{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/23314"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/23314","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Morphometric approaches to systematics and microevolution: Applications from paleozoic bryozoa","abstract":"Documentation of microevolution through geologic time is a significant paleontologic contribution to evolutionary biology. Paleomicroevolutionary studies require accurate stratigraphic resolution over a large geographic area, through changing environments, over a sustained period of time, with an abundant, complex, eurytopic fossil group. The combination of cryptostome bryozoans, revised taxonomic procedures, multivariate morphometric methods, and advances in microcomputer technology allows for research of this nature.","abstract_html":"Documentation of microevolution through geologic time is a significant paleontologic contribution to evolutionary biology. Paleomicroevolutionary studies require accurate stratigraphic resolution over a large geographic area, through changing environments, over a sustained period of time, with an abundant, complex, eurytopic fossil group. The combination of cryptostome bryozoans, revised taxonomic procedures, multivariate morphometric methods, and advances in microcomputer technology allows for research of this nature.","abstract_has_math":false,"creators":["Hageman, Steven James"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Geology","degree_department":null,"school":null,"contributors":["Blake, Daniel B."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T14:09:46Z","date_published":"2011-05-07T14:09:46Z","updated_at":"2026-07-22T22:25:21Z","subjects":["Biology, Biostatistics","Paleontology"],"languages":["eng"],"rights":["Copyright 1992 Hageman, Steven James"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9305545","(UMI)AAI9305545"],"render_values":[{"text":"AAI9305545","href":null,"code":true},{"text":"(UMI)AAI9305545","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/23314","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Blake, Daniel B."]},{"key":"dc:creator","label":"Author","values":["Hageman, Steven James"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T14:09:46Z","10000-01-01","1992"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology, Biostatistics","Paleontology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1992 Hageman, Steven James"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9305545","(UMI)AAI9305545","http://hdl.handle.net/2142/23314"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Documentation of microevolution through geologic time is a significant paleontologic contribution to evolutionary biology. Paleomicroevolutionary studies require accurate stratigraphic resolution over a large geographic area, through changing environments, over a sustained period of time, with an abundant, complex, eurytopic fossil group. The combination of cryptostome bryozoans, revised taxonomic procedures, multivariate morphometric methods, and advances in microcomputer technology allows for research of this nature.","Multivariate analysis of a large morphometric data set demonstrates that discrete fenestrate bryozoan morphs can be recognized objectively at three hierarchical levels: species, genera and families. Recent studies of hard-part versus electrophoretic species recognition in cheilostome bryozoans and scleractinian corals support the interpretation that fenestrate species represent true biological species rather than morphotaxa. Morphometric analysis demonstrates that some characters are taxonomically more important than others, but use of all available characters yields the most reliable results.","Worthenopora is a Mississippian cryptostome bryozoan tentatively assigned to the order Cheilostomata (Jurassic and younger) but some early workers. This alignment raises the question of affinities between cryptostomes (class Stenolaemata) and cheilostomes (class Gymnolaemata). Based on wall structure, growth sequence, zooecial shape, and secondary structures such as stylets, Worthenopora is here shown to be a stenolaemate, assignable to the suborder Ptilodictyina with other bifoliate cryptostomes, with no special affinities with cheilostomes.","Paleontologic data frequently do not satisfy assumptions of normality and homoscedasticity of many parametric statistical tests. Normal scores tests, which employ normal order deviates (rankits), provide an attractive alternative for treatment of such data. Computer programs Rankit and Mathematica provide a practical method of calculating rankits and converting raw data, making normal scores tests more accessible.","Three-dimensional shapes of cryptostome bryozoan autozooecial chambers are important for systematics and paleoecologic interpretations, however, computer automation of three-dimensional reconstruction from serial sections is not yet practical.","Based on morphometric analysis of the rhabdomesoid Streblotrypa prisca, ecophenotypic and geographic variation are significant factors for microevolutionary studies. Apparently non-astogenetic morphologic growth gradients are demonstrated with colonies of S. prisca. A morphologic cline distributed over a 300 km transect is demonstrated; control is unclear, but it may be associated with a depth gradient.","Made available in DSpace on 2011-05-07T14:09:46Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9305545.pdf: 11404065 bytes, checksum: c7a23f66034d752ae4fa02257feb8676 (MD5) Previous issue date: 1992","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:03:38Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:30:20-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Morphometric approaches to systematics and microevolution: Applications from paleozoic bryozoa"]}]}],"canonical_facts":{"dc:contributor":["Blake, Daniel B."],"dc:creator":["Hageman, Steven James"],"dc:date":["2011-05-07T14:09:46Z","10000-01-01","1992"],"dc:description":["Documentation of microevolution through geologic time is a significant paleontologic contribution to evolutionary biology. Paleomicroevolutionary studies require accurate stratigraphic resolution over a large geographic area, through changing environments, over a sustained period of time, with an abundant, complex, eurytopic fossil group. The combination of cryptostome bryozoans, revised taxonomic procedures, multivariate morphometric methods, and advances in microcomputer technology allows for research of this nature.","Multivariate analysis of a large morphometric data set demonstrates that discrete fenestrate bryozoan morphs can be recognized objectively at three hierarchical levels: species, genera and families. Recent studies of hard-part versus electrophoretic species recognition in cheilostome bryozoans and scleractinian corals support the interpretation that fenestrate species represent true biological species rather than morphotaxa. Morphometric analysis demonstrates that some characters are taxonomically more important than others, but use of all available characters yields the most reliable results.","Worthenopora is a Mississippian cryptostome bryozoan tentatively assigned to the order Cheilostomata (Jurassic and younger) but some early workers. This alignment raises the question of affinities between cryptostomes (class Stenolaemata) and cheilostomes (class Gymnolaemata). Based on wall structure, growth sequence, zooecial shape, and secondary structures such as stylets, Worthenopora is here shown to be a stenolaemate, assignable to the suborder Ptilodictyina with other bifoliate cryptostomes, with no special affinities with cheilostomes.","Paleontologic data frequently do not satisfy assumptions of normality and homoscedasticity of many parametric statistical tests. Normal scores tests, which employ normal order deviates (rankits), provide an attractive alternative for treatment of such data. Computer programs Rankit and Mathematica provide a practical method of calculating rankits and converting raw data, making normal scores tests more accessible.","Three-dimensional shapes of cryptostome bryozoan autozooecial chambers are important for systematics and paleoecologic interpretations, however, computer automation of three-dimensional reconstruction from serial sections is not yet practical.","Based on morphometric analysis of the rhabdomesoid Streblotrypa prisca, ecophenotypic and geographic variation are significant factors for microevolutionary studies. Apparently non-astogenetic morphologic growth gradients are demonstrated with colonies of S. prisca. A morphologic cline distributed over a 300 km transect is demonstrated; control is unclear, but it may be associated with a depth gradient.","Made available in DSpace on 2011-05-07T14:09:46Z (GMT). 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