Essays about: "Tetrapoder"

Found 3 essays containing the word Tetrapoder.

  1. 1. Palaeoenvironments of the Earliest (Middle Devonian) Tetrapod Trackways from the Holy Cross Mountains, Poland; Locomotion in a Terrestrial Setting?

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Martin Qvarnström; [2015]
    Keywords : Tetrapods; palaeoenvironment; trackways; paleosols; microfacies; trace fossils; fin-limb transition; Holy Cross Mountains.;

    Abstract : The palaeoenvironment from which early tetrapods emerged is crucial to comprehend in order to understand the mechanisms that drove and allowed the terrestrialization of vertebrates; one of the most important evolutionary ‘events’ in the history of animals. Nevertheless, much of the terrestrialization is shrouded in obscurity, inter alia, due to scarcity of early tetrapods in the fossil record. READ MORE

  3. 2. Dental histology of Cretaceous mosasaurs (Reptilia, Squamata) : incremental growth lines in dentine and implications for tooth replacement

    University essay from Lunds universitet/Geologiska institutionen

    Author : Johan Gren; [2011]
    Keywords : dental histology; mosasaurs; Cretaceous tetrapods; incremental lines; von Ebner; Andresen; tooth replacement; tandhistologi; mosasaurier; kretaceiska tetrapoder; tillväxtlinjer; tandersättning; Earth and Environmental Sciences;

    Abstract : The dentine of teeth from five genera of mosasaurs [i.e., Clidastes, Halisaurus, Dollosaurus (Prognathodon),cf. Platecarpus, and Tylosaurus] and a Mesozoic crocodylian (Aigialosuchus) from the Campanian of the Kristianstad Basin, southernmost Sweden, displays two types of incremental growth lines; i. READ MORE

  4. 3. Osteo-histology of Mesozoic marine tetrapods : implications for longevity, growth strategies and growth rates

    University essay from Lunds universitet/Geologiska institutionen

    Author : Johan Gren; [2010]
    Keywords : histologi; mesozoiska tetrapoder; livslängd; tillväxtstrategier; osteoporos; pachyosteosclerosis; histology; Mesozoic tetrapods; longevity; growth strategies; osteoporosis; Earth and Environmental Sciences;

    Abstract : Osteo-histology provides information on age, growth strategies, and lifestyles of both recent and ancient animals. This study deals with the histology of fossilized bone from three groups of tetrapods – sea turtles, ichthyosaurs and plesiosaurs – all secondarily adapted to marine life, but with rather different bone microstructures. READ MORE