Sökning: "Devonian"
Visar resultat 1 - 5 av 26 avhandlingar innehållade ordet Devonian.
1. Morphology, Taxonomy and Interrelationships of Tristichopterid Fishes (Sarcopterygii, Tetrapodomorpha)
Sammanfattning : 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. LÄS MER
2. Silurian-Devonian vertebrates from the Northern hemisphere
Sammanfattning : 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. LÄS MER
3. Vertebrate remains from the Upper Silurian-Lower Devonian of North Greenland
Sammanfattning : .... LÄS MER
4. The Arthropod Assemblage of the Upper Devonian Strud locality and its Ecology
Sammanfattning : 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). LÄS MER
5. The braincase of Youngolepis, a Lower Devonian crossopterygian from Yunnan, south-western China
Sammanfattning : 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. LÄS MER