Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications

Detalhes bibliográficos
Autor(a) principal: Bicudo,Carlos E. de M
Data de Publicação: 1988
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Botanica Brasilica
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061988000100001
Resumo: Polymorphism in a population of the desmid (Zygnemaphyceae) Cosmarium abbreviatum Raciborski var. minus (West & West) Krieger & Gerloff is reported from material collected from 3 stations at the Lily Pond located in the Parque Estadual das Fontes do Ipiranga, São Paulo City, southern Brazil. From the examination of approximately 200 plants, 6 different morphological expressions were described and the following remarks made: 1) a detailed analysis of sample populations is absolutely necessary for the definition of species and infraspecific categories among desmids; 2) the morphological characteristics presently used for the delimitation of certain species, which are built up of individuals of very small size, seem to have no great taxonomical significance when only isolated individuals are analysed; and 3) taxa, such as Cosmarium angulosum Bréb. var. angulosum f. angulosum, C. abbreviatum Rac. var. minus (West & West) Krieg. & Gerl., C. succisum G.S. West var. jaoi Krieg. & Gerl., C. tinctum Ralfs var. tinctum, and C. minimum West & West var. minimum are of doubtful validity and may prove to be merely polymorphic expressions of C. abbreviatum var. minus.
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spelling Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implicationsCosmarium abbreviatum var. minuspolymorphismsynonymyZygnemaphyceaeCosmarium abbreviatum var. minusdesmídiapolimorfismosinonimiaZygnemaphyceaePolymorphism in a population of the desmid (Zygnemaphyceae) Cosmarium abbreviatum Raciborski var. minus (West & West) Krieger & Gerloff is reported from material collected from 3 stations at the Lily Pond located in the Parque Estadual das Fontes do Ipiranga, São Paulo City, southern Brazil. From the examination of approximately 200 plants, 6 different morphological expressions were described and the following remarks made: 1) a detailed analysis of sample populations is absolutely necessary for the definition of species and infraspecific categories among desmids; 2) the morphological characteristics presently used for the delimitation of certain species, which are built up of individuals of very small size, seem to have no great taxonomical significance when only isolated individuals are analysed; and 3) taxa, such as Cosmarium angulosum Bréb. var. angulosum f. angulosum, C. abbreviatum Rac. var. minus (West & West) Krieg. & Gerl., C. succisum G.S. West var. jaoi Krieg. & Gerl., C. tinctum Ralfs var. tinctum, and C. minimum West & West var. minimum are of doubtful validity and may prove to be merely polymorphic expressions of C. abbreviatum var. minus.Sociedade Botânica do Brasil1988-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061988000100001Acta Botanica Brasilica v.2 n.1-2 1988reponame:Acta Botanica Brasilicainstname:Sociedade Botânica do Brasil (SBB)instacron:SBB10.1590/S0102-33061988000100001info:eu-repo/semantics/openAccessBicudo,Carlos E. de Meng2011-06-17T00:00:00Zoai:scielo:S0102-33061988000100001Revistahttps://www.scielo.br/j/abb/ONGhttps://old.scielo.br/oai/scielo-oai.phpacta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com1677-941X0102-3306opendoar:2011-06-17T00:00Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)false
dc.title.none.fl_str_mv Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
title Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
spellingShingle Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
Bicudo,Carlos E. de M
Cosmarium abbreviatum var. minus
polymorphism
synonymy
Zygnemaphyceae
Cosmarium abbreviatum var. minus
desmídia
polimorfismo
sinonimia
Zygnemaphyceae
title_short Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
title_full Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
title_fullStr Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
title_full_unstemmed Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
title_sort Polymorphism in the desmid Cosmarium abbreviatum var. minus (Zygnemaphyceae) and its taxonomic implications
author Bicudo,Carlos E. de M
author_facet Bicudo,Carlos E. de M
author_role author
dc.contributor.author.fl_str_mv Bicudo,Carlos E. de M
dc.subject.por.fl_str_mv Cosmarium abbreviatum var. minus
polymorphism
synonymy
Zygnemaphyceae
Cosmarium abbreviatum var. minus
desmídia
polimorfismo
sinonimia
Zygnemaphyceae
topic Cosmarium abbreviatum var. minus
polymorphism
synonymy
Zygnemaphyceae
Cosmarium abbreviatum var. minus
desmídia
polimorfismo
sinonimia
Zygnemaphyceae
description Polymorphism in a population of the desmid (Zygnemaphyceae) Cosmarium abbreviatum Raciborski var. minus (West & West) Krieger & Gerloff is reported from material collected from 3 stations at the Lily Pond located in the Parque Estadual das Fontes do Ipiranga, São Paulo City, southern Brazil. From the examination of approximately 200 plants, 6 different morphological expressions were described and the following remarks made: 1) a detailed analysis of sample populations is absolutely necessary for the definition of species and infraspecific categories among desmids; 2) the morphological characteristics presently used for the delimitation of certain species, which are built up of individuals of very small size, seem to have no great taxonomical significance when only isolated individuals are analysed; and 3) taxa, such as Cosmarium angulosum Bréb. var. angulosum f. angulosum, C. abbreviatum Rac. var. minus (West & West) Krieg. & Gerl., C. succisum G.S. West var. jaoi Krieg. & Gerl., C. tinctum Ralfs var. tinctum, and C. minimum West & West var. minimum are of doubtful validity and may prove to be merely polymorphic expressions of C. abbreviatum var. minus.
publishDate 1988
dc.date.none.fl_str_mv 1988-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061988000100001
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061988000100001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0102-33061988000100001
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Botânica do Brasil
publisher.none.fl_str_mv Sociedade Botânica do Brasil
dc.source.none.fl_str_mv Acta Botanica Brasilica v.2 n.1-2 1988
reponame:Acta Botanica Brasilica
instname:Sociedade Botânica do Brasil (SBB)
instacron:SBB
instname_str Sociedade Botânica do Brasil (SBB)
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reponame_str Acta Botanica Brasilica
collection Acta Botanica Brasilica
repository.name.fl_str_mv Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)
repository.mail.fl_str_mv acta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com
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