Author: Raymond Cecil MoorePublisher:
ISBN:
Category : Crinoidea
Languages : en
Pages : 196
Book Description
Morphological Features of Crinoid Columns
Author: Raymond Cecil MoorePublisher:
ISBN:
Category : Crinoidea
Languages : en
Pages : 196
Book Description
Echinodermata
Author: Raymond Cecil MooreFossil Crinoids
Author: Hans HessPublisher: Cambridge University Press
ISBN: 9780521524407
Category : Nature
Languages : en
Pages : 310
Book Description
Crinoids have graced the oceans for more than 500 million years. Among the most attractive fossils, crinoids had a key role in the ecology of marine communities through much of the fossil record, and their remains are prominent rock forming constituents of many limestones. This is the first comprehensive volume to bring together their form and function, classification, evolutionary history, occurrence, preservation and ecology. The main part of the book is devoted to assemblages of intact fossil crinoids, which are described in their geological setting in twenty-three chapters ranging from the Ordovician to the Tertiary. The final chapter deals with living sea lilies and feather stars. The volume is exquisitely illustrated with abundant photographs and line drawings of crinoids from sites around the world. This authoritative account recreates a fascinating picture of fossil crinoids for paleontologists, geologists, evolutionary and marine biologists, ecologists and amateur fossil collectors.
Encyclopedia of Geology
Author: Publisher: Academic Press
ISBN: 0081029098
Category : Science
Languages : en
Pages : 5634
Book Description
Encyclopedia of Geology, Second Edition presents in six volumes state-of-the-art reviews on the various aspects of geologic research, all of which have moved on considerably since the writing of the first edition. New areas of discussion include extinctions, origins of life, plate tectonics and its influence on faunal provinces, new types of mineral and hydrocarbon deposits, new methods of dating rocks, and geological processes. Users will find this to be a fundamental resource for teachers and students of geology, as well as researchers and non-geology professionals seeking up-to-date reviews of geologic research. Provides a comprehensive and accessible one-stop shop for information on the subject of geology, explaining methodologies and technical jargon used in the field Highlights connections between geology and other physical and biological sciences, tackling research problems that span multiple fields Fills a critical gap of information in a field that has seen significant progress in past years Presents an ideal reference for a wide range of scientists in earth and environmental areas of study
Bibliography and Index of Paleozoic Crinoids, 1942-1968
Author: Gary D. WebsterPublisher: Geological Society of America
ISBN: 0813711371
Category : Crinoidea, Fossil
Languages : en
Pages : 361
Book Description
A Re-evaluation of Crinoid Morphology and Proposed Relationship of Crown Groups, with Insights from Biogeography
Author: Kyle Richard WomackPublisher:
ISBN:
Category :
Languages : en
Pages : 192
Book Description
Crinoids are the most primitive living members of the Phylum Echinodermata. Though still present in reduced numbers today, crinoids were the dominant echinoderms from the Ordovician to the Permian. The crinoid body plan consists of three major regions, the column, the calyx, and the arms. Each region serves important functions in crinoids. The column raises the rest of the body into the water column for more efficient feeding. The calyx contains the visceral mass and mouth. Arms extend out from the top of the calyx to trap microorgansisms and suspended organic particles in the water column. A re-evaluation of these functional units is undertaken to understand the importance of various structures and to obtain discrete characters for use in a cladistic analysis. The relationship of crinoid crown groups has been an active area of research for the past couple of decades. With each proposed phylogenetic relationship, a new interpretation of thecal plate homology has been proposed. Here each study is re-examined in the light of new data. A review of functional morphology indicates a dual-reference system to be the most supported interpretation of plate homology. The two reference points in this system are the stem-cup and the cup-arm junctions, at the top and bottom of the calyx. The difference between a two-circlet and three-circlet crinoid is the presence or absence of the middle (basal) circlet. A new cladistic analysis is presented, with the topology of trees obtained giving support for the retention of Paleozoic crinoid stem and crown groups. Crinoids appear abruptly in the fossil record. Questions pertaining to origins and ancestral stock abound. A biogeography study is employed to look at the distribution of crinoids from the Early to Middle Ordovician. Locality information, combined with an understanding of the movement of major plates, paleoclimate data, an understanding of larval distribution, and a review of similar studies carried out on different taxa, gives insight into possible radiation and dispersal patterns of crinoids from the first half of the Ordovician.
Index of the Journal of Paleontology
Author: Richard D. HoarePublisher: Popular Press
ISBN: 9780879721466
Category : Science
Languages : en
Pages : 164
Book Description
This is an index of Vols. 26-50 of the Journal of Paleontology.
Geological Survey Bulletin
Author: University of Kansas Paleontological Contributions
Author: University of Kansas Paleontological Contributions
Author: University of KansasPublisher:
ISBN:
Category : Paleontology
Languages : en
Pages : 940
Book Description