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 Brachiopod Morphology and Genera recent and Tertiary c written by John Arthur Thomson and published by . This book was released on 1927 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morphology Classification and Life Habits of the Productoidea Brachiopoda written by Helen Marguerite Muir-Wood and published by Geological Society of America. This book was released on 1960 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terminology; Preparation of specimens; Range and distribution of the productoidea; External mophology of the productoidea; Internal morphology of the productoidea; Life habits of the productoidea; Origin of the productoidea; Classification of the productoidea; Systematic descriptions.
Download or read book Brachiopods written by Howard Brunton and published by CRC Press. This book was released on 2001-11-29 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Brachiopod Morphology written by Sydney Savory Buckman and published by . This book was released on 1907 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morphometric Evolution of Paleozoic Brachiopods written by Rituparna Bose and published by . This book was released on 2011 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atrypida (Brachiopoda, Rhynchonellata) are ancient marine invertebrate fossils that are well preserved, abundant and diverse in the mid-Paleozoic (ecological evolutionary unit (EEU) P3). Atrypides thus serve as useful tools for morphological shape study. While qualitative studies have been performed for solving problems in brachiopod taxonomy, phylogeny, evolution and ecology, quantitative studies have been lacking. After qualitative taxonomic identifications, morphological shape of the Silurian-Devonian Eastern North American atrypids was analyzed using geometric morphometrics, placing the results in evolutionary and ecological perspectives. Landmark analysis was performed on dorsal valves, ventral valves, anterior and posterior regions. These data were used for comparison with morphological distances, calculated as pairwise Procrustes distances. Evolutionary divergence times were determined from atrypide phylogeny and from stratigraphic zonations in the Michigan Traverse Group. Maximum likelihood tests were performed to determine evolutionary rates and modes of morphological divergence within and between genera. Episkeletobionts on hosts were examined to determine how morphological variation affected these assemblages. Morphometric results suggest that morphological distances within each genus was as large as those observed between genera. Thus, referring individuals to a particular genus, based on shell shape alone is challenging. Diversifying selection has been acting on morphological divergence of these generic pairs and morphometric distances are consistent with the prior phylogenetic arrangement. Short term changes observed in individual lineages, that gets averaged out in time when compared to other genera, together with considerable morphological overlap observed between genera in P3 EEU, suggests a pattern consistent with stasis, as expected in EEUs. The Traverse Group atrypid species lineage, which represents a 5 m.y. time span, exhibited lightly constrained morphological evolution, reflecting a stasis-like pattern. Greater encrustation preferences on one of two morphotypes on the dorsal valve and posterior region, suggest greater surface area facilitated by relatively deeper profile hosts in their reclining life orientation. Overall, the integration of various paleontological datasets reveal that the seemingly homogenous group of atrypide brachiopods exhibit subtle but significant evolution in their shell shape that is correlated with several kinds of ecological differences.
Download or read book Functional Morphology of Brachiopods written by Shou Hwa Chuang and published by . This book was released on 2016-08-12 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes the morphology and the functions of the various organ systems of the brachiopods, covering recent lingulids, discinids, craniids, rhynchonellids, terebratulids and terebratellids. It includes the relevant previous publications on the subject and the author's unpublished original observations. Of interest is his illustration of separate periostracum-forming epithelium and skeleton-forming epithelium at the periostracal groove or crypt in Lingula postlarva and Discinisca shelled larva. This serves as an alternative to the interpretation of Williams and Wright (1970) that there was a single epithelium, every individual cell of which moved from the periostracal groove or crypt to the mantle edge like a roller belt and secreted in succession pellicle, periostracum and when it went over the mantle edge, the cell secreted primary layer and finally secondary layer of the skeleton. The author next shows that in the earliest Lingula anatina larva and Discinisca coralliphila shelled larva there was no cuticle connection between the dorsal and the ventral valves, disputing Yatsu's (1902) notion that Lingula valves originated by the bending of a single circular shell. The author's illustration also shows that the intestine and anus of L. anatina larva are present at the 2 p.c. stage after it hatches, disputing Yatsu's (1902) claim that they formed during the 4 p.c. stage. The author also illustrates a rare 10 p.c. L. anatina larva from the Johor Strait with longitudinally divided median tentacle, disproving Yatsu's (1902) notion that the median tentacle atrophied after larval settlement. The author illustrates the differentiation of haemerythrocytes and spindle cells from the mesothelium in the mesothelial ridges of the roof and the floor of the perivisceral cavity, establishing that the spindle cells are a normal constituent of the coelomic fluid and disproving the notion that spindle cells differentiated from muscles fibres. The author spent much time in China, sorting, examining and photographing the exceptionally preserved Lower Cambrian Chengjiang fossils in the various institutions. His revision of the published accounts of them by Chinese palaeontologists and his revision of recent inarticulate brachiopods are presented. It is hoped that his observations and conclusions can earn general acceptance.
Download or read book Invertebrate Palaeontology and Evolution written by E. N. K. Clarkson and published by John Wiley & Sons. This book was released on 2013-07-23 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invertebrate Palaeontology and Evolution is well establishedas the foremost palaeontology text at the undergraduate level. Thisfully revised fourth edition includes a complete update of thesections on evolution and the fossil record, and the evolution ofthe early metazoans. New work on the classification of the major phyla (inparticular brachiopods and molluscs) has been incorporated. The section on trace fossils is extensively rewritten. The author has taken care to involve specialists in the majorgroups, to ensure the taxonomy is as up-to-date and accurate aspossible.
Download or read book Brachiopods written by Paul Copper and published by Routledge. This book was released on 2018-02-02 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of conference papers presents information on the molecular genetics, biomineralization, growth and ecology of extant brachiopod stocks (extrapolated back to the Cambrian), and the shell microstructure, taphonomy, paleogeography, evolution, and taxonomy of fossil brachiopods.
Download or read book Brachiopod Morphology in Relation to Environment written by Archie Lamont and published by . This book was released on 1934 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morphologic Studies of the Brachiopod Genus Composita written by George William Andrews and published by . This book was released on 1953 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Synopsis of American Fossil Brachiopoda Including Bibliography and Synonymy written by Charles Schuchert and published by . This book was released on 1895 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brachiopods Through Time written by D. I. MacKinnon and published by CRC Press. This book was released on 1991-06-01 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Morphometric Approach to Competition in Ordovician Brachiopods written by Carrie L. Tyler and published by . This book was released on 2007 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lessons in Immunity written by Loriano Ballarin and published by Academic Press. This book was released on 2016-04-08 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lessons in Immunity: From Single-cell Organisms to Mammals stems from the activity of the Italian Association of Developmental and Comparative Immunobiology (IADCI), represented by the editors. This book is presented as a series of short overviews that report on the current state of various relevant fields of immunobiology from an evolutionary perspective. The overviews are written by authors directly involved in the research, and most are members of the IADCI or have otherwise been involved in the related research for their respective overview. This publication offers scientists and teachers an easy and updated reference tool. Provides simple and updated reviews on the immunobiology of a wide spectrum of organisms, considered in an evolutionary context Focuses on both cells and humoral components of a variety of non-classical model organisms Offers in a single volume many contributions which can help with understanding the evolution of immune responses and the main adaptations in animal phyla Presents a valuable holistic cross-sectional approach for teaching immunology and its applications
Download or read book Studies in Fossil Brachiopod Morphology written by Kazys Jurgis Kemežys and published by . This book was released on 1967 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chonetoidean Brachiopods written by Patrick R. Racheboeuf and published by U.F.R. Des Sciences de La Terre Universite Claude-Bernard--L. This book was released on 1998 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
