By Sarah L.Long, Howard Brunton, L. Robin M. Cocks, Sarah L Long
The expansion heritage of a brachiopod is entombed in its shell, yet learn on fossil and dwelling brachiopods has generated unanswered questions on those marine invertebrates. numerous individuals to Brachiopods prior and current touch upon their differing buildings and morphological aspect. They use those as examples of ontogenetic and evolutionary swap, as signs of taxonomic relationships, or to debate micro-structural shell morphology. inhabitants reviews of assorted species and up to date development in molecular phylogeny are provided. This unmarried compilation is a needs to for postgraduate scholars and researchers in evolution, zoology, geology, palaeontology and similar fields.
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Extra resources for Brachiopods Past and Present
In detail, however, unexpected ambiguities complicate relationships between the mineral and organic components, both within and among the shells of the three groups investigated. All rhynchonellate shells are structurally similar in two respects. They are composed of granules of calcite, ca. 15 nm in diameter, normally assembled with a rhombohedral motif into laminae of variable thickness. The laminae, which are essentially aggregates of granular monolayers, tend to have a crystallographic form, that is more or less aligned throughout the shell, irrespective of any organic inclusions.
Hiller, N. (1993) A modern analogue for the Lower Ordovician Obolus conglomerate in Estonia. Geological Magazine, 130, 265–267. S. (1996) Chemistry, microstructure, and diagenetic model of Jurassic dinosaur bones, Dinosaur National Monument, Utah. Journal of Sedimentary Research, 66, 531–547. D. (1989) Structural variations in natural F, OH and Cl apatites. American Mineralogist, 74, 870–876. Iijima, M. and Moriwaki, Y. (1990) Orientation of apatite and organic matrix in Lingula unguis shell. Calcified Tissue International, 47, 237–242.
1996) Chemistry, microstructure, and diagenetic model of Jurassic dinosaur bones, Dinosaur National Monument, Utah. Journal of Sedimentary Research, 66, 531–547. D. (1989) Structural variations in natural F, OH and Cl apatites. American Mineralogist, 74, 870–876. Iijima, M. and Moriwaki, Y. (1990) Orientation of apatite and organic matrix in Lingula unguis shell. Calcified Tissue International, 47, 237–242. Kuppfer, A. (1870) Über die chemische Konstitution der baltisch-silurischen Schichten. Archiv für Naturkunde Liv-, Est- und Kurlands, ser I, Bd.
Brachiopods Past and Present by Sarah L.Long, Howard Brunton, L. Robin M. Cocks, Sarah L Long