Results 91 to 100 of about 162,674 (286)

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

The Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

Prevalence of Endo-Parasites of Common Tree Frog Rana Saharica from Misurata, Libya

Sudan Journal of Medical Sciences, 2018
The current study was conducted to detect the prevalence of parasitic infection among (62) common tree frogs (Rana Saharica), of different ages, with weights ranged between 1 and 25g.
Elmajdoub O. Layla, Shabash H. Elhamali, Omar A. Mosaab, Aborawis M. Afaf   +3 more
doaj   +1 more source

Inbreeding ratio and genetic relationships among strains of the Western clawed frog, Xenopus tropicalis [PDF]

, 2015
The Western clawed frog, Xenopus tropicalis, is a highly promising model amphibian, especially in developmental and physiological research, and as a tool for understanding disease.
Fujii, Tamotsu, Guille, Matt, Horb, Marko E., Igawa, Takeshi, Kashiwagi, Akihiko, Kashiwagi, Keiko, Noble, Anna, Simpson, David E., Sumida, Masayuki, Suzuki, Atsushi, Watanabe, Ai   +10 more
core   +4 more sources

Growth dynamics, skeletochronology, and histovariability of the theropod dinosaur Berthasaura leopoldinae

The Anatomical Record, EarlyView.
Osteohistological sampling on different bones of theropod dinosaur documents discrepant age record, growth, and metabolism. This could result unprecise paleobiological inferences if samplings are based on single bones. However, multi‐bone sampling can attenuate these discrepancies, helping to infer growth dynamics and physiology of these extinct ...
Geovane Alves de Souza, Marina Bento Soares, Luiz Carlos Weinschütz, Alexander Wilhelm Armin Kellner   +3 more
wiley   +1 more source

Eastern cricket frog Acris crepitans distribution and reintroduction efforts informed by wetland habitat and overwintering temperatures

Endangered Species Research
Reintroduction as a wildlife management strategy is becoming increasingly common and has had varied levels of success. To ensure a successful reintroduction, it is important to consider historical survey data, habitat preferences, and species ...
EM Edwards, BA Mosher, P Sullivan, RO Mummah   +3 more
doaj   +1 more source

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Volunteer Conservation Action Data Reveals Large-Scale and Long-Term Negative Population Trends of a Widespread Amphibian, the Common Toad (Bufo bufo).

PLoS ONE, 2016
Rare and threatened species are the most frequent focus of conservation science and action. With the ongoing shift from single-species conservation towards the preservation of ecosystem services, there is a greater need to understand abundance trends of ...
Silviu O Petrovan, Benedikt R Schmidt
doaj   +1 more source

The likely effects of thermal climate change on vertebrate skeletal muscle mechanics with possible consequences for animal movement and behaviour [PDF]

, 2019
Climate change can involve alteration in the local temperature that an animal is exposed to, which in turn may affect skeletal muscle temperature.
Abrahams, Allan, Allen, Altringham, Altringham, Angilletta, Angilletta, Barany, Beever, Bennett, Bennett, Bennett, Berchtold, Bernal, Bershitsky, Brenner, Caiozzo, Chown, Colombini, Cotton, Coughlin, Coupland, Crowley, De Ruiter, Debold, Decostre, Donley, Donley, Edwards, Evans, Ferguson, Fitts, Gabriel, Glanville, Herrel, Herrel, Hertz, Higham, Hill, Hochachka, Hou, Hudson, Huey, Husak, IPCC, James, James, James, James, John-Alder, Johnson, Johnson, Johnston, Johnston, Jones, Josephson, Lailvaux, Le Roy, Mantle, Marsh, Mautz, Michelangeli, Miles, Niehaus, Nocella, Olberding, Perry, Pinder, Place, Rall, Ranatunga, Ranatunga, Ranatunga, Rand, Reilly, Rome, Roots, Rummel, Seebacher, Seebacher, Seebacher, Seebacher, Seebacher, Seebacher, Segal, Segre, Shuman, Somero, Stein, Storey, Swoap, Syme, Symonds, Vanhooydonck, Watkins, West, Wilson, Wilson, Wilson, Wilson, Wilson   +100 more
core   +1 more source

Oldest well‐preserved euprimate petrosal, from the early Eocene of India (Vastan Lignite Mine, Gujarat)

The Anatomical Record, EarlyView.
Abstract An exquisitely preserved, isolated partial petrosal with associated fragmentary stapes is described from the Vastan Lignite Mine (Gujarat, India), dated to the early Eocene (~54.5 Ma). Several anatomical traits (e.g., large petrosal plate; posterolateral entry of the internal carotid artery to the tympanic cavity; bony tubes surrounding the ...
Mary T. Silcox, Kenneth D. Rose, Rachel H. Dunn, Kishor Kumar, Rajendra S. Rana, Ashok Sahni, Lachham Singh, Thierry Smith, Jordan W. Crowell   +8 more
wiley   +1 more source

Composition and Functional Specialists of the Gut Microbiota of Frogs Reflect Habitat Differences and Agricultural Activity

Frontiers in Microbiology, 2018
The physiological impact of agricultural pollution, habitat disturbance, and food source variability on amphibian remains poorly understood. By comparing the composition and predicted functions of gut microbiota of two frog species from forest and ...
Bing-Hong Huang, Chun-Wen Chang, Chun-Wen Chang, Chih-Wei Huang, Jian Gao, Jian Gao, Pei-Chun Liao   +6 more
doaj   +1 more source