Evolution and Speciation in Animals

The relatively more motile major phyletics have evolved more toward species diversity, while the relatively low motile or sessile minor phyletics have gone for more phylum diversity. Interestingly, the non-motile plants and microbes have also moved toward strain/racial diversity within a species rather than species diversity. This book represents the first attempt to quantify environmental factors and life history traits that accelerate or decelerate species diversity in animals. About 15%, 8% and 77% of species are distributed in marine (70% of earth’s surface), freshwater (