Results 41 to 50 of about 1,382 (183)

Dwarfism and feeding behaviours in Oligo–Miocene crocodiles from Riversleigh, northwestern Queensland, Australia [PDF]

Acta Palaeontologica Polonica, 2016
Instances of dwarfism in the fossil record are of interest to palaeontologists because they often provide insight into aspects of palaeoecology. Fossil species of Australian-Pacific mekosuchine genus Mekosuchus have been described as dwarf, primarily ...
Michael Stein, Michael Archer, Suzanne J. Hand   +2 more
doaj   +1 more source

Clade‐wide morphological and functional variation of the sauropsid columella

The Anatomical Record, EarlyView.
Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock, Serjoscha W. Evers, Tiago R. Simões, Garth M. Spellman, Daniel J. Field   +4 more
wiley   +1 more source

Patterns of interspecific variation in the heart rates of embryonic reptiles. [PDF]

PLoS ONE, 2011
New non-invasive technologies allow direct measurement of heart rates (and thus, developmental rates) of embryos. We applied these methods to a diverse array of oviparous reptiles (24 species of lizards, 18 snakes, 11 turtles, 1 crocodilian), to identify
Wei-Guo Du, Hua Ye, Bo Zhao, Ligia Pizzatto, Xiang Ji, Richard Shine   +5 more
doaj   +1 more source

Crocodilians in Perspective! [PDF]

American Zoologist, 1989
The prediction of the 1960s that crocodilians would soon be extinct has happily proven to be unduly pessimistic. The survival and recovery of substantial stocks provides us with the unexpected opportunity to learn about their adaptations, important not only because of their place as relicts of a major reptilian radiation, but also as giant animals ...
openaire   +1 more source

Exploring the cranial morphology and possible convergences of Triassic non‐crocodylomorph pseudosuchians (Archosauria: Pseudosuchia) with other sauropsids through linear morphometrics

The Anatomical Record, EarlyView.
Abstract Triassic pseudosuchians had highly diversified cranial morphologies. These archosaurs occupied diverse ecological roles, ranging from terrestrial predators and herbivores to semiaquatic ambush predators and possible waders. Here, we apply linear cranial morphometrics to assess possible convergences with other sauropsids from the clades ...
Rafael Terras, Rodrigo Temp Müller, Leonardo Kerber, Mirian Carbonera   +3 more
wiley   +1 more source

Role of Chromosome Changes in Evolution and Diversity [PDF]

Genomics & Informatics, 2015
The karyotypes of most species of crocodilians were studied using conventional and molecular cytogenetics. These provided an important contribution of chromosomal rearrangements for the evolutionary processes of Crocodylia and Sauropsida (birds and ...
Kornsorn Srikulnath, Watcharaporn Thapana, Narongrit Muangmai   +2 more
doaj   +1 more source

CROCODILIANS

, 2009
This chapter presents a general overview of the anatomy, physiology, and treatment methodology for crocodilians. Most crocodilians grow to be larger than other reptile species and, therefore, have significant space requirements. Like most animals requiring an aquatic environment, crocodilians need water that is clean and free of disease.
openaire   +1 more source

New fossil unveils the dentary anatomy of the rare lepidosauromorph Cargninia enigmatica from the Upper Triassic of Southern Brazil

The Anatomical Record, EarlyView.
Abstract Nowadays, Lepidosauria is a diverse group represented by squamates and the rhynchocephalian tuatara. However, their origins date back to the end of the Permian Period, when the stem lineages Lepidosauromorpha and Archosauromorpha diverged. Within the lepidosauromorph stem lineage, a few species have been described with unstable phylogenetic ...
Lísie Vitória Soares Damke, Vitória Zanchett Dalle‐Laste, Leonardo Kerber, Lúcio Roberto‐da‐Silva, Rodrigo Temp Müller   +4 more
wiley   +1 more source

Occurrence of Gavialis gangeticus in the Lower Ganges of Bangladesh: urgent need for conservation initiatives

Journal of Fisheries
The gharial, Gavialis gangeticus, a Critically Endangered fish-eating crocodilian native to the Indian subcontinent, has long been considered nearly extirpated from Bangladesh, with records largely limited to incidental captures in fishing gear.
Nadia S. Kashmi, Md. Taskin Parvez, Shams M. Galib   +2 more
doaj   +1 more source

Sequential segmental analysis of the crocodilian heart [PDF]

Journal of Anatomy, 2017
AbstractDifferences between hearts of crocodilians and those of mammals and birds are only partly understood because there is no standardised approach and terminology for describing cardiac structure. Whereas most reptiles have an undivided ventricle, crocodilians have a fully septated ventricle.
Andrew C. Cook, Vi‐Hue Tran, Diane E. Spicer, Jafrin M. H. Rob, Shankar Sridharan, Andrew Taylor, Robert H. Anderson, Bjarke Jensen   +7 more
openaire   +4 more sources