Sökning: "Brachiopoda"

Hittade 5 avhandlingar innehållade ordet Brachiopoda.

  1. 1. Origin and Lifestyles of early Brachiopods and other Lophotrochozoans Insights from the Chengjiang and Guanshan Fossil-Lagerstätten

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Haizhou Wang; Lars E. Holmer; Zhifei Zhang; Michael Streng; David A.T. Harper; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Cambrian Explosion; Chengjiang; Guanshan; Lagerstätten; Lophotrochozoa; Brachiopoda; Earth Science with specialization in Historical Geology and Palaeontology; Geovetenskap med inriktning mot historisk geologi och paleontologi;

    Sammanfattning : One of the great unsolved evolutionary questions concerns the origin and phylogeny of the major animal phyla that appeared in the fossil record more than 540 million years ago, during the Cambrian explosion. Although new molecular information has been very useful, we still have little understanding about the origin of most of the phyla of bilaterians living today. LÄS MER

  2. 2. Exceptionally Preserved Cambrian Lophotrochozoa : Taxonomy, Systematics and Taphonomy of Chengjiang and Indian Springs Lophophorates

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Aodhán D. Butler; Michael Streng; Lars E. Holmer; Christian Skovsted; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Brachiopoda; Chengjiang; Lagerstätte; Cambrian Explosion; palaeobiology; stem-group; entoproct; phoronid; tommotiid; exceptional preservation.; Earth Science with specialization in Historical Geology and Palaeontology; Geovetenskap med inriktning mot historisk geologi och paleontologi;

    Sammanfattning : The origin and evolution of Lophotrochozoa can be traced to the plethora of lower Cambrian scleritome taxa.  We aim to determine the character suites linking these stem-Lophotrochozoa to their extant crown relatives, in particular the small shelly tommotiids and the stem-group brachiopods. LÄS MER

  3. 3. Ordovician (Billingen and Volkhov stages) Brachiopod Faunas of the East Baltic

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Eva Egerquist; Lars Holmer; John S. Peel; Michael G. Bassett; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Early Middle Ordovician; Billingen Regional Stage; Volkhov Regional Stage; Diversity; Brachiopoda; Conodonta; Ostracoda; Estonia; Russia; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : Lower-Middle Ordovician (Arenig) successions in the East Baltic have been investigated for more than one hundred and fifty years. Nevertheless detailed sampling still yields new species and better knowledge of the environment in which these organisms lived. LÄS MER

  4. 4. The Early Cambrian Fauna of North-East Greenland

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Christian B. Skovsted; Uppsala universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Early Cambrian; Dyeran; Botoman; Biostratigraphy; Palaeogeography; Small Shelly Fossils; Brachiopoda; Mollusca; Hyolitha; Trilobita; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : Small shelly fossils are common in sediments of Early Cambrian age and include the earliest common representatives of metazoan animals with mineralized hard parts. The group includes fossils of very different morphology, composition and ultrastructure. LÄS MER

  5. 5. Diversity and Life Habits of Silurian Strophomenide Brachiopods of Gotland

    Detta är en avhandling från Uppsala : Institutionen för geovetenskaper

    Författare :Ole Andreas Hoel; Uppsala universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Gotland; Silurian; brachiopod; functional morphology; ecology; Llandovery; Wenlock; Ludlow; Strophomenoidea; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : The Superfamily Strophomenoidea is a very diverse group of brachiopods in the Early Palaeozoic. In the Silurian succession on Gotland, they are among the most easily identifiable, and commonly found fossils. LÄS MER