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Pollen morphology of some species of Vernonia s. l. (Vernonieae, Asteraceae) from Argentina and Paraguay
(Taylor & Francis As, 2008-06)
Pollen morphology is widely used in taxonomic treatments of tribe Vernonieae, and differences in exine structure and aperture form have been described for many species within the genera comprising the tribe. However, in ...
Pollen morphology of some species of Vernonanthura (Asteraceae, Vernonieae) from southern South America
(American Association of Stratigraphic Palynologists Foundation, 2011-06)
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, ...
Fauna del Jurásico inferior en los cuadrángulos de Chachapoyas, Rioja, Bolívar y Paccha – Perú
(Sociedad Geológica del PerúPE, 1997-03)
Durante el relevamiento geológico de los cuadrángulos del NE del Perú, efectuados por la Dirección de la Carta Geológica del INGEMMET, se ha colectado fauna del Jurásico inferior, de los cuadrángulos de Chachapoyas, Bolívar, ...