Results 51 to 60 of about 838 (164)

Presencia de Bryopsida fértil en los niveles Westfalianos del subgrup Itararé, Cuenca de Paraná, Brasil [PDF]

open access: yes, 2004
The bryophyte fossils are rare, mainly in Paleozoic sedimentary rocks in spite of being present since the Silurian Period. In the Division Bryophyta, the fossils that belong to the Class Bryopsida are recognized since the Carboniferous, but they are ...
Amaral, Paula G. C.   +3 more
core  

Vegetational composition of the Early Cretaceous Chicalhão flora (Lusitanian Basin, western Portugal) based on palynological and mesofossil assemblages [PDF]

open access: yes, 2014
A new Early Cretaceous flora is described from the Lusitanian Basin in the Estremadura region (western Portugal) based on a combined study of mesofossils and palynomorphs.
Dinis, Jorge   +3 more
core   +1 more source

LANTANA LOPEZ-PALACII, NUEVO HOSPEDANTE PARA LAS ESPECIES DE UREDINALES SOBRE LANTANA EN COLOMBIA Y PRIMER REGISTRO DE PROSPODIUM TUBERCULATUM PARA ECUADOR

open access: yesCaldasia, 2002
El orden Uredinales constituye el más importantey numeroso grupo de hongosfitoparásitos, caracterizados por un ampliorango de hospedantes que incluye miembrosde Lycophyta, Briophyta, Pteridophyta,Pinophyta y ...
PARDO-CARDONA VÍCTOR MANUEL
doaj  

Lycophyta e samambaias do Parque Nacional da Serra do Itajaí, Vale do Itajaí, SC, Brasil

open access: yesHoehnea
Este trabalho apresenta o levantamento das espécies de Lycophyta e samambaias do Parque Nacional da Serra do Itajaí, Santa Catarina. O Parque possui, no total, 57.475 ha, com altitudes que variam de 150 a 940 m, sendo coberto por Floresta Ombrófila Densa.
André Luís de Gasper, Lucia Sevegnani
doaj   +1 more source

Stratigraphy and Paleoecology of Quaternary Sediments Along Pasley River, Boothia Peninsula, Central Canadian Arctic [PDF]

open access: yes, 1987
Quaternary sediments exposed along Pasley River consist of a lower marine deltaic sand overlain in succession by complexly interbedded tills and glaciomarine sediments (the lower glacigenic assemblage), by a mid-section fluvial gravel, by an upper marine
Dyke, Arthur S., Matthews, John V.
core   +1 more source

Feeding adaptations in Triassic Dicynodonts [PDF]

open access: yes, 1978
Main articleThe Dicynodontia declined markedly at the close of the Permian, entered the Triassic with very few species and had a final burst of evolutionary success in the Middle Triassic, before being overcome by archosaurian competitors in the Upper ...
Cruickshank, A. R. I.
core  

Mathematical modeling and comparison of protein size distribution in different plant, animal, fungal and microbial species reveals a negative correlation between protein size and protein number, thus providing insight into the evolution of proteomes [PDF]

open access: yes, 2012
Background The sizes of proteins are relevant to their biochemical structure and for their biological function. The statistical distribution of protein lengths across a diverse set of taxa can provide hints about the evolution of proteomes. Results Using
Axel Tiessen   +2 more
core   +1 more source

Epífitas vasculares: histórico, participação taxonómica e aspectos relevantes, com ênfase na Mata Atlântica

open access: yesHoehnea
O Dossel é um ecossistema complexo e ecologicamente diverso, possuindo espécies, nichos e processos próprios. Dentre as diversas formas de vida que o compõem, destaca-se a epífita.
Rodrigo de Andrade Kersten
doaj   +1 more source

Lycophytes and Monilophytes (Pteridophytes) of the Floresta Nacional de Caxiuanã, Pará State, Brazil: key to the families, and to species of Aspleniaceae and Blechnaceae [PDF]

open access: yesBoletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2008
This study of the Aspleniaceae and Blechnaceae of the Caxiuanã National Forest (FLONA), is part of a series on the floristic, taxonomic and ecological studies of the Lycophyte and Monilophyte flora of the ecosystems of the Brazilian state of Pará.
Marcio Roberto Pietrobom da Silva   +1 more
doaj  

La colección de preparados palinológicos de la Cátedra de Palinología de la Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP), Buenos Aires, Argentina [PDF]

open access: yes, 2014
Fil: Yañez, Agustina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Palinología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo
Copello, Manuel   +13 more
core   +1 more source

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