Download or read book Illustrations and Descriptions of New Unfigured Or Imperfectly Known Shells Chiefly American in the U S National Museum written by William Healey Dall and published by . This book was released on 1902 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey of the Benthic Invertebrate Fauna of the Eastern Bering Sea written by Patsy A. McLaughlin and published by . This book was released on 1963 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Scientific Report written by and published by . This book was released on 1962 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter Water Temperatures and an Annotated List of Fishes written by Robert L. Edwards and published by . This book was released on 1961 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cruise no. 126 of the Albatross III was planned and conducted to gather information about the distribution of fishes across the Continental Shelf from Nantucket Shoals to Cape Hatteras during the late winter period when water temperatures generally are at their minimum. The shelf here has a general hydrographic similarity from north to south, well described by Bigelow (1933), that makes it a particularly worthwhile area in which to study the relation of fish distribution to water temperature, depth, and other factors of the environment. Since the fish of this portion of the shelf support several different, relatively important food and industrial fisheries, as well as an intensive marine sport fishery. Cruise no. 126 served to provide data valuable to several research programs.
Download or read book Biology of the Pacific Ocean Zenkevoch L A The deep sea bottom fauna Pleuston written by and published by . This book was released on 1969 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bivalve Seashells of Western North America Marine Bivalve Mollusks from Arctic Alaska to Baja California written by Eugene V. Coan and published by Paul Valentich-Scott. This book was released on 2000-05-10 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: The culmination of a ten-year study, Bivalve Seashells of Western North America treats all bivalve mollusks living from northern Baja California, Mexico to Arctic Alaska. A total of 472 species are described and illustrated with detailed photographs and drawings. All habitats in the region are included from the intertidal splash zone to the abyssal depths of the ocean basins. The book has over 4,800 complete bibliographic references to the bivalves, including citations on the biology, physiology, ecology, and taxonomy of this commercially and biologically important group. Character tables and dichotomous keys assist the reader in identification. Also included in the 764 page book is an illustrated key to the superfamiles of the region, and a complete glossary.
Download or read book Proceedings of the United States National Museum written by United States National Museum and published by . This book was released on 1902 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Superfamily Mactroidea Mollusca Bivalvia in American Waters written by Javier H. Signorelli and published by Springer Nature. This book was released on 2019-11-04 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book identifies all valid species belonging to the superfamily Mactroidea living in American waters, distributed across fourteen biogeographical provinces. It also provides an updated classification of the widely occurring Mactroidea superfamily, which comprises eight subfamilies grouped into four families: Mactridae (Lamarck, 1809); Anatinellidae (Deshayes, J.Gray 1853); Cardiliidae (Fischer, 1887) and Mesodesmatidae (J. Gray, 1840). The species included in this superfamily are known to have existed in North America since the Early Cretaceous.
Download or read book Report of the National Museum written by United States National Museum and published by . This book was released on 1904 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of The Academy of Natural Sciences Vol 140 1988 written by and published by Academy of Natural Sciences. This book was released on with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the United States National Museum written by United States National Museum and published by . This book was released on 1960 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1962 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mollusca written by A. M. Scheltema and published by CSIRO PUBLISHING. This book was released on 2001 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Antarctic and Subantarctic Brachiopods written by Merrill W. Foster and published by American Geophysical Union. This book was released on 1974 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Brachiopod Morphology and Genera written by James Allan Thomson and published by . This book was released on 1927 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1938 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower Pliocene Mollusks and Echinoids from the Los Angeles Basin California and Their Inferred Environment written by Wendell Phillips Woodring and published by . This book was released on 1938 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
