Preliminary Descriptions Of New Brachiopoda From The Trenton And Hudson River Groups Of Minnesota PDF Download
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Author: Newton Horace Winchell Publisher: Legare Street Press ISBN: 9781020460920 Category : Languages : en Pages : 0
Book Description
This scientific text describes several new species of brachiopods discovered in the Trenton and Hudson River Groups of Minnesota. The authors, Charles Schuchert and Newton Horace Winchell, provide detailed descriptions of the specimens, including information on their morphology, distribution, and ecology. A must-read for anyone interested in the study of invertebrate zoology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Newton Horace Winchell Publisher: Legare Street Press ISBN: 9781020460920 Category : Languages : en Pages : 0
Book Description
This scientific text describes several new species of brachiopods discovered in the Trenton and Hudson River Groups of Minnesota. The authors, Charles Schuchert and Newton Horace Winchell, provide detailed descriptions of the specimens, including information on their morphology, distribution, and ecology. A must-read for anyone interested in the study of invertebrate zoology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Merrill W. Foster Publisher: American Geophysical Union ISBN: 0875901220 Category : Science Languages : en Pages : 192
Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 21. The Recent brachiopod faunas from southernmost South America, Antarctica, and the Subantarctic consisting of 21 genera and 37 species are described from new material. New taxa include the genera Manithyris and Bathynanus. Also new are 11 species: Compsothyris ballenyi, Hispanirhynchia? chiliensis, Manithyris rossi, Liothyrella multiporosa, Liothyrella scotti, Bathynanus tenuicostatus, Eucalathis macrorhynchus, Amphithyris hallettensis, Dallina eltanini, Fallax antarcticus, and Magellania? spinosa. Factor analysis was used to study relationships among morphological characters and environmental parameters. In Liothyrella, negative associations were found between beak height and water depth. The size of the pedicle opening within this genus is associated with the width of the hinge plate and the loop; apparently, these associations are related to increased dorsal adjustor muscle size with increased pedicle size. Similar relationships are found in the terebratellids, although here all of the characters are also negatively associated with water depth. Characters negatively associated with water depth may relate to the differing current strength at various depths. Puncta density is positively correlated with water temperature. Examples of brachiopod variation are discussed. Synonyms have resulted from former failure to study large samples and to appreciate the extent of brachiopod variation. A priori valuation of certain characters as being specific is unwarranted, since sibling species may be more similar than different subspecies of the same species. Many Recent and fossil brachiopod genera are too narrow in definition owing to oversplitting or to a narrow conception of monophyly. I advocate somewhat broader and more practical genera for obtaining the maximal information value from such taxa. Brachiopods, contrary to popular belief, are an abundant and viable group in the southern hemisphere faunas. Most brachiopods in the Ross Sea appear to have definite niches and habitats but may overlap geographically where population densities are low. Brachiopods here can be divided roughly into a slope and a shelf assemblage. The greatest species diversity occurs at the seaward edge of the Ross Sea shelf, interpreted as an ecotone effect where two different water types meet. Only South America and Antarctica appear to have or have had direct communication between some elements of their brachiopod faunas. Other similarities between separate southern continents are related to retention of common pre-Cenozoic elements or to chance dispersal of larvae across barriers. Events related to cooling during the late Pliocene or Pleistocene caused reduction of puncta density, shell thickness, and spiculation in the Recent fauna and apparently influenced the present species structure, at least in Liothyrella uva, Gyrothyris mawsoni, and Macandrevia.
Author: Howard Brunton Publisher: CRC Press ISBN: 9780203210437 Category : Nature Languages : en Pages : 466
Book Description
The growth history of a brachiopod is entombed in its shell, but research on fossil and living brachiopods has generated unanswered questions about these marine invertebrates. Several contributors to Brachiopods Past and Present comment on their differing structures and morphological detail. They use these as examples of ontogenetic and evolutionar
Author: Arthur James Boucot Publisher: ISBN: Category : Brachiopoda, Fossil Languages : en Pages : 56
Book Description
Additional title page description: Lithofacies summary and paleogeography of Bois Blanc correlatives in eastern North America and description of silicified brachiopods from New York.
Author: Charles Schuchert Publisher: ISBN: 9781332000876 Category : Science Languages : en Pages : 482
Book Description
Excerpt from A Synopsis of American Fossil Brachiopoda Including Bibliography and Synonymy A Synopsis of American Fossil Brachiopoda Including Bibliography and Synonymy was written by Charles Schuchert in 1897. This is a 475 page book, containing 195689 words and 11 pictures. Search Inside is enabled for this title. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Patrick R. Racheboeuf Publisher: U.F.R. Des Sciences de La Terre Universite Claude-Bernard--L ISBN: Category : Nature Languages : en Pages : 186
Author: Newton Horace Winchell
Author: Newton Horace Winchell
Author: Charles Doolittle Walcott
Author: Charles Doolittle Walcott
Author: James Allan Thomson
Author: Merrill W. Foster
Author: Howard Brunton
Author: Arthur James Boucot
Author: Charles Schuchert
Author: Gustav Arthur Cooper
Author: Patrick R. Racheboeuf