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The Evolution Of Snake Like Body Form In Squamate Reptiles And The Phylogeny And Biogeography Of The Scincid Genus Plestiodon
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Book Synopsis The Evolution of Snake-like Body Form in Squamate Reptiles and the Phylogeny and Biogeography of the Scincid Genus Plestiodon by : Matthew Christopher Brandley
Download or read book The Evolution of Snake-like Body Form in Squamate Reptiles and the Phylogeny and Biogeography of the Scincid Genus Plestiodon written by Matthew Christopher Brandley and published by . This book was released on 2008 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Evolutionary Functional Morphology of Snake-like Body Shapes In Squamate Reptiles by : Gen Morinaga
Download or read book The Evolutionary Functional Morphology of Snake-like Body Shapes In Squamate Reptiles written by Gen Morinaga and published by . This book was released on 2018 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Why Does a Trait Evolve Multiple Times Within a Clade?: Repeated Evolution of Snakelike Body Form in Squamate Reptiles by :
Download or read book Why Does a Trait Evolve Multiple Times Within a Clade?: Repeated Evolution of Snakelike Body Form in Squamate Reptiles written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Phylogeny and Classification of Reptiles by : Samuel Wendell Williston
Download or read book The Phylogeny and Classification of Reptiles written by Samuel Wendell Williston and published by . This book was released on 1917 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reproductive Biology and Phylogeny of Snakes by : Robert D. Aldridge
Download or read book Reproductive Biology and Phylogeny of Snakes written by Robert D. Aldridge and published by CRC Press. This book was released on 2016-04-19 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering coverage of a wide range of topics on snake reproduction and phylogeny, this comprehensive book discusses everything from primordial germ migration in developing embryos to semelparity (death after reproduction) in the aspic viper. Beginning with a review of the history of snake reproductive studies, it presents new findings on development
Book Synopsis The Origin of Snakes by : Michael Wayne Caldwell
Download or read book The Origin of Snakes written by Michael Wayne Caldwell and published by CRC Press. This book was released on 2019-06-28 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents perspectives on the past and present state of the understanding of snake origins. It reviews and critiques data and ideas from paleontology and neontology (herpetology), as well as ideas from morphological and molecular phylogenetics. The author reviews the anatomy and morphology of extant snakes. Methods are also critiqued, including those empirical and theoretical methods employed to hypothesize ancestral ecologies for snakes. The modern debate on squamate phylogeny and snake ingroup phylogeny using molecules and morphology is examined critically to provide insights on origins and evolution. Key Features Important major evolutionary transformation in vertebrate evolution Continuing historical debate in vertebrate paleontology Of wide interest to a core audience of paleontologists, herpetologists, and morphologists Author acknowledged as prominent contributor to debate over snake origins Based on remarkable well preserved fossil specimens
Book Synopsis Phylogenetic Relationships Among Advanced Snakes by : John E. Cadle
Download or read book Phylogenetic Relationships Among Advanced Snakes written by John E. Cadle and published by Univ of California Press. This book was released on 1988-01-01 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph addresses questions concerning the evolutionary history of advanced snakes using molecular phylogenetic data. Viperids are the sister group of the other clades examined. Atractaspis may share a lineage with elapids. The study concludes that, because of sampling problems, many generalizations concerning snake evolution derived from the fossil record, particularly those about the age of lineages, are probably in error.
Book Synopsis The Origin and Early Evolutionary History of Snakes by : David J. Gower
Download or read book The Origin and Early Evolutionary History of Snakes written by David J. Gower and published by Cambridge University Press. This book was released on 2022-08-11 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Latest developments in understanding how, when and where the extraordinary body plan and ecology of snakes evolved from lizard ancestors.
Book Synopsis Convergent Evolution of Snake-Like Body Shapes in Squamates by : Sara Donna Wahlström Mann
Download or read book Convergent Evolution of Snake-Like Body Shapes in Squamates written by Sara Donna Wahlström Mann and published by . This book was released on 2020 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determining the Causes and Consequences of Speciation in Western North American Scincid Lizards of the Plestiodon Skiltonianus Species Complex (squamata: Scincidae). by : Jonathan Q Richmond
Download or read book Determining the Causes and Consequences of Speciation in Western North American Scincid Lizards of the Plestiodon Skiltonianus Species Complex (squamata: Scincidae). written by Jonathan Q Richmond and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation investigates a candidate example of parallel speciation in North American scincid lizards of the Plestiodon skiltonianus species group. Parallel speciation occurs when morphologically similar but phylogenetically distant populations are more reproductively compatible than are morphologically differentiated but closely related individuals. The skiltonianus group consists of two ecotypes that differ primarily in adult body size. A molecular phylogeny based on mtDNA showed that the larger ecotype, P. gilberti, evolved multiple times independently from within the smaller ecotype, P. skiltonianus. Although clades with opposite ecomorphology appear to be reproductively isolated, circumstantial evidence indicates that gilberti clades in secondary geographic contact may not be. The first two chapters provide explicit tests of the parallel speciation hypothesis. Chapter 1 describes mate compatibility experiments using wild-caught skinks that were designed to separate the effects of genetic differentiation, geographic separation and body size differentiation on mate compatibility. The difference in body size has a significant effect on the probability of copulation, whereas the other variables do not. I argue that the body size effect results from a mechanical constraint on copulation likely to be general for lizards. Chapter 2 describes a complementary molecular study using AFLP markers that was designed to test whether there is ongoing nuclear gene flow between gilberti clades, which come into geographic contact in the southern Sierra Nevada. Bayesian analyses show that the degree of population differentiation increases with increasing distance from the mtDNA contact zone; this provides evidence for gene flow between independently evolved clades of gilberti. To my knowledge, the skiltonianus group provides the first example of parallel ecological speciation in which the lineages that evolved in parallel are merging in nature. Chapter 3 examines patterns of morphological variation. Morphological variation is largely partitioned by sex and ecomorph. Subtle differences were also detected between the clades of gilberti, but these clades overlap substantially in morphology, emphasizing their morphological parallelism. Chapter 4 investigated broad-scale patterns of morphological evolution in North American Plestiodon. Comparative phylogenetic analyses were used test alternative hypotheses of character evolution, with the goal of providing insight into the developmental mechanisms that shaped the current morphological diversity.
Book Synopsis The Rattlesnakes, Genera Sistrurus and Crotalus by : Howard Kay Gloyd
Download or read book The Rattlesnakes, Genera Sistrurus and Crotalus written by Howard Kay Gloyd and published by . This book was released on 1940 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Snake Scale Microstructure by : Christine V. Schmidt
Download or read book Snake Scale Microstructure written by Christine V. Schmidt and published by . This book was released on 2012 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates whether micromorphological features of the oberhautchen of snake scales show adaptations to the animals' life habit. For the first time, the ventral scale microstructure of 41 snakes belonging to three different families (Pythonidae, Boidae, and Elapidae) is described. Species adapted to four different life habits (terrestrial, fossorial, arboreal, aquatic) were examined using scanning electron microscopy. Snakes (Serpentes) occur almost world-wide and occupy a variety of terrestrial, fossorial, arboreal, and aquatic habitats. Macromorphological adaptations to different life habits, such as body shape and size, are well known from the literature. Previous studies on snake scale microstructure were focused on dorsal scale microstructure. However, in spite of macroscopic similarity of the ventral scale surface among snakes, the ventral surface is extremely important from the functional point of view. Due to the loss of extremities, the epidermis of the ventral scale of a snake is in continuous contact with the substrate. Therefore, there is a special interest in revealing whether certain characteristics of ventral microstructure are determined by the biology of the species or if they reflect phylogenetic relationships. Careful analysis according to the author's newly revised terminology of microstructural features reveals that at least two major patterns of microstructure have evolved within snakes. The first comprises the ancestral microstructural pattern found in most of the snake families examined. The second pattern is derived and has evolved at least twice, independently. These two distinct types are assumed to represent different structural solutions for the same functional demands, such as propulsion generation due to frictional anisotropy, and minimization of wear. Modifications of certain features of these two major patterns appear to correlate with different strategies of habitat occupation. This study is of great interest to biologists studying animal integument, functional morphology, ecomorphology, and evolution of reptiles. In addition, the described diversity of microstructures might inspire surface scientists to mimic similar features in polymer surfaces, in order to generate innovative biologically- inspired surface-active materials with novel properties.
Book Synopsis The Venomous Rattlesnakes and New World Coral Snakes by : Jacobo Reyes-Velasco
Download or read book The Venomous Rattlesnakes and New World Coral Snakes written by Jacobo Reyes-Velasco and published by . This book was released on 2015 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Middle America is one of the most biologically diverse regions in the world, however it also possesses some of the highest rates of biodiversity loss. Reptiles are especially diverse in this region, and are a very important component of the biota, from a biological as well as a cultural perspective. Venomous snakes are the most studied group of reptiles in Mexico and Central America, as they are of great ecological and medical importance. Nevertheless, our understanding of the evolutionary relationships of many groups of venomous snakes is superficial. Understanding these relationships is no trivial matter as it is fundamental to appropriately address broader evolutionary questions. Herein I examine the systematic relationships of the two most diverse lineages of venomous snakes in Middle America, the rattlesnakes (genus Crotalus) and the coralsnakes (genus Micrurus). In particular, I studied the phylogenetic relationships of an obscure lineage of rattlesnakes, the longtailed rattlesnakes, as well as the phylogeny and species limits of coralsnakes in the diastema species complex of the genus Micrurus. I used nuclear and mitochondrial genes to test if the longtailed rattlesnakes form a monophyletic group and to estimate their closest relatives within the genus. By doing so, I provide the most robust molecular phylogeny for the rattlesnakes to date. Relationships among coralsnakes are known to be difficult to estimate with the use of DNA markers obtained from traditional sequencing techniques. Therefore, I use a combination of traditional sequencing of mitochondrial DNA and next generation sequencing (in the form of double digest restriction associated DNA sequencing, ddradseq), to elucidate evolutionary relationships and species limits within the diastema species complex of coralsnakes. Lastly, I made use of the Burmese python genome as a proxy to understand how non-venom genes became recruited into venom systems in the most recent ancestor of both coralsnakes and rattlesnakes.
Book Synopsis Phylogenetic and Biogeographic Patterns of Basiliscine Iguanians by : Mathias Lang
Download or read book Phylogenetic and Biogeographic Patterns of Basiliscine Iguanians written by Mathias Lang and published by . This book was released on 1989 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Phylogeny and Classification of Reptiles by : Samuel Wendell Williston
Download or read book The Phylogeny and Classification of Reptiles written by Samuel Wendell Williston and published by . This book was released on 1917 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Revision of the Neotropical Snake Genus Chironius Fitzinger (Serpentes, Colubridae) by : John Alton Wiest
Download or read book Revision of the Neotropical Snake Genus Chironius Fitzinger (Serpentes, Colubridae) written by John Alton Wiest and published by . This book was released on 1978 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Who Were the Lawrences? by : Bayside Historical Society
Download or read book Who Were the Lawrences? written by Bayside Historical Society and published by . This book was released on 1964 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
