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Tuesday, May 5, 2020 | History

3 edition of distribution and evolution of viviparity in reptiles found in the catalog.

distribution and evolution of viviparity in reptiles

Donald W. Tinkle

distribution and evolution of viviparity in reptiles

by Donald W. Tinkle

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  • 19 Currently reading

Published by Museum of Zoology, University of Michigan in Ann Arbor .
Written in English

    Subjects:
  • Reptiles -- Reproduction.,
  • Viviparity.,
  • Reptiles -- Evolution.

  • Edition Notes

    Bibliography: p. 47-55.

    Statementby Donald W. Tinkle and J. Whitfield Gibbons.
    SeriesMiscellaneous publications - Museum of Zoology, University of Michigan ; no. 154, Miscellaneous publications (University of Michigan. Museum of Zoology) ;, no. 154.
    ContributionsGibbons, J. Whitfield, 1939- joint author.
    Classifications
    LC ClassificationsQL669.3 .T56
    The Physical Object
    Pagination55 p. :
    Number of Pages55
    ID Numbers
    Open LibraryOL4377252M
    LC Control Number78620896

    In this book separate chapters examine the evolution of variation in egg and neonate size, of viviparity and other forms of bearing, and of differences in the duration of incubation, gestation, and lactation. The author examines the distribution of parental care among offspring, reviews the empirical evidence that parents invest to /5(3). Reptiles and Amphibians - Introduction, Distribution, and Life History Amphibians and reptiles are important components of aquatic and terrestrial ecosystems. Amphibians constitute an important part of the food web; they consume insects and other invertebrates, and they are prey for a long list of fish, reptile, bird, and mammal species, and.

    Reptile - Reptile - Evolution and paleontology: The first land vertebrates, the Tetrapoda, appeared about million years ago, near the middle of the Devonian Period. Despite having limbs rather than fins, early tetrapods were not completely terrestrial because their eggs and larvae depended upon a moist aquatic habitat. The first tetrapods apparently soon diverged; one lineage became the. Online shopping for Reptile & Amphibian Care Books in the Books Store. Reptiles & Amphibians. This Drawing Pad Belongs to _____! My Secret Book of Scribblings and Sketches: Sketch Book for Kids (Big Dreams Art Supplies Sketch Books)

      Depending on how strictly you define the term, there are two prime candidates for the first-ever reptile. One is the early Carboniferous Period (about million years ago) Westlothiana, from Europe, which laid leathery eggs but otherwise had an amphibian anatomy, especially pertaining to its wrists and other, more widely accepted candidate is Hylonomus, which lived about 35 million.   Jian-Fang Gao, Yan-Fu Qu, Lai-Gao Luo, and Xiang Ji "Evolution of Reptilian Viviparity: A Test of the Maternal Manipulation Hypothesis in a Temperate Snake, Gloydius brevicaudus (Viperidae)," Zoological Science 27(3), , (1 March ).Cited by:


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Distribution and evolution of viviparity in reptiles by Donald W. Tinkle Download PDF EPUB FB2

DISTRIBUTION AND EVOLUTION OF VIVIPARITY IN REPTILES 3 between high latitudes, high altitudes and viviparity but suggested several other interesting correlations (as did Mell, ) which will be discussed later.

While the authors cited above primarily call attention. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Viviparity has originated on over times among animals and is found among bony fishes, cartilaginous fishes, amphibians, mammals, and squamate reptiles, as well as in several invertebrate : Daniel Blackburn.

This item appears in the following Collection(s) Zoology, University of Michigan Museum of (UMMZ)Cited by: The evolution of viviparity has been of considerable interest for over years because of the high frequency of occurrence coupled with a complete absence of viviparity in other reptiles. In order for viviparity to fully evolve, viviparous species must overcome three major morphological and/or physiological by: 4.

Viviparity in squamate reptiles is widely recognized as having evolved convergently from oviparity more than times. However, questions persist as to whether reversals from viviparity back to Author: Daniel Blackburn.

Viviparity has evolved many times within squamate reptiles, mostly in cool climates, but the selective advantages of uterine retention of eggs remain obscure. Previous analyses have assumed that intrauterine incubation enhances offspring survival because of early hatching or protection of the young in utero.

I suggest instead that prolonged uterine retention directly enhances hatchling Cited by:   Viviparity in squamate reptiles is widely recognized as having evolved convergently from oviparity more than times.

However, questions persist as to whether reversals from viviparity back to oviparity have ever by: Abstract. Viviparity has evolved independently at least 95 times in squamates, and in some cases more than once within a single genus.

This high frequency of evolutionary origins means that there may be a wide diversity of physiological adaptations to live-bearing in Cited by: 6. Oviparity, or egg-laying, is the dominant mode of reproduction among vertebrates.

Nevertheless, viviparity, the retention of the egg within the reproductive tract until embryonic development is complete, characterizes almost all mammals; it has also had at least independent origins within the fishes, amphibians, and reptiles (ShineBlackburnWourms and Lombardi ).Cited by: Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology.

Because some reptiles are more closely related to birds than they are to other reptiles (e.g., crocodiles Clade: Sauropsida. Evolution of Reptiles. Reptiles originated approximately million years ago during the Carboniferous period.

One of the oldest-known amniotes is Casineria, which had both amphibian and reptilian characteristics. One of the earliest undisputed reptiles was Hylonomus. Soon after the first amniotes appeared, they diverged into three groups.

The evolution of viviparity is a key life-history transition in vertebrates, but the selective forces favoring its evolution are not fully understood.

With > origins of viviparity, squamate reptiles (lizards and snakes) are ideal for addressing this issue. Although most species are oviparous, viviparity exists in some amphibians, especially caecilians, but the greatest number of independent origins of viviparity exists in squamate reptiles.

Parental care occurs in many species, varies considerably among species, and is extended in some. The evolution of parental care is discussed in detail. Most reptiles are oviparous (egg-laying), but viviparity (live-bearing) has evolved about times in lizards and snakes.

Geographic biases in the distribution of viviparous species stimulated the “cold-climate hypothesis,” proposed independently by three field-based researchers in the early s.

Mell (in China) and Weekes (in Australia) viewed viviparity as a mechanism for thermal Cited by: Viviparity, retention and growth of the fertilized egg within the maternal body until the young animal, as a larva or newborn, is capable of independent growing embryo derives continuous nourishment from the mother, usually through a placenta or similar structure.

This is the case in most mammals, many reptiles, and a few lower organisms. 2. Evolution of viviparity and the placenta. The placenta is defined as an organ of physiological exchange between the mother and fetus [].The placenta is probably the most varied structure in the animal kingdom, and is found in a wide variety of taxa, even among invertebrates such as scorpions and lower vertebrates such as selachian sharks [4,5].Cited by:   Squamate reptiles (lizards and snakes) offer a unique model system for testing hypotheses about the evolutionary transition from oviparity (egg-laying) to viviparity (live-bearing) in amniote vertebrates.

The evolution of squamate viviparity has occurred remarkably frequently (> times) and has resulted in major changes in reproductive by: The evolution of viviparity (live bearing) from oviparity (egg laying) in squamate reptiles offers unique advantages in this respect.

First, at least separate lineages of lizards and snakes have undergone this transition, offering immense potential for comparative study (Blackburn,; Shine ; Lee and Shine ; Shine and.

evolution of viviparity in quantitative, func-tional, and historical terms. Herein, I drawn upon the phylogenetic ap-proaches that clarify the evolution of viviparity in amniotes –specifically mammals and squa-mate reptiles.

As discussed herein, squamates (lizards and snakes) are ideal for studies on vivi. Evolution of Reptiles. Reptiles originated approximately million years ago during the Carboniferous period. One of the oldest-known amniotes is Casineria, which had both amphibian and reptilian of the earliest undisputed reptiles was after the first amniotes appeared, they diverged into three groups (synapsids, anapsids, and diapsids) during the .SQUAMATE REPTILES AS MODEL ORGANISMS FOR THE EVOLUTION OF VIVIPARITY DANIEL G.

BLACKBURN Department of Biology, Life Sciences Center, Trinity College, Hartford, CTUSA ABSTRACT: For over a century, research has been conducted on squamates in order to reveal how viviparity has evolved in mammals and other vertebrates.Reptiles arose about – million years ago during the Carboniferous period.

Reptiles, in the traditional sense of the term, are defined as animals that have scales or scutes, lay land-based hard-shelled eggs, and possess ectothermic metabolisms. So defined, the group is paraphyletic, excluding endothermic animals like birds and mammals that are descended from early reptiles.