Systematics and the origin of species, from the viewpoint of a zoologist
Ernst Mayr is perhaps the most distinguished biologist of the twentieth century, and "Systematics and the Origin of Species" may be one of his greatest and most influential books. This classic study, first published in 1942, helped to revolutionize evolutionary biology by offering a new approach to taxonomic principles and correlating the ideas and findings of modern systematics with those of other life science disciplines. This book is one of the foundational documents of the "Evolutionary Synthesis." It is the book in which Mayr pioneered his new concept of species based chiefly on such biological factors as interbreeding and reproductive isolation, taking into account ecology, geography, and life history. In his new introduction for this edition, Mayr reflects on the place of this enduring work in the subsequent history of his field.
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The Methods and Principles or Systematics
Taxonomic Characters and Their Variation
Phenomena of Geographic Variation
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allopatric Amer analysis animals authors barriers biological races butterflies changes classification considered correlated described developed discontinuous discussion distinct distribution Dobzhansky 1941a Drosophila ecological evolution evolutionary example exist fact factors fauna fertile forms gall wasps gaps gene genera genetic basis geneticist genus geographic races geographic speciation geographic variation Goldschmidt groups Guinea habitat higher categories hybrid zones important individual variation insects interbreeding intergradation islands isolating mechanisms known lakes localities males mammals mating Mayr monotypic morphological mountain mutations nature North number of species occur origin of species overlap Palearctic parthenogenesis particularly percent phenotypical phylogenetic physiological plumage polymorphism polytypic species populations range reason recent related species Rensch reproductive isolation seems selection separated sexual sibling species similar single snails Solomon Islands species concept species definition species formation species of birds specimens subspecies superspecies sympatric speciation systematist taxonomic taxonomic characters taxonomist tion variability Zool