Avancerad sökning

Hittade 3 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Embryologi och tidig ontogeni hos mesozoiska fisködlor (Ichthyopterygia)

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Susanna Perneby Molin; [2016]
    Nyckelord :fisködlor; embryo; ontogeni; jura; Holzmaden; Earth and Environmental Sciences;

    Sammanfattning : Ichthyosaurs (‘fish lizards’) are a group of marine reptiles that lived during the Mesozoic Era. They are all included in the superorder Ichthyopterygia, which consists of at least 36 genera and 80 species. LÄS MER

  3. 2. A Phylogenetic Appraisal of Pachycormus bollensis: Implications for Pachycormiform Evolution

    Kandidat-uppsats, Institutionen för geovetenskaper

    Författare :Maria Lindkvist; [2012]
    Nyckelord :Pachycormus bollensis; pachycormiformes; parsimony analysis; Bayesian analysis; Holzmaden;

    Sammanfattning : The Pachycormiformes were a successful group of stem-teleosts. Although they persisted for more than 100 million years in the Mesozoic seas and occupied a significant space of the ecosystem, little is known about this most diverse group. One of the earliest pachycormiformes is the lower Jurassic Pachycormus bollensis. LÄS MER

  4. 3. Morphological and functional differences between rhamphorhynchoid and pterodactyloid pterosaurs with emphasis on flight

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Elisabeth Einarsson; [2004]
    Nyckelord :pterosaurs; Rhamphorhynchoidea; Pterodactyloidea; morphology; wings; flight; aerodynamics; air sacs; flygödlor; morfologi; vingar; flygning; aerodynamik; luftsäckar; Earth and Environmental Sciences;

    Sammanfattning : To explain how the morphological differences between Rhamphorhynchoidea and Pterodactyloidea affect flight performances and life styles wings and claws of pterosaur fossils from collections in Uppsala and Munich have been measured. The measured specimens are from Jurassic limestones and shales in Solnhofen, Eichstätt and Holzmaden and include Dorygnathus, Campylognathoides, Rhamphorhynchus, Anurognathus, Pterodactylus, Germanodactylus and Gallodactylus. LÄS MER