pseudoscience, and Skepticism (Thomas Holtz)
Published: 2014/06/08
Channel: NCASVideo
PATG Dinosaur Pop Culture Roundtable Part 1
PATG Dinosaur Pop Culture Roundtable Part 1
Published: 2018/01/28
Channel: ExtermCentral
Exclusive interview with Thomas Holtz, Chief Executive Officer, at Multotec
Exclusive interview with Thomas Holtz, Chief Executive Officer, at Multotec
Published: 2017/10/02
Channel: Mining Review Africa
▶ Deinocheirus walking
▶ Deinocheirus walking
Published: 2014/10/22
Channel: dana evans
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
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
Deinocheirus mirificus completed.
Deinocheirus mirificus completed.
Published: 2015/01/23
Channel: blackraptor311
Revieing my figet spinner
Revieing my figet spinner
Published: 2017/05/29
Channel: thomas holtz
TV Show Themes Medley
TV Show Themes Medley
Published: 2016/09/06
Channel: beltwaybrass
Damme  Thomas Holtz mit Rooney
Damme Thomas Holtz mit Rooney
Published: 2016/11/18
Channel: Pegamo
LIVE - The U.S. Army Blues Swamp Romp featuring Tom Holtz, tuba
LIVE - The U.S. Army Blues Swamp Romp featuring Tom Holtz, tuba
Published: 2016/02/05
Channel: The United States Army Band "Pershing's Own"
Histories | Stegosaurus
Histories | Stegosaurus
Published: 2016/02/09
Channel: Thagomizers
Behind the Bones 2014
Behind the Bones 2014
Published: 2014/05/26
Channel: Jessica Noviello
Shabby Teapot
Shabby Teapot
Published: 2015/04/27
Channel: crafterscornerscreen
David Bandman - Mendez
David Bandman - Mendez
Published: 2013/05/26
Channel: David Bandman
A Cog in the machine
A Cog in the machine
Published: 2018/02/03
Channel: Kirsten van Miltenburg
Armed Forces Tribute
Armed Forces Tribute
Published: 2017/06/25
Channel: beltwaybrass
Lecture Holtz 3
Lecture Holtz 3
Published: 2013/07/31
Channel: Skylar Somers
Good Christian Men, Rejoice (In Dulci Jubilo)
Good Christian Men, Rejoice (In Dulci Jubilo)
Published: 2016/10/13
Channel: beltwaybrass
Living with dinosaurs by Ben Cooper aged 8
Living with dinosaurs by Ben Cooper aged 8
Published: 2013/05/14
Channel: Mike Cooper
Atoms For Peace
Atoms For Peace
Published: 2017/04/25
Channel: Audrey Silverman
Thomas Holtz
Thomas Holtz
Published: 2014/09/12
Channel: Wilhelmina Krutrök
Armed Forces Tribute
Armed Forces Tribute
Published: 2016/09/06
Channel: beltwaybrass
Lecture Holtz 2
Lecture Holtz 2
Published: 2013/07/31
Channel: Skylar Somers
Skating
Skating
Published: 2016/11/25
Channel: beltwaybrass
Lecture Holtz 4
Lecture Holtz 4
Published: 2013/07/31
Channel: Skylar Somers
Creole Gumbo Jazz Band
Creole Gumbo Jazz Band
Published: 2017/11/20
Channel: Joel Albert
VR~Nurse Larelle Birthday IceCream Social Challenge
VR~Nurse Larelle Birthday IceCream Social Challenge
Published: 2013/08/18
Channel: Crafticakes7
Creole Gumbo Jazz Band - I Found a New Baby
Creole Gumbo Jazz Band - I Found a New Baby
Published: 2017/11/20
Channel: Joel Albert
George Washington Bicentennial
George Washington Bicentennial
Published: 2016/09/06
Channel: beltwaybrass
All Star Jam
All Star Jam
Published: 2014/09/15
Channel: Kirk Armstrong
Creole Gumbo JaZz Band - "You Tell Me Your Dream"
Creole Gumbo JaZz Band - "You Tell Me Your Dream"
Published: 2017/11/20
Channel: Joel Albert
12 Days of Christmas
12 Days of Christmas
Published: 2016/11/25
Channel: beltwaybrass
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
On Eagle
On Eagle's Wings
Published: 2016/11/20
Channel: beltwaybrass
On Eagle
On Eagle's Wings
Published: 2016/04/03
Channel: beltwaybrass
ALTERED CANVAS 1
ALTERED CANVAS 1
Published: 2010/11/08
Channel: cricutera
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
Creole Gumbo Jazz Band - 11/19/2017
Creole Gumbo Jazz Band - 11/19/2017
Published: 2017/11/20
Channel: Joel Albert
Get Out - Live at Banff
Get Out - Live at Banff
Published: 2015/10/25
Channel: Theodore Van Dyck
Nancy Luca and Friends  -  Roadhouse Blues
Nancy Luca and Friends - Roadhouse Blues
Published: 2011/03/21
Channel: sndmann5
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from Thomas R. Holtz, Jr.)
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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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