Results 81 to 90 of about 12,664 (238)

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source

Measuring the Effects of a Research-Based Field Experience on Undergraduates and K-12 Teachers [PDF]

, 2001
During the summer of 1999, a new type of field course was taught in five of eastern Utah's National Parks and Monuments. It targeted a combination of university undergraduates and K-12 teachers, emphasized development of participants' problem-solving ...
Gregg Bluth, Jacqueline Huntoon, William Kennedy   +2 more
core   +1 more source

Osteohistology of two phorusrhacids reveals uninterrupted growth strategy

The Anatomical Record, EarlyView.
Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer, Christian Cooper, Jingmai O'Connor   +2 more
wiley   +1 more source

Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs

The Anatomical Record, EarlyView.
Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada, Takanobu Tsuihiji, Hiroki Ishikawa, Noriyuki Wakimizu, Soichiro Kawabe, Kodai Sakane   +5 more
wiley   +1 more source

Inter‐ and intraspecific variation in theropod dinosaur dental microwear and its palaeoecological implications

The Anatomical Record, EarlyView.
Abstract Differences in skull and tooth morphology, stomach contents, and estimated bite force between medium‐to‐large sized (≥100 kg) predatory theropod dinosaurs have long been suspected to correlate with differences in their diets and dietary guilds (e.g., hypercarnivory, piscivory).
Cassius Morrison, James Gregory, Christopher Jackson, Jordan Bestwick, Katlin Schroeder, Samuel J.L. Gascoigne, Paul Bills, Laura B. Porro, Philip D. Mannion, Paul M. Barrett   +9 more
wiley   +1 more source

Teeth of embryonic or hatchling sauropods from the Early Cretaceous (Berriasian) of Cherves-de-Cognac, France [PDF]

, 2016
Copyright © 2016 P.M. Barrett et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License (for details please see http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution,
Barrett, PM, Jones, F, Mazin, J-M, Pouech, J   +3 more
core   +4 more sources

Paleopathology of a putative colossosaurian caudal vertebra (Neosauropoda: Titanosauria) from the Presidente Prudente Formation, Brazil

The Anatomical Record, EarlyView.
Abstract Studies investigating paleopathologies in sauropods remain scarce despite their relative abundance in the fossil record. In this study we report new occurrence of paleopathological features, corresponding to a neoplasm found in a middle caudal vertebra (MCT.R.2120) of an advanced titanosaur from the Presidente Prudente Formation (Bauru Basin ...
Maria Luiza Peres Bertolossi, Kamila L. N. Bandeira, Roberta Veronese do Amaral, Arthur S. Brum, Rafael C. da Silva, Valéria Gallo   +5 more
wiley   +1 more source

Widespread distribution of large silesaurids evidenced by a new record from the Middle Triassic of southwest Gondwana

The Anatomical Record, EarlyView.
The largest silesaurid known from South America is described here, demonstrating that silesaurids reached large body sizes in southwestern Gondwana. This discovery further underscores the widespread geographic distribution and temporal persistence of large silesaurids across Pangea, despite faunal turnovers and environmental events such as the Carnian ...
Rodrigo Temp Müller
wiley   +1 more source

Cancellous bone and theropod dinosaur locomotion. Part I—an examination of cancellous bone architecture in the hindlimb bones of theropods [PDF]

, 2018
This paper is the first of a three-part series that investigates the architecture of cancellous (‘spongy’) bone in the main hindlimb bones of theropod dinosaurs, and uses cancellous bone architectural patterns to infer locomotor biomechanics in extinct ...
Aamodt, Abel, Adachi, Alexander, Alexander, Alexander, Alexander, Allen, Allen, Allmendinger, Amson, Andrada, Bakker, Bakker, Barak, Barak, Barthel, Batdorf, Batdorf, Bates, Beaupré, Beer, Bell, Ben-Zvi, Bennett, Benson, Bernsen, Bertram, Biewener, Biewener, Biewener, Biewener, Bishop, Bishop, Bishop, Bishop, Bishop, Blob, Blob, Blomberg, Bonnan, Boyle, Brassey, Brusatte, Butcher, Cardozo, Carlson, Carrano, Carrano, Carrano, Carrano, Carrano, Carrano, Carrano, Carrano, Carter, Carter, Chiappe, Chitale, Christen, Christiansen, Christiansen, Christiansen, Christiansen, Clarke, Clemente, Coelho, Coombs, Cowin, Cowin, Cowin, Cowin, Cracraft, Cresswell, Cruz-Orive, Cubo, Cunningham, Cunningham, Currey, Currey, Dacke, Davies, De Ricqlès, Demes, Demes, Demes, DeSilva, Donnell, Doube, Doube, Dunning, D’Anastasio, Elke, Enlow, Fariña, Farke, Farlow, Farlow, Farlow, Frost, Frost, Fyhrie, Garden, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gauthier, Gefen, Georgiou, Giddings, Gillette, Goldstein, Goldstein, Goodwin, Gorissen, Gosman, Gosman, Gross, Grossi, Hackett, Haddrath, Hammer, Harrigan, Havill, Hayes, Heers, Heinrich, Henderson, Heřt, Holtz, Hone, Horner, Horner, Hotton, Huiskes, Huiskes, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hébert, Hübner, Jacobs, Jacobs, Jang, Jang, Jang, Jarvis, Jetz, Judex, Kabel, Kambic, Kambic, Kamibayashi, Keaveny, Keaveny, Ketcham, Ketcham, Kivell, Koch, Koo, Kowalczyk, Ksepka, Ksepka, Lambers, Landini, Landini, Lane, Lanyon, Lanyon, Lanyon, Lee, Lee, Legendre, Lieberman, Lieberman, Lockley, Lovejoy, Macchiarelli, Maidment, Maidment, Maidment, Main, Main, Mallison, Mallison, Maquer, Martin, Matarazzo, Mazzetta, Middleton, Miller, Mitchell, Mittra, Molnar, Moreno, Morgan-Richards, Mullender, Murray, Nafei, Nafei, Naish, Novas, Odgaard, Odgaard, Odgaard, Ollion, Olmos, Ostrom, Owen, Oxnard, Parfitt, Paul, Paul, Paul, Pauwels, Pearson, Petterson, Phillips, Phillips, Phillips, Pidaparti, Pittman, Podsiadlo, Polk, Pontzer, Pontzer, Prum, Radin, Rafferty, Raichlen, Reid, Reilly, Robling, Robling, Rook, Rubenson, Rudman, Ruimerman, Russell, Ryan, Ryan, Ryan, Ryan, Ryan, Ryan, Ryan, Ryan, Saers, Saparin, Scherf, Scherf, Schulte, Schweitzer, Sereno, Shrout, Singh, Singh, Skedros, Skedros, Skedros, Skerry, Skinner, Smith, Smith, Smith, Stephens, Stoessel, Su, Su, Su, Sues, Sutherland, Sverdlova, Swartz, Takechi, Tanck, Thomas, Thomason, Thomason, Thompson, Thulborn, Thulborn, Tobin, Townsley, Townsley, Tsai, Tsai, Tsegai, Tsegai, Tsubota, Tsubota, Turner, Turner, Turner, Turner, Turner, Ulrich, Van der Meulen, Van der Reest, Van Rietbergen, Van Rietbergen, Vander Sloten, Verner, Volpato, Von Meyer, Wainwright, Wallace, Wallace, Wallace, Wang, Ward, Warton, Weingarten, Weishampel, Wellnhofer, Wilson, Winter, Wolff, Wolschrijn, Yang, Yuri, Zanno   +335 more
core   +3 more sources

Elliptic Fourier analysis as a tool for the taxonomic identification of isolated theropod pedal phalanges

The Anatomical Record, EarlyView.
Abstract Studies of Upper Cretaceous deposits in North America have provided invaluable insights into the continental ecosystems of this time. Theropod (Saurischia, Dinosauria) pedal phalanges are commonplace in these deposits but can be difficult to identify at a finer taxonomic resolution.
Trystan M. Warnock‐Juteau, Stephanie M. Smith, Thomas M. Cullen   +2 more
wiley   +1 more source