{"product_id":"a-review-and-evaluation-of-homology-hypotheses-in-echinoderm-paleobiology-paperback-9781009397179","title":"A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology (Paperback) 9781009397179","description":"\u003cfont face=\"Georgia\"\u003e\r\n\u003cp\u003e\u003cfont size=\"6\"\u003eA Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology\u003c\/font\u003e\u003cbr\u003e\r\n\r\n\r\n\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThis Element summarizes decades of research concerning the homology hypotheses structures of Echinodermata.\u003c\/em\u003e\u003c\/p\u003e\r\n\r\n\r\n\u003cp\u003e\u003cfont size=\"4\"\u003eColin D. Sumrall (Author), Sarah L. Sheffield (Author), Jennifer E. Bauer (Author), Jeffrey R. Thompson (Author), Johnny A. Waters (Author)\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e9781009397179, Cambridge University Press\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003ePaperback, published 13 April 2023\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e75 pages\u003cbr\u003e22.9 x 15.2 x 0.3 cm, 0.103 kg\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\r\n\r\n\r\n\u003cp align=\"justify\"\u003e\u003cstrong\u003e\u003cfont size=\"3\"\u003eThe extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing it into axial regions generally associated with elements of the ambulacral system and extraxial regions that are not. UEH describes the detailed construction of the axial skeleton, dividing it into homologous plates and plate series based on symmetry, early growth, and function. These hypotheses are not in conflict; the latter is rooted in refinement of the former. Some interpretive differences arise because many of the morphologies described from eleutherozoan development are difficult to reconcile with Paleozoic forms. Conversely, many elements described for Paleozoic taxa by UEH, such as the peristomial border plates, are absent in eleutherozoans. This Element recommends these two hypotheses be used together to generate a better understanding of homology across Echinodermata.\u003c\/font\u003e\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e1. Introduction\u003cbr\u003e 2. Homology Hypotheses for Echinodermata\u003cbr\u003e 3. The Application of These Homology Hypotheses\u003cbr\u003e 4. Reconciling EAT and UEH\u003cbr\u003e 5. Future Areas of Study\u003cbr\u003e References.\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003eSubject Areas: Palaeontology [\u003ca title=\"See our other books on Palaeontology\" href=\"https:\/\/freshlyprintedbooks.co.uk\/search?q=%22Palaeontology%20%5BRBX%5D%22\"\u003eRBX\u003c\/a\u003e]\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\u003c\/font\u003e","brand":"Cambridge University Press","offers":[{"title":"Default Title","offer_id":46265435324696,"sku":"9781009397179","price":16.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/2037\/5320\/products\/9781009397179i.jpg?v=1692022870","url":"https:\/\/freshlyprintedbooks.co.uk\/products\/a-review-and-evaluation-of-homology-hypotheses-in-echinoderm-paleobiology-paperback-9781009397179","provider":"Freshly Printed Books","version":"1.0","type":"link"}