Sökning: "ichthyosaurs"

Hittade 4 uppsatser innehållade ordet ichthyosaurs.

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. Testing the Cretaceous Diversity of Ichthyosaurs and Their Extinction Hypotheses Using a Quantitative Approach

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Naz Acikkol; [2015]
   Nyckelord :diversity; ichthyosaurs; extinction; belemnites; ammonites; prey; predator; rock record; sampling bias; Cretaceous; mångfald; utdöende; fisködlor; belemniter; rovdjur; byte;

   Sammanfattning : As portrayed in Before the Dinosaur: the Historical Significance of the Fossil Marine Reptiles, ichthyosaurs, as other Mesozoic marine amniotes, have been unfairly overshadowed by dinosaurs in both popular culture and the field of vertebrate palaeontology. Yet by the effort of dedicated researchers, work on these fish-like marine reptiles had never died out, and in fact a second wave of interest emerged in the late 20th century. LÄS MER

4. 3. Long bone and vertebral microanatomy and osteo-histology of ’Platecarpus’ ptychodon (Reptilia, Mosasauridae) : implications for marine adaptations

   Kandidat-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Miriam Heingård; [2014]
   Nyckelord :benhistologi; mikroanatomi; mosasaurier; akvatisk anpassning; tillväxthastighet; bone histology; bone microanatomy; mosasaurs; aquatic adaptations; growth rate; Earth and Environmental Sciences;

   Sammanfattning : The inner bone architecture and histology provide information about life history traits of extant as well as extinct animals. Mosasaurs (family Mosasauridae) are a group of secondarily adapted marine squamates that radiated in the Late Cretaceous, resulting in the evolution of a body plan adapted for pelagic habitats. LÄS MER

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

   Kandidat-uppsats, Lunds universitet/Geologiska institutionen

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

   Sammanfattning : 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. LÄS MER