منابع مشابه
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We present phylogenetic analyses of both molecular and morphological data for the 23 major lineages of living turtles and seven key fossil taxa. Nearly 1 kilobase of cytochrome b sequence, 325 base pairs of 12S ribosomal DNA, and 115 morphological characters contained similar phylogenetic information, although each provided unique information on different nodes of chelonian history. A character...
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The genus Phrynosoma includes 13 species of North American lizards characterized by unique and highly derived morphologies and ecologies. Understanding interspecific relationships within this genus is essential for testing hypotheses about character evolution in this group. We analyzed mitochondrial ND4 and cytochrome b gene sequence data from all species of Phrynosoma in conjunction with a pre...
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There is an obvious need for automated classi cation of galaxies, as the number of observed galaxies increases very fast. We examine several approaches to this problem, utilising Arti cial Neural Networks (ANNs). We quote results from a recent study which show that ANNs can classsify galaxies morphologically as well as humans can. key-words { galaxies : classi cation data processing
متن کاملMolecular phylogeny and morphological homoplasy in fruitbats.
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متن کاملComputational approaches to species phylogeny inference and gene tree reconciliation.
An intricate relation exists between gene trees and species phylogenies, due to evolutionary processes that act on the genes within and across the branches of the species phylogeny. From an analytical perspective, gene trees serve as character states for inferring accurate species phylogenies, and species phylogenies serve as a backdrop against which gene trees are contrasted for elucidating ev...
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ژورنال
عنوان ژورنال: American Zoologist
سال: 1998
ISSN: 0003-1569
DOI: 10.1093/icb/38.6.942