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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Cryptostomatous Bryozoa from the Middle Devonian Traverse group of Michigan

McNair, Andrew Hamilton, January 1900 (has links)
Thesis (Ph. D.)--University of Michigan, 1935. / Cover title. Without thesis note. Descriptive letterpress on versos facing the plates. "Literature cited": p. 167-169.
12

Cryptostomatous Bryozoa from the Middle Devonian Traverse group of Michigan

McNair, Andrew Hamilton, January 1900 (has links)
Thesis (Ph. D.)--University of Michigan, 1935. / Cover title. Without thesis note. Descriptive letterpress on versos facing the plates. "Literature cited": p. 167-169.
13

Bryozoan faunas of the Stone River group of Central Tennessee ... /

Coryell, Horace Noble, January 1921 (has links)
Thesis (Ph. D.)--University of Chicago, 1919. / The verso of each plate contains letterpress descriptive of plate opposite. "Private edition, distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from Proceedings of the Indiana Academy of Science for 1919."
14

Lower Permian Bryozoa from Carlin Canyon, Nevada

Kussow, Roger G. January 1964 (has links)
No description available.
15

Investigação do padrão de distribuição do briozoário cosmopolita Zoobotryon verticillatum (Ctenostomata, Vesiculariidae), através de dados moleculares / Investigation of ditribution pattern of cosmopolitan bryozoan Zoobotryon verticillatum (Ctenostomata, Vesiculariidae) through molecular data

Nascimento, Karine Bianca 28 May 2015 (has links)
Zoobotryon verticillatum (delle Chiaje, 1822) é um briozoário cosmopolita amplamente distribuído em regiões tropicais e temperadas em todos os oceanos. Por possuir meios de distribuição natural restritos, é possível supor que o táxon se trate de um complexo de espécies crípticas ou de uma espécie vastamente introduzida por ação antrópica. Para elucidar essa questão, foram realizadas análises populacionais e filogenéticas utilizando-se dois genes mitocôndrias, citocromo c oxidase subunidade 1 região 3\' (COI-3P) e subunidade ribossomal RNA 16S (16S). As análises filogenéticas suportaram o monofiletismo de Z. verticillatum e, juntamente com as análises populacionais, indicam que é uma única espécie distribuída mundialmente. A falta de uma estrutura geográfica evidente nas redes haplotípicas, a ausência majoritária de relacionamentos dicotômicos e clados altamente suportados (pp >= 5%) nas árvores filogenéticas, a falta de resultados significativos na maioria dos teste D e Fs realizados, a baixa diversidade genética em nível populacional e a falta de diferenciação genética entre a maioria das populações comparadas são compatíveis com um processo distribuição antrópico para Z. verticillatum. No entanto, com base nos resultados obtidos durante esta pesquisa, não é possível inferir um possível centro de dispersão ou local de origem para a espécie. / Zoobotryon verticillatum (delle Chiaje, 1822) is a cosmopolitan bryozoan largely distributed in tropical and temperate waters of all oceans. With limited natural dispersal capabilities, it is reasonable to suppose that the taxon is a complex of cryptic species or a widespread species due to anthropogenic activity. In order to elucidate this question, analyses of two mitochondrial genes, cytochrome c oxidase subunit 1 (COI) and ribosomal RNA subunit (16S) were conducted. Phylogenetic data supported the monophyletism of Z. verticillatum and, together with the population analysis, indicated that it is one species with worldwide distribution. The absence of geographical structure in the haplotype networks, the majority absence of dichotomous relationships, and highly supported clades (pp >= 5%) in phylogenetic trees, the lack of significance in the D test and Fs statistics, the low genetic diversity at the population level and the lack of genetic differentiation between most of the population comparison are consistent with anthropogenic introduction process for Z. verticillatum. However, based on the results obtained during this study, it is not yet possible to infer the center of dispersion for the species.
16

Paleobiogeography of Devonian bryozoa in Laurussia

Holmquist, Emily Kristin. January 2008 (has links)
Thesis (M.S.)--Michigan State University. Dept. of Geological Sciences, 2008. / "Advisor, Dr. Robert L. Anstey"--Acknowledgements. "The purpose of this study is to delineate patterns of endemism in Devonian bryozoans in North America and Europe, and to suggest hypotheses for the development of biogeographic regions during the period"--Introd. Title from PDF t.p. (viewed on Aug. 4, 2009) Includes bibliographical references (p. 38-44). Also issued in print.
17

Investigação do padrão de distribuição do briozoário cosmopolita Zoobotryon verticillatum (Ctenostomata, Vesiculariidae), através de dados moleculares / Investigation of ditribution pattern of cosmopolitan bryozoan Zoobotryon verticillatum (Ctenostomata, Vesiculariidae) through molecular data

Karine Bianca Nascimento 28 May 2015 (has links)
Zoobotryon verticillatum (delle Chiaje, 1822) é um briozoário cosmopolita amplamente distribuído em regiões tropicais e temperadas em todos os oceanos. Por possuir meios de distribuição natural restritos, é possível supor que o táxon se trate de um complexo de espécies crípticas ou de uma espécie vastamente introduzida por ação antrópica. Para elucidar essa questão, foram realizadas análises populacionais e filogenéticas utilizando-se dois genes mitocôndrias, citocromo c oxidase subunidade 1 região 3\' (COI-3P) e subunidade ribossomal RNA 16S (16S). As análises filogenéticas suportaram o monofiletismo de Z. verticillatum e, juntamente com as análises populacionais, indicam que é uma única espécie distribuída mundialmente. A falta de uma estrutura geográfica evidente nas redes haplotípicas, a ausência majoritária de relacionamentos dicotômicos e clados altamente suportados (pp >= 5%) nas árvores filogenéticas, a falta de resultados significativos na maioria dos teste D e Fs realizados, a baixa diversidade genética em nível populacional e a falta de diferenciação genética entre a maioria das populações comparadas são compatíveis com um processo distribuição antrópico para Z. verticillatum. No entanto, com base nos resultados obtidos durante esta pesquisa, não é possível inferir um possível centro de dispersão ou local de origem para a espécie. / Zoobotryon verticillatum (delle Chiaje, 1822) is a cosmopolitan bryozoan largely distributed in tropical and temperate waters of all oceans. With limited natural dispersal capabilities, it is reasonable to suppose that the taxon is a complex of cryptic species or a widespread species due to anthropogenic activity. In order to elucidate this question, analyses of two mitochondrial genes, cytochrome c oxidase subunit 1 (COI) and ribosomal RNA subunit (16S) were conducted. Phylogenetic data supported the monophyletism of Z. verticillatum and, together with the population analysis, indicated that it is one species with worldwide distribution. The absence of geographical structure in the haplotype networks, the majority absence of dichotomous relationships, and highly supported clades (pp >= 5%) in phylogenetic trees, the lack of significance in the D test and Fs statistics, the low genetic diversity at the population level and the lack of genetic differentiation between most of the population comparison are consistent with anthropogenic introduction process for Z. verticillatum. However, based on the results obtained during this study, it is not yet possible to infer the center of dispersion for the species.
18

Cladistic Analysis of the Paleozoic Bryozoan Families Monticuliporidae and Mesotrypidae

Adamczyk, Amber Diane 16 March 2011 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Two closely related families of Ordovician bryozoans, the Monticuliporidae and the Mesotrypidae, collectively contain 12 genera that have been reclassified repeatedly by various authors. Using published illustrations for the type specimens of each genus, character states for 267 morphological attributes were coded. Cladistic results were compared between the programs PAST and PAUP, and contrasted with phenetic methods. PAUP produced the shortest trees, with better summary index values and low homoplasy. Phenetic results varied, depending largely on the similarity measures used. Cladistic analysis produced five tree topologies, the most parsimonious of which consisted of a monophyletic crown group, representing Family Monticuliporidae, and a paraphyletic stem group that included the genera Mesotrypa and Diazipora. The crown group includes the genera Aspidopora, Atactoporella, Acantholaminatus, Peronopora, Homotrypella, Homotrypa, Gortanipora, Monticulipora, Prasopora, and Prasoporina. The paraphyletic stem group matches Astrova’s concept of Family Mesotrypidae. These results suggest the placement of all 12 genera in a single Family Monticuliporidae. Future studies that include data for additional closely related genera in might provide a clearer picture of familial assignments for these, and other, stenolaemate genera.
19

A limnological study of certain fresh-water Polyzoa with special reference to their statoblasts

Brown, Claudeous Jethro Daniels, January 1900 (has links)
Thesis (Ph. D.)--University of Michigan, 1933. / Cover title. Thesis note on label mounted on p. 271. "Reprinted from Transactions of the American microscopical society, vol. LII, no. 4, October,1933." "Literature cited": p. 312-313.
20

Biology of Bryozoa in fouling at Outer Harbour and Angas Inlet.

Brock, Brian J. January 1979 (has links) (PDF)
Thesis (M.Sc.)--University of Adelaide, Dept. of Zoology, 1980.

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