Non marine dinoflagellate cysts from the Holocene of Buenos Aires province, Argentina: relationship with recent species of Peridinium
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چکیده
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Pollen morphology of Oxalis species from Buenos Aires province (Argentina).
Pollen morphology and the degree of pollen variability within nine species and two varieties of Oxalis species from Buenos Aires Province (Argentina) were studied using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Oxalis pollen grain is generally 3-colpate and the shape is prolate spheroidal, oblate spheroidal or spheroidal. The exine is ...
متن کاملOrbicules diversity in Oxalis species from the province of Buenos Aires (Argentina).
Eleven Oxalis L. species from the province of Buenos Aires (Argentina) were investigated with scanning and transmission electron microscopes. We identified four different types and two subtypes of orbicules. We conclude that the close morphological similarity between these species is also reflected in their orbicules, and we suggest that the orbicules morphology may be a useful character in sys...
متن کاملPrevalence of cholelithiasis in Buenos Aires, Argentina.
BACKGROUND Cholelithiasis is an important cause of morbidity in the world and it varies significantly depending on the region of study. OBJECTIVE To assess the prevalence of cholelithiasis in Buenos Aires. MATERIAL AND METHODS This is a cross-sectional, descriptive, observational study performed in a public hospital with tertiary care in Gastrointestinal Surgery. From July 2010 to December ...
متن کاملAge structure of adult mosquito (Diptera: Culicidae) populations from Buenos Aires Province, Argentina.
In order to detect seasonal trends in the age structure of adult mosquitoes from Buenos Aires province, Argentina, female populations were sampled with CDC traps during 1989-1991 in Punta Lara and La Plata. The mosquitoes were dissected and age-grouped according to ovarian tracheation and ovariolar stages. All Runchomyia paranensis females were parous, suggesting that this species could be auto...
متن کاملMuscidae (Insecta: Diptera) of Argentina: revision of Buenos Aires province fauna, with a pictorial key to species.
The knowledge of Muscidae of Argentina is fragmentary and incomplete. In this work, 43 species of Muscidae are recorded from Buenos Aires province, the largest and the most populated of Argentina. Redescriptions of Dolichophaonia trigona (Shannon & Del Ponte), Helina nivaloides Albuquerque, Mydaea sexpunctata (Wulp) are presented. Two new synonymies are proposed: Mydaea latomensis Snyder is est...
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ژورنال
عنوان ژورنال: Revista del Museo Argentino de Ciencias Naturales
سال: 2006
ISSN: 1514-5158
DOI: 10.22179/revmacn.8.310