Results 251 to 260 of about 334,920 (299)
MAJOR CLADES OF THE ANGIOSPERMS [PDF]
Cladistics, 1985 Abstract— Our knowledge of fundamental angiosperm interrelationships is still very incomplete. The absence of a narrowly circumscribed gymnosperm outgroup, ideally the sister group, makes character evaluation, necessary for a cladistic analysis, difficult.
Kåre Bremer, Rolf Dahlgren
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Biological Theory, 2006
Exploring whether clades can reproduce leads to new perspectives on general accounts of biological development and individuation. Here we apply James Griesemer’s general account of reproduction to clades. Griesemer’s account of reproduction includes a requirement for development, raising the question of whether clades may be meaningfully said to ...
Matthew H. Haber, Andrew Hamilton
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Exploring whether clades can reproduce leads to new perspectives on general accounts of biological development and individuation. Here we apply James Griesemer’s general account of reproduction to clades. Griesemer’s account of reproduction includes a requirement for development, raising the question of whether clades may be meaningfully said to ...
Matthew H. Haber, Andrew Hamilton
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Cross-Clade CD8+ T-Cell Responses With a Preference for the Predominant Circulating Clade
JAIDS Journal of Acquired Immune Deficiency Syndromes, 2005Human immunodeficiency virus (HIV) genetic diversity is a major impediment to the design of a successful vaccine. Even if an HIV vaccine is proven effective, it remains to be seen whether this protection will extend to inter-clade, intra-clade, and recombinant strains. We used recombinant vaccinia-based interferon gamma (IFN) Elispot assays to test the
McKinnon, LR +8 more
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Clade support measures and their adequacy [PDF]
Cladistics, 2008 AbstractIn addition to hypothesis optimality, the evaluation of clade (group, edge, split, node) support is an important aspect of phylogenetic analysis. Here we clarify the logical relationship between support and optimality and formulate adequacy conditions for support measures. Support, S, and optimality, O, are both empirical knowledge claims about
Arnold G. Kluge, Taran Grant
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Herpetological Monographs, 1993
The relationships among the major lineages of frogs are summarized and an un- ranked, phylogenetic taxonomy of Anura is proposed. The names of taxa are defined according to phylogenetic principles. Several currently recognized taxa, such as "Archaeobatrachia", "Discoglos- soidea", "Leiopelmatidae", and "Discoglossidae" are paraphyletic, and the names ...
Linda S. Ford, David C. Cannatella
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The relationships among the major lineages of frogs are summarized and an un- ranked, phylogenetic taxonomy of Anura is proposed. The names of taxa are defined according to phylogenetic principles. Several currently recognized taxa, such as "Archaeobatrachia", "Discoglos- soidea", "Leiopelmatidae", and "Discoglossidae" are paraphyletic, and the names ...
Linda S. Ford, David C. Cannatella
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Natural clades differ from “random” clades: simulations and analyses
Paleobiology, 1981Using computer simulations and analytic calculations, we have evaluated whether conspicuous expansions and contractions of natural clades may have represented chance fluctuations that occurred while probabilities of speciation and extinction remained equal and constant.
Philip W. Signor +3 more
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