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dc.contributor.author
Vega, Alvaro Jose  
dc.contributor.author
Dematteis, Massimiliano  
dc.date.available
2019-05-22T21:26:58Z  
dc.date.issued
2011-06  
dc.identifier.citation
Vega, Alvaro Jose; Dematteis, Massimiliano; Pollen morphology of some species of Vernonanthura (Asteraceae, Vernonieae) from southern South America; American Association of Stratigraphic Palynologists Foundation; Palynology; 35; 1; 6-2011; 94-102  
dc.identifier.issn
0191-6122  
dc.identifier.uri
http://hdl.handle.net/11336/76910  
dc.description.abstract
Pollen grains from 16 species of Vernonanthura H. Rob. were studied. All the species exhibit the type 'A' pollen characteristic of the genus. These grains are spheroidal to prolate-spheroidal, subechinolophate, tricolporate, with a continuous tectum which is densely microperforate, exhibiting lophae surrounding irregular depressions and having prominent spines. Despite most of the species having a similar pollen type, some taxa can be recognised by the morphology of the spines. According to the spine index (length/width), the species analysed can be divided into three groups having respectively short, medium and long spines. In addition to the size of the spines, some taxa can be distinguished by spine shape. Vernonanthura pinguis (Griseb.) H. Rob. has spines which are constricted at the base, while V. oligactoides (Less.) H. Rob. exhibits small conical spines. Vernonanthura nudiflora (Less.) H. Rob. and V. schulziana (Cabrera) H. Rob. have spines with rounded apices. This study confirms that Vernonanthura is a well-defined group based on pollen characteristics and that pollen morphology is a significant feature in the characterisation of species and genera of Vernonieae. © 2011 AASP - The Palynological Society.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
American Association of Stratigraphic Palynologists Foundation  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Evolution  
dc.subject
Pollen  
dc.subject
Taxonomy  
dc.subject
Vernonia  
dc.subject.classification
Ciencias de las Plantas, Botánica  
dc.subject.classification
Ciencias Biológicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Pollen morphology of some species of Vernonanthura (Asteraceae, Vernonieae) from southern South America  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-05-14T14:04:42Z  
dc.journal.volume
35  
dc.journal.number
1  
dc.journal.pagination
94-102  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Vega, Alvaro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina  
dc.description.fil
Fil: Dematteis, Massimiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina  
dc.journal.title
Palynology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/01916122.2010.549290  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/01916122.2010.549290