Search for dissertations about: "Devonian"

Showing result 1 - 5 of 25 swedish dissertations containing the word Devonian.

  2. 1. Morphology, Taxonomy and Interrelationships of Tristichopterid Fishes (Sarcopterygii, Tetrapodomorpha)

    Author : Daniel Snitting; Per Erik Ahlberg; Graham Budd; Henning Blom; Zerina Johanson; Uppsala universitet; []
    Keywords : Organismic biology; Sarcopterygii; Tetrapodomorpha; Tristichopteridae; biogeography; phylogeny; Computed Tomography; Devonian; Organismbiologi;

    Abstract : Tristichopterids (Sarcopterygii, Tetrapodomorpha) form a monophyletic group of exclusively Devonian fishes. This thesis consists of descriptions of new material of tristichopterids and closely related taxa, as well as new interpretations and descriptions of previously figured material. READ MORE

  4. 2. Silurian-Devonian vertebrates from the Northern hemisphere

    Author : Henning Blom; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

    Abstract : Microscopic remains of early vertebrates such as scales and dermal hone fragments are common in Silurian andDevonian rocks world wide. Although they only represent a small part of the whole animal they still provideimportant information about the organism and its evolution, ecology and distribution. READ MORE

  5. 3. Vertebrate remains from the Upper Silurian-Lower Devonian of North Greenland

    Author : Henning Blom; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi;

    Abstract : .... READ MORE

  6. 4. The Arthropod Assemblage of the Upper Devonian Strud locality and its Ecology

    Author : Linda Lagebro; Graham E. Budd; Gregory D. Edgecombe; John S. Peel; Gerhard Scholtz; Uppsala universitet; []
    Keywords : Branchiopoda; Hexapoda; Eurypterida; Strud; Famennian; ephemeral pool; Earth Science with specialization in Historical Geology and Palaeontology; Geovetenskap med inriktning mot historisk geologi och paleontologi;

    Abstract : The Devonian (419-359 million years ago) is the geological period when the terrestrial biota fully established. Early representatives from a terrestrial and continental aquatic biota have previously been reported from the Upper Devonian (Famennian) Strud quarry in Belgium, in the shape of seed-bearing plants and vertebrates (fish and early tetrapods). READ MORE

  7. 5. The braincase of Youngolepis, a Lower Devonian crossopterygian from Yunnan, south-western China

    Author : Mee-mann Chang; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fiskar; Paleozoologi;

    Abstract : The endocranium and skull roof of Youngolepis, a Lower Devonian crossopterygian from south-western China, is described based on some 40 specimens of which one was investigated by serial grinding. In cranial structure Youngolepis Chang et Yu, 1981, shows affinity to Powichthys Jessen, 1975, from the Lower Devonian of the Canadian Arctic. READ MORE