Results 91 to 100 of about 7,856 (239)

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

open access: yesThe 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   +9 more
wiley   +1 more source

Habitat selection, parasites and injuries in Amazonian crocodilians

open access: yes, 1985
Caiman crocodilus is found most frequently in relatively warm, shallow or grassy areas in the larger rivers, lakes and canals of Amazonia. The habitats that it uses are increasing in area because of human activities.
Magnusson, W.
core  

Injuries in deep time: interpreting competitive behaviours in extinct reptiles via palaeopathology

open access: yesBiological Reviews, EarlyView.
ABSTRACT For over a century, palaeopathology has been used as a tool for understanding evolution, disease in past communities and populations, and to interpret behaviour of extinct taxa. Physical traumas in particular have frequently been the justification for interpretations about aggressive and even competitive behaviours in extinct taxa.
Maximilian Scott   +3 more
wiley   +1 more source

Sex determination [PDF]

open access: yes, 2012
Multicellular animals are a diverse lot, with widely varied body plans and lifestyles. One feature they share, however, is a nearly universal reliance on sexual reproduction for species propagation.
Gamble, Tony
core   +1 more source

On a dynamic reaction-diffusion mechanism: The spatial patterning of teeth primordia in the alligator [PDF]

open access: yes, 1996
It is now well established both theoretically and, more recently, experimentally, that steady-state spatial chemical concentration patterns can be formed by a number of specific reaction–diffusion systems.
Kulesa, P. M., Murray, J. D.
core   +1 more source

Beyond mammals: the evolution of chewing and other forms of oropharyngeal food processing in vertebrates

open access: yesBiological Reviews, EarlyView.
ABSTRACT Oropharyngeal food processing exhibits a remarkable diversity among vertebrates, reflecting the evolution of specialised ‘processing centres’ associated with the mandibular, hyoid, and branchial arches. Although studies have detailed various food‐processing strategies and mechanisms across vertebrates, a coherent and comprehensive terminology ...
Daniel Schwarz   +6 more
wiley   +1 more source

Crocodiles - the Singular Beast in the Renaissance Cabinet

open access: yes, 2017
Stuffed crocodiles often predominated many famous cabinets, hanging in the center of the ceiling. Crocodilians are the largest reptiles and the largest predator that spends time on land.
Zhang, Peter
core  

Sistrurus miliarius [PDF]

open access: yes, 1978
Number of Pages: 2Integrative BiologyGeological ...
Palmer, William M.
core   +1 more source

Pulmonary development in Squamata: Insights from embryonic studies using micro‐CT

open access: yesDevelopmental Dynamics, EarlyView.
Abstract Background Pulmonary development in tetrapods is a complex process, especially within squamates, where single‐chambered, transitional, and multi‐chambered lungs can be found in adult animals. While the embryological development of the respiratory system of lizards and snakes was studied in a number of species between the 1830s and 1940s, the ...
Barbara G. Champini   +3 more
wiley   +1 more source

Parentage test in broad-snouted caimans (Caiman latirostris, Crocodylidae) using microsatellite DNA

open access: yesGenetics and Molecular Biology, 2009
In this study, microsatellite markers, developed for Alligator mississipiensis and Caiman latirostris, were used to assess parentage among individuals from the captive colony of Caiman latirostris at the University of São Paulo, in Piracicaba, São Paulo,
Rodrigo B. Zucoloto   +4 more
doaj  

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