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A second note on the geographical differentiation of Amphisbaena fuliginosa L., 1758 (Squamata, Amphisbaenidae), with a consideration of the forest refuge model of speciation Anais da ABC (AABC)
VANZOLINI,PAULO EMILIO.
The geographical differentiation of Amphisbaena fuliginosa L. is studied with basis on 220 specimens from 99 definite and 2 generic localities, ranging from Panamá to Puno in Peru and Goiás in Brasil. The pattern found is considered to support Vanzolini's 1951 scheme of five subspecies, defined by color pattern and by four meristic characters, and differentiated in consequence of Quaternary paleoecological events. Recent developments relating to models of differentiation in Quaternary tropical South America are briefly considered.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Subspecies; Paleoclimates; Amphisbaena; Refuge model.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000400006
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Climatic characteristics of the late Pleistocene and Holocene continental deposits from southwestern Syria based on palynological data Darwiniana
Hussein,Kamal M..
The goal of this research was to reconstruct the vegetational and climatic changes that took place during the late Pleisocene and Holocene in southwestern Syria. This reconstruction was based on palynological data obtained from the analysis of 27 sediments and surface samples (with a total thickness of 4.55 m) collected from Al-Hijaneh Lake basin (late Pleistocene) and from Al-Aouaj River valley (Holocene). Three pollen zones were established. The oldest one (zone A) corresponds to the late Pleistocene lacustrine deposits of Lake Al-Hijaneh. Zones B and C were defined in the Holocene fluvial- lacustrine deposits of the Al-Aouaj River valley. These three pollen assemblage zones are correlated to synchronic and similar C14 dated pollen zones from Syria,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flora; Holocene; Late Pleistocene; Paleoclimates; Palynology; Syria.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932006000200003
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Paleodistribution of Neotropical species of Erythroxylum (Erythroxylaceae) in humid and dry environments Acta Botanica
Cordeiro,Luciana Silva; Araújo,Francisca Soares de; Koch,Ingrid; Simões,André Olmos; Martins,Fernando Roberto; Loiola,Maria Iracema Bezerra.
ABSTRACT Variation in environmental conditions during the Quaternary period served as important filters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of different vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Erythroxylaceae) because of the vast heterogeneity of habitats in which they occur. We hypothesized that it would be possible to observe geographically distinct distribution patterns of species of Erythroxylum as a result of the climate changes that occurred during the last glacial maximum (LGM) and in the last interglacial period (LIG) of the Pleistocene. We used bioclimatic variables to elaborate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Modeling; Paleoclimates; Vegetation; Pleistocene.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400645
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